International Journals



D.-H. Jeon, D.-K. Hwang, J.-K. Kang, D. Nam, H. Cheong  "Control of Zn Content and Influence on Cu2ZnSnSe4 Thin-Film Solar Cells Fabricated by Coevaporation", Journal Of Nanoscience and Nanotechnology 17, 8236 (2017).

C. Chen, L. Wang, L. Gao, D. Nam, D. Li, K. Li, Y. Zhao, C. Ge, H. Cheong, H. Liu, H. Song, J. Tang "6.5% Certified Sb2Se3 Solar Cells Using PbS Colloidal Quantum Dot Film as Hole Transporting Layer", ACS Energy Letters 2, 2125 (2017).

S. Kim, K. Kim, J.-U. Lee, H. Cheong "Excitonic resonance effects and Davydov splitting in circularly polarized Raman spectra of few-layer WSe2", 2D Materials 4, 045002 (2017).

J. Yang, J.-U. Lee, H. Cheong "Excitation energy dependence of Raman spectra of few-layer WS2", FlatChem 3, 64 (2017).

P. K. Nayak, Y. Horbatenko, S. Ahn, G. Kim, J.-U. Lee, K. Y. Ma, A-R. Jang, H, Lim, D. Kim, S. Ryu,  H. Cheong, N. Park, H. S. Shin "Probing Evolution of Twist-Angle-Dependent Interlayer Excitons in MoSe2/WSe2 van der Waals Heterostructures", ACS Nano 11, 4041 (2017).

K.-J. Yang, J.-H. Sim, D.-H. Son, Y.-I. Kim, D.-H. Kim, D. Nam, H. Cheong, S. Kim, J. Kim, J.-K. Kang "Precursor designs for Cu 2 ZnSn (S, Se) 4 thin-film solar cells", Nano Energy 35, 52 (2017).

D.-K. Hwang, B.-S. Ko, D.-H. Jeon, J.-K. Kang, S.-J. Sung, K.-J. Yang, D. Nam, S. Cho, H. Cheong, D.-H. Kim "Single-step sulfo-selenization method for achieving low open circuit voltage deficit with band gap front-graded Cu2ZnSn(S,Se)4 thin films", Solar Energy Materials & Solar Cells 161, 162 (2017).

K.-J. Yang, J.-H. Sim, D.-H. Son, S.-J. Sung, D.-H. Jeon, D.-K. Hwang, D. Nam, H. Cheong, S.Y. Kim, J.H. Kim, D.-H. Kim, J.-K. Kang "Comparison of chalcopyrite and kesterite thin-film solar cells", Journal of Industrial and Engineering Chemistry 45, 78 (2017).

S.-Y. Kim, J. Kwak, J. H. Kim, J.-U. Lee, Y. Jo, S. Y. Kim, H. Cheong, Z. Lee, S.-Y. Kwon "Substantial improvements of long-term stability in encapsulation-free WS2 using highly interacting graphene substrate", 2D Materials 4, 011007 (2017).

J. Li, S.Y. Kim, D. Nam, X. Liu, J.H. Kim, H. Cheong, W. Liu, H. Li, Y. Sun, Y. Zhang "Tailoring the defects and carrier density for beyond 10% efficient CZTSe thin film solar cells", Solar Energy Materials & Solar Cells 159, 447 (2017).



J.-U. Lee, S. Lee, J. H. Ryoo, S. Kang, T. Y. Kim, P. Kim, C.-H. Park, J.-G. Park, H. Cheong, "Ising-Type Magnetic Ordering in Atomically Thin FePS3", Nano Letters 16, 7433 (2016).

D. K. Singh, S. Cha, D. Nam, H. Cheong, S.-W. Joo, D. Kim "Raman spectroscopic Study in Alkyl Chain Conformation in 1-Butyl-3-methylimidazolium Ionic Liquids and their Aqueous Mixtures"CHEMPHYSCHEM 17, 3040 (2016).

D. Kim, H. Du, T. Kim, S. Shin, S. Kim, M. Song, C.W. Lee, J.-U. Lee, H. Cheong, D. H. Seo, S. Seo "The enhanced low resistance contacts and boosted mobility in two-dimensional p-type WSe2 transistors through Ar+ ion-beam generated surface defects", AIP Advances 6, 105307 (2016).

K. Kim, J.-U. Lee, D. Nam, H. Cheong, "Davydov Splitting and excitonic Resonance Effects in Raman Sepctra of Few-Layer MoSe2", ACS Nano 10, 8113 (2016).

M. Kim, S. Han, J.-H. Kim, J.-U. Lee, Z. Lee, H. Cheong, "Determination of the thickness and orientation of few-layer tungsten ditelluride using polarized Raman spectroscopy", 2D Materials 3, 034004 (2016).

K.-J. Yang, D.-H. Son, S.-J. Sung, J.-H. sim, Y.-I. Kim, S.-N. Park, D.-H. Jeon, J.S. Kim, D.-K. Hwang, C.-W. Jeon, D. Nam, H. Cheong, J.-K. Kang, D.-H. Kim "A band-gap-graded CXTSSe solar cell with 12.3% efficiency", Journal of Materials Chemistry A 4, 10151 (2016).

N. K. Youn, G. L. Agawane, D. Nam, J. Gwak, S. W. Shin, J. H. Kim, J. H. Yun, S. J. Ahn, A. Cho, Y. J. Eo, S. K. Ahn, H. Cheong, D. W. Kim, K.-S. Shin, K. H. Yoon "Cu2ZnSnS4 solar cells with a single spin-coated absorber layer prepared via a simple sol-gel route"International Journal of Energy Research 40, 662 (2016).

D. Nam, S. Cho, J.-H. Sim, K.-J. Yang, D.-H. Son, D.-H. Kim, J.-K. Kang, M.-S. Kwon, C.-W. Jeon,  H. Cheong "Solar converson effciency and distribution of ZnS secondary phase in Cu2ZnSnS4 solar cells"Solar Energy Materials & Solar Cells 149, 226 (2016).

W.-H. Park, I. Jo, B. H. Hong, H. Cheong "Controlling the ripple density and heights: a new way to improve the electrical performance of CVD-grown graphene", Nanoscale 8, 9822 (2016).

Y. Cho, S. Jegal, J.-U. Lee, D. Yoon, S.-M. Choi, Y.-W. Son, H. Cheong "Anisotropic phonon softening of uniaxially strained bilayer graphene", Carbon 103, 473 (2016).

J.-U. Lee, K. Kim, S. H. Han, G. H. Ryu, Z. Lee, H. Cheong "Raman Signatures of Polytypism in Molybdenum Disulfide", ACS NANO 10, 1948 (2016).

W.-H.. Park, H. Cheong "Exploring the SERS background using a sandwiched graphene monolayer with gap-plasmon junctions", Journal of Physics D: Applied Physics 49, 105302 (2016).

M.-S. Kwon, D. Nam, H. Cheong, C.-W. Jeon "Effect of Cu/(Zn+Sn) ratio on the ZnSe position and performance of CZTSe solar cells", Journal of Alloys and Compounds 665, 304 (2016).

H.-T. Kim, M. Kim, A. Sohn, T. Slusar, G. Seo, H. Cheong, D.-W. Kim "Photoheat-induced Schottky nanojunction and indirect Mott transition in VO2: photocurrent analysis", Journal of Physics: Condenced Matter  28, 085602 (2016).

M. Kim, S.-M. Choi, H. A. Yoon, S. K. Choi, J.-U. Lee, J. Kim, S. W. Lee, Y. -W. Son, H. Cheong "Photocurrent generation at ABA/ABC lateral junction in tri-layer graphene photodetector", Carbon 96, 454 (2016).



K.-J. Yang, J.-H. Sim, D.-H. Son, D.-H. Kim, G.-Y. Kim, W. Jo, S. Song, J.H. Kim, D. Nam, H. Cheong, J.-K. Kang "Effects of the compositional ratio distribution with sulfurization temperatures in the absorber layer on the defect and surface electrical characteristics of Cu2ZnSnS4 solar cells", Progress in Photovoltaics: Research and Applications 23, 1771 (2015).

O.Dobrozhan, A. Opanasyuk, M. Kolesnyk, M. Demydenko, H. Cheong, "Substructural investigations, Raman, and FTIR spectroscopies of nanocrystalline ZnO films deposited by pulsed sprayn pyrolysis", Shysica Status Solidi A-Applications and Materials Science 212, 2915 (2015).

P. V. Tuong, Y .J. Yoo, J. W. Park, Y. J. Kim, K. W. Kim, H. Cheong, L.Y. Chen, Y.O. Lee "Multi-plasmon-induced perfect absorption at the third resonance in metamaterials", Journal of Optics 17, 125101 (2015).

D. Nam, J.-U. Lee, H. Cheong, "Excitation energy dependent raman spectrum of MoSe2", Scientific Reports 5, 17113 (2015).

B. S. Tung, B. X. Khuyen, N. V. Dung, V. D. Lam, Y. H. Kim, H. Cheong, Y. Lee "Multi-band near-perfect absorption via the resonance excitation of dark meta-molecules", Optics Communications 356, 362 (2015).

S. Hwang, D.-H. Kim, D.-H. Son, K.-J. Yang, D. Nam, H. Cheong, J.-K. Kang, S.-I. In "Effects of a pre-annealing treatment(PAT) in Cu2ZnSn(S,Se)4 thin films prepared by rapid thermal processing(RTP) selenization", Solar Energy Materials & Solar Cells 143, 218 (2015).

J. Kim, J.-U. Lee, J. Lee, H. J. Park, Z. Lee, C. Lee, H. Cheong "Anomalous polarization dependence of Raman scattering and crystallographic orientation of black phosphorus"Nanoscale 7, 18708 (2015).

J.-U. Lee, K. Kim, H. Cheong "Resonant Raman and photoluminescence spectra of suspended molybdenum disulfide", 2D Materials 2, 044003 (2015).

H.-C. Kim, H. Kim, J.-U. Lee, H.-B. Lee, D.-H. Choi, J.-H. Lee, W. H. Lee, S. H. Jhang, B. H. Park, H. Cheong, S.-W. Lee, H.-J. Chung "Engineering Optical and Electronic Properties of WS2 by Varying the Mumber of Layers", ACS Nano 9, 6854 (2015).

D.H. Son, D.-H. Kim, S.-N. Park, K.-J. Yang, D. Nam, H. Cheong,J.-K. Kang "Growth and Device Characteristics of CZTSSe Thin-Film Solar Cells with 8.03% Efficiency", Chemistry of Materials 27, 5180 (2015).

D.H. Jung, C. Kang, D. Yoon,  H. Cheong, J.S. Lee, M.-H. Bae, Y. D. Park "Anisotropic behavior of hydrogen in the formation of pentagonal graphene domains", Carbon  89, 242 (2015).

M.M. Ivashchenko, I.P. Buryk, A.S. Opanasyuk, D. Nam, H. Cheong, Ja. G. Vaziev, V.V. Bibyk "Influence of deposition conditions on morphological, structural, optical and electro-physical properities of ZnSe films obtained by colse-spaced vacuum sublimation", Materials Science in Semiconductor Processing 36, 13 (2015).

Y. D. Kim, H. Kim, Y. Cho, J. H. Ryoo, C.-H. Park, P. Kim, Y. S. Kim, S. Lee, Y. Li, S.-N. Park, Y. S. Yoo, D. Yoon, V. E. Dorgan, E. Pop, T. F. Heinz, J. Hone, S.-H. Chun, H. Cheong, S. W. Lee, M.-H. Bae, Y. D. Park "Bright visible light emission from graphene", Nature Nanotechnology 10, 676  (2015).

J. Li, Y. Zhang, W. Zhao, D. Nam, H. Cheong, L. Wu, Z. Zhou, Y. Sun "A Temporary Barrier Effect of the Alloy Layer During Selenization: Tailoring the Thickness of MoSe2 for Efficient Cu2ZnSnSe4 Solar Cells", Advanced Energy Materials 5, 1402178 (2015).

O. Dobrozhan, D. Kurbatov, A. Opanasyuk,  H. Cheong, A. Cabot "Influence of substrate temperature on teh structural and optical properties of crystalline ZnO films obtained by pulsed spray pyrolysis", Surface and Interface Analysis 47, 601 (2015).

G. Kim, H.J. Jin, W. Jo, D. Nam,  H. Cheong, H.S. Kim, S.S. Oh, R.K. Ko, Y.S. Jo, D.W. Ha "Ultra-large current transport in thick SmBa2Cu3O7-x films grown by reactive co-evaporation", Physica C:Superconductivity and its Applications 513, 29 (2015).

J.-U. Lee, J. Park, Y.-W. Son,  H. Cheong "Anomalous excitonic resonance Raman effects in few-layered MoS2", Nanoscale 7, 3229 (2015).

Y.  J. Yoo, Y. J. Kim, J.  s. Hwang, J. Y. Rhee, K. W. Kim, Y. H. Kim,  H. Cheong, L. Y. Chen, Y. P. Lee "Triple-band perfect metamaterial absorption, based on single cut-wire bar", Applied Physics Letters  106, 071105 (2015).

V. T. Nguyen, D. Nam, M. Gansukh, S.-N. Park, S.-J. Sung, D.-H. Kim, J.-K. Kang, C. D. Sai, T. H. Tran, H. Cheong, "Influence of sulfate residue on Cu2ZnSnS4 thin films prepared by direct solution method", Solar Energy Materials and Solar Cells  136, 113 (2015).

R. Khazaeinezhad, S. H. Kassani, T. Nazari, H. Jeong, J. Kim, K. Choi, J.-U. Lee, J. H. Kim, H. Cheong, D.-I. Yeom, K. Oh "Saturable optical absorption in MoS2 nano-sheet optically deposited in the optical fiber facet", Optics Communications  335, 224 (2015).



D. Nam, J. Kim, J.-U. Kim, A. Nagaoka, K. Yoshino, W. Cha, H. Kim, I. C. Hwang, K. B. Yoon,  H. Cheong "Polarized Raman Spectroscopy of Cu-poor and Zn-rich single-crystal Cu2ZnSnSe4", Applied Physics Letters  105, 173903 (2014).

Y. J. Yoo, H. Y. Zheng, Y. J. Kim, J. Y. Rhee, J.-H. Kang, K. W. Kim, H. Cheong, Y. H. Kim, Y. P. Lee "Flexible and elastic metamaterial absorber for low frequency, based on small-size unit cell", Applied Physics Letters  105, 041902 (2014).

S. M. Yoon, J.-S. Kim, D. Yoon, H. Cheong, Y. Kim, H. H. Lee "Effects of polycrystallinity in nano patterning by ion-beam sputtering", Journal of Applied Physics  116, 024307 (2014).

A. S. Opanasyuk, P. V. Koval, D. Nam, H. Cheong, A. R. Jeong, W. Jo, A. G. Ponomarev "The structure, phase and chemical composition of CZTSe thin films", Functional Materials  21, 164 (2014).

I.-S. Byun, W. Kim, D. W. Boukhvalov, I. Hwang, J. W. Son, G. Oh, J. S. Choi, D. Yoon, H. Cheong, J. Baik, H.-J. Shin, H. W. Shiu, C.-H. Chen, Y.-W. Son, B. H. Park "Electrical control of nanoscale functionalization in graphene by the scanning probe technique", NPG Asia Materials  6, e102 (2014).

M. Gwon, Y. Lee, J. W. Wu, D. Nam, H. Cheong, D.-W. Kim "Polarization-independent light emission enhancement of ZnO/Ag nanogrationg via surface plasmon polariton excitation and cavity resonance", ACS Applied Materials & Interfaces  6, 8602 (2014).

D.Nam, H. Cheong, A. S. Opanasyuk, P. V. Koval, V. V. Kosyak, P. M. Fochuk "Raman investigation in thin and thick CdTe films obtained by close spaced vacuum sublimation thchnique", Physica Status Solidi C  1, (2014).

D. Nam, A. S. Opanasyuk, P. V.  Koval, A. G. Ponomarev, A. R. Jeong, G. Y. kim, W. Jo, H. Cheong, "Composition variations in Cu2ZnSe4 thin film analyzed by X-ray diffraction, energy dispersive X-ray spectroscopy, particle induced X-ray emission, photoluminescence, and Ramin spectroscopy", Thin solid films  562, 109 (2014).

H. Lim, S.-E. Choi, H. Cheong, J. S. Lee "Energy trasfer in dye molecule-containing zeolite monolayers", Microporous and Mesoporous Materials  192, 89 (2014).

D.-H. Son, D.-H. Kim, K.-J. Yang, D. Nam, M. Gansukh, H. Cheong, J.-K. Kang "Influence of precursor sulfur content on film formation and the properties of sulfurized Cu2ZnSnS4 thin films for solar cells", Physica Status Solidi A  211, 946 (2014).

T. A. Nguyen, J.-U. Lee, D. Yoon, H. Cheong, "Excitation Energy Dependent Raman Signatures of ABA- and ABC-stacked Few-layer Graphene", Scientific Reports  4, 4630 (2014).

G.-J. Lee, N. G. Deshpande, Y. P. Lee, H. Cheong, N. Swami, J. S. Bhat, "Optical and Structural Properties of AI-ZnO Nanocomposites", Jouranl of Nanoscience and Nanotechnology  14, 3661 (2014).

J.-U. Lee, N. M. Seck, D. Yoon, S.-M. Choi, Y.-W. Son, H. Cheong, "Polarization dependence of double resonant Raman scattering band in bilayer graphene", Carbon  72, 257 (2014).

S.-N. Park, S.-J. Sung, D.-H. Son, D.-H. Kim, M. Gansukh, H. Cheong, J.-K. Kang, "Solution-processed Cu2ZnSnS4 absorbers prepared by appropriate inclusion and removal of thiourea for thin film solar cells", RSC Adv. 4, 9118 (2014).

D. H. Jung, C. Kang, M. kim, H. Cheong, H. Lee, J. S. Lee, "Effects of Hydrogen Partial Pressure in the Annealing Process on Graphene Growth", J. Phys. Chem. C 118, 3574 (2014).

K. H. Lee, B. Lee, S.-J. Hwang, J.-U. Lee, H. Cheong, O.-S. Kwon, K. Shin, N.-H. Hur, "Large scale production of highly conductive reduced graphene oxide sheets by a solvent-free low temperature reduction", Carbon 69, 327 (2014).

H. Kim, U. S. Jung, S. I. Kim, D. Yoon, H. Cheong, C. W. Lee, S. Woo Lee, "Young's modulus of ZnO microwires determined by various mechanical measurement methods", Current Applied Physics 14, 166 (2014).



Y. J. Yoo, Y. J. Kim, P. V. Tuong, J. Y. Rhee, K. W. Kim, W. H. Jang, Y. H. Kim, H. Cheong, Y. P. Lee, "Polarization-indepenednt dual-band perfect absorber utilizing multiple magnetic resonances", Optics Express  21, 32484 (2013).

Y. Cho, D.-W. Kim, S. Ahn, D. Nam, H. Cheong, G. Y. Jeong, J. G., J. H. Yun, "Recombination in Cu(In,Ga)Se2 thin-film solar cells containing ordered vacancy compound phases", Thin Solid Films  546, 358 (2013).

M. Kim, D. Yoon, S. K. Choi, H. Cheong, H. A. Yoon, S. W. Lee, "Polarization dependence of the photocurrent due to an anisotropic electron-photon interaction in Pd-graphene-Pd devices", J. Korean Phys. Soc. 63, 1019 (2013).

J.-S. Kim, J. S. Choi, M. J. Lee, B. H. Park, D. Bukhvalov, Y.-W. Son, D. Yoon, H. Cheong, J.-N. Yun, Y. Jung, J. Y. Park, N. Salmeron, “Between Scylla and Charybdis: Hydrophobic graphene-guided water diffusion on hydrophilic substrate,” Scientific Reports 3, 2309 (2013).

D. Yoon, D. Jeong, H.-J. Lee, R. Saito, Y.-W. Son, H. C. Lee, H. Cheong, “Fano resonance in Raman scattering of graphene,” Carbon 61, 373 (2013).

P. V. Tuong, J. W. Park, J. Y. Rhee, K. W. Kim, H. Cheong, W. H. Jang, Y. P. Lee "Symmetric metamaterials based on flower-shaped structure," Mater. Chem. Phys. 141, 535 (2013).

S. Jung, J. Gwak, J. H. Yun, S. Ahn, D. Nam, H. Cheong, S. Ahn, A. Cho, K. Shin, K. Yoon "Cu2ZnSnSe4 thin film solar cells based on a single-step co-evaporation process," Thin Solid Films 535, 52 (2013).

A.R. Jeong, W. Jo, D.Y. Park, H. Cheong, Y.K. Seo, J.H. Park, J.S. Chung, Y.S. Lee, Y.-J. Kwark "Effects of substrates on structural and optical properties of Cu-poor CuGaSe2 thin films prepared by in-situ co-evaporation," Curr. Appl. Phys. 13, 907 (2013).

D. Nam, S. Jung, S. Ahn, J. Gwak, K. Yoon, J. H. Yun, H. Cheong "Influence of growth process on optical properties of Cu(In1?x Gax)Se2 thin film solar cells," Thin Solid Films 535, 118 (2013).

S. Jegal, Y. Hao, D. Yoon, R. S. Ruoff, H. Yun, S. W. Lee, H. Cheong "Crystallographic orientation of early domains in CVD graphene studied by Raman spectroscopy," Chem. Phys. Lett. 568, 146 (2013).

J. Park, E. D. Grayfer, Y. Jung, K. Kim, K.-K Wang, Y.-R. Kim, D. Yoon, H. Cheong, H.-E. Chung, S.-J. Choi, J.-H. Choy, S.-J. Kim "Photoluminescent nanographitic/nitrogen-doped graphitic hollow shells as a potential candidate for biological applications," J. Mater. Chem. B 1, 1229 (2013).

P. V. Tuong, J. W. Park, J. Y. Rhee, K. W. Kim, W. H. Jang, H. Cheong, and Y. P. Lee "Polarization-insensitive and polarization-controlled dual-band absorption in metamaterials," Appl. Phys. Lett. 102, 081122 (2013).



J.-K. Chio, J.-H.Huh, S.-D. Kim, D. Moom, D. Yoon, K. Joo, J. Kwak, J. H. Chu, S. Y. Kim, K. Park, Y.-W. Kim, E. Yoon, H. Cheong, S.-Y. Kwon "One-step graphene coating of heteroepitaxial GaN films," Nanotechnology 23, 435603 (2012).

H. Y. Zheng, X. R. Jin, J. W. Park, Y. H. Lu, J. Y. Rhee, W. H. Jang, H. Cheong, Y. P. Lee "Tunable dual-band perfect absorbers based on extraordinary optical transmission and Fabry-Perot cavity resonance," Opt. Express 20, 24002 (2012).

J.-U. Lee, D. Yoon, H. Cheong, "Estimation of Young’s Modulus of Graphene by Raman Spectroscopy," Nano Lett.12, 4444 (2012).

M. Kim, H. A. Yoon, S. Woo, D. Yoon, S. W. Lee, H. Cheong, "Polarization dependence of photocurrent in a metal-graphene-metal device," Appl. Phys. Lett. 101, 073103 (2012).

H. G. Na, T. V. Khai, D. S. Kwak, Y. J. Kwon, K. B. Shim, S. S. Kim, H. Cheong, H. W. Kim, "Au-assisted growth, Raman spectra, and photoluminescence of Mg2SiO4 nanowires," J. Ceram. Process. Res. 13, 210 (2012).

P. V. Tuong, J. W. Park, V. D. Lam, K. W. Kim, H. Cheong, W. H. Jang, Y. P. Lee, "Simplified perfect absorber structure," Comput. Mater. Sci. 61, 243 (2012).

J. H. Park, H. Lim, H. Cheong, K. M. Lee, H. C. Sohn, G. Lee, S. Im, "Anisotropic mobility of small molecule-polymer blend channel in organic transistor: Characterization of channel materials and orientation," Org. Electron. 13, 1250 (2012).

H. W. Kim, H. G. Na, J. Bae, J. C. Yang, S. S. Kim, H. Cheong, D. Y. Kim, "Synthesis and characterization of orthorhombic Sb2O4 nanowire prepared by heating Sb2S3 powder," Electrochem. Solid State Lett. 15, K49 (2012).

X.-R. Jin, Y. Lu, J. Park, H. Zheng, F. Gao, Y. Lee, J. Y. Rhee, K. W. Kim, H. Cheong, W. H. Jang, "Manipulation of electromagnetically-induced transparency in planar metamaterials based on phase coupling," J. Appl. Phys. 111, 073101 (2012).

D. Yoon, H. Cheong, J. S. Chio, B. H. Park, "Enhancement of the Raman Scattering Intensity in Folded Bilayer Graphene," J. Korean Phys. Soc. 60, 1278 (2012).

A. S. Opanasyuk, D. I. Kurbatov, M. M. Ivashchenko, I. Yu. Protsenko, H. Cheong, "Properties of the Window Layers for the CZTSe and CZTS Based Solar Cells," J. Nano-Electron. Phys. 4, 01024 (2012).

M. Park, S. Ahn, J. H. Yun, J. Gwak, A. Cho, S. Ahn, K. Shin, D. Nam, H. Cheong, K. Yoon, "Characteristics of Cu(In,Ga)Se2 (CIGS) thin films deposited by a direct solution coating process," J. Alloy. Compd. 513, 68 (2012).

K. Heo, H. Lee, Y. Park, J. Park, H.-J. Lim, D. Yoon, C. Lee, M. Kim, H. Cheong, J. Park, J. Jian, S. Hong, "Aligned networks of cadmium sulfide nanowires for highly flexible photodetectors with improved photoconductive responses," J. Mater. Chem. 22, 2173 (2012).



X.-R. JIn, J. Park, H. Zheng, S. Lee, Y. Lee, J. Y. Rhee, K. W. Kim, H. Cheong, W. H. Jang, "Highly-dispersive transparency at optical frequencies in planar metamaterials based on two-bright-mode coupling," Opt. Express19, 21652 (2011).

N. C. Jeong, H. Lim, H. Cheong, K. B. Yoon, "Distribution Pattern of Length, Length Uniformity, and Density of TiO32- Quantum Wires in an ETS-10 Crystal Revealed by Laser-Scanning Confocal Polarized Micro-Raman Spectroscopy," Angew. Chem.-Int. Edit. 50, 8697 (2011).

D. Park, D. Nam, S. Jung, S. An, J. Gwak, K. Yoon, J. H. Yun, H. Cheong, "Optical characterization of Cu2ZnSnSe4 grown by thermal co-evaporation," Thin Solid Films 519, 7386 (2011).

I.-S. Byun, D. Yoon, J. S. Choi, I. Hwang, D. H. Lee, M. J. Lee, T. Kawai, Y.-W. Son, Q. Jia, H. Cheong, B. H. Park,"Nanoscale Lithography on Monolayer Graphene Using Hydrogenation and Oxidation," ACS Nano 8, 6417 (2011).

D. Yoon, Y.-W. Son, H. Cheong, "Negative Thermal Expansion Coefficient of Graphene Measured by Raman Spectroscopy," Nano Lett. 11, 3227 (2011).

A. R. Jeong, W. Jo, C. Ko, M. Han, S. J. Kang, M. Kim, D. Y. Park, H. Cheong, H. J. Yun, "Growth and structural properties of pulsed laser-ablated CuInSe2 nanoparticles by pulsed-laser ablation and selenization process," J. Alloy. Compd. 509, 8073 (2011).

J. S. Choi, J.-S. Kim, I.-S. Byun, D. H. Lee, M. J. Lee, B. H. Park, C. Lee, D. Yoon, H. Cheong, K. H. Lee, Y.-W. Son, J. Y. Park, M. Salmeron, "Friction Anisotropy- Driven Domain Imaging on Exfoliated Monolayer Graphene," Science333, 607 (2011).

Y. D. Kim, K. Heo, M. R. Cho, S. Cho, D. Yoon, H. Cheong, J. Jian, S. Hong, Y. D. Park, "Determination of Mechanical Properties of Single Crystal CdS Nanowires from Dynamic Flexural Measurements of Nanowire Mechanical Resonators," Appl. Phys. Express 4, 065004 (2011).

G. Kim, W. Jo, H.-S. Ha, S. S. Oh, D. Y. Park, H. Cheong, "Characterization of Co-Evaporated SmBa2Cu3O7 Coated Conductors by Polarized-Raman Scattering Spectroscopy," IEEE Trans. Appl. Supercond. 21, 3352 (2011).

G. J. Lee, Y. P. Lee, H. Lim, H. Cheong, B.-H. Kil, S.-H. Han, "Photoluminescence and Nonlinear Optical Properties of Semiconductor Nanocomposites Consisting of ZnO Nanorods and CdS Nanodots," J. Korean Phys. Soc. 58, 1290 (2011).

H. Lim, H. Cheong, S. Choi, Y. N. Choi, J. S. Lee, "Optical Properties of Organic Dye Molecules Incorporated within Different Zeolitic Structures," J. Korean Phys. Soc. 58, 1035 (2011).

D. Yoon, Y.-W. Son, H. Cheong, "Strain-Dependent Splitting of the Double-Resonance Raman Scattering Band in Graphene," Phys. Rev. Lett. 106, 155502 (2011).

J.-U. Lee, D. Yoon, H. Kim, S. W. Lee, H. Cheong, "Thermal conductivity of suspended pristine graphene measured by Raman spectroscopy," Phys. Rev. B 83, 081419(R) (2011).

S. S. Kim, J. Y. Park, H. S. Kim, H. G. Na, J. C. Yang, S. H. Shim, C. Lee, D. Park, D. Nam, H. Cheong, H. W. Kim,"Temperature-controlled synthesis of In2Ge2O7 nanowires and their photoluminescence properties," J. Phys. D-Appl. Phys. 44, 025502 (2011).

G. J. Lee, S.-K. Min, C.-H. Oh, Y. Lee, H. Lim, H. Cheong, H. J. Nam, C. K. Hwangbo, S.-K. Min, S.-H. Han, "Effects of Seed Layers on Structural, Morphological, and Optical Properties of ZnO Nanorods," J. Nanosci. Nanotechnol. 11, 511 (2011).



J. M. Jin, H. Cheong, "Long-term Durability of Pd/a-WO3 and Pd-Pt/a-WO3 Thin Films for Hydrogen Sensors," J. Korean Phys. Soc. 57, 1885 (2010).

H. Lim, H. Cheong, J. S. Lee, K. B. Yoon, "Depolarization of Luminescence from Dye Molecules in Solutions or Embedded in Zeolite Pores," J. Korean Phys. Soc. 57, 1614 (2010).

G. Kim, A. R. Jeong, W. Joa, D. Y. Park, H. Cheong, G. M. Shin, S. I. Yoo, "Optimal growth conditions for GdBa2Cu3O7 thin-film coated conductors characterized by polarized Raman scattering spectroscopy," Physica C470, 1021 (2010).

G. J. Lee, H. J. Nam, C. K. Hwangbo, H. Lim, H. Cheong, H. S. Kim, C. S. Yoon, S.-K. Min, S.-H. Han, Y. Lee, "Growth of ZnO-Nanorod Grating on the Seed Grating Produced by Femtosecond Laser Pulses," JPN. J. Appl. Phys. 49, 105001 (2010).

H. Lim, S. Park, H. Cheong, H.-M. Choi, Y. C. Kim, "Discrimination between natural and HPHT-treated type IIa diamonds using photoluminescence spectroscopy," Diam. Relat. Mat. 19, 1254 (2010).

G. J. Lee, Y. Lee, H.-H. Lim, M. Cha, S. S. Kim, H. Cheong, S.-K. Min, S.-H. Han, "Photoluminescence and Lasing Properties of ZnO Nanorods," J. Korean Phys. Soc. 57, 1624 (2010).

C. W. Ahn, H.-I. Hwang, K. S. Lee, B. M. Jin, S. Park, G. Park, D. Yoon, H. Cheong, H. J. Lee, I. W. Kim, "Raman Spectra Study of K0.5Na0.5NbO3 Ferroelectric Thin Films," JPN. J. Appl. Phys. 49, 095801 (2010).

S. Ahn, S. Jung, J. Gwak, A. Cho, K. Shin, K. Yoon, D. Park, H. Cheong, J. H. Yun, "Determination of band gap energy (Eg) of Cu2ZnSnSe4 thin films: On the discrepancies of reported band gap values," Appl. Phys. Lett. 97, 021905 (2010).

S. Hong, H. Cheong, G. Park, "Raman analysis of a YBa2Cu3O7-thin film with oxygen depletion," Physica C 470, 383 (2010).

G. J. Lee, K.-M. Lee, W.-S. Hong, S. S. Kim, H. Cheong, C. S. Yoon, Y. Lee, "Fabrication of nanocrystalline silicon gratings embedded within a silicon nitride matrix by femtosecond laser-induced crystallization," JPN. J. Appl. Phys.49, 015502 (2010).



J. Y. Shim, J. D. Lee, J. M. Jin, H. Cheong, S.-H. Lee, "Pd-Pt alloy as a catalyst in gasochromic thin films for hydrogen sensors," Sol. Energy Mater. Sol. Cells 93, 2133 (2009).

J. Y. Shim, J. D. Lee, J. M. Jin, H. Cheong, S.-H. Lee, "Comparison of Pd, Pt and Pt/Pd as catalysts for hydrogen sensor films," J. Korean Phys. Soc. 55, 2693 (2009).

S. S. Kim, Y.-J. Kim, G.-C. Yi, H. Cheong, "Whispering-gallery-modelike resonance of luminescence from a single hexagonal ZnO microdisk," J. Appl. Phys. 106, 094310 (2009).

N. C. Jeong, Y. J. Lee, J.-H. Park, H. Lim, C.-H. Shin, H. Cheong, K. B. Yoon, "New Insights into ETS-10 and titanate quantum wire: a comprehensive characterization," J. Am. Chem. Soc. 131, 13080 (2009).

H. Min, Y. Jeon, S. Park, H. Kwon, J. Pak, D. Park, S. Song, H. Cheong, G. Park, H. Kim, D. Kim, "Second Harmonic Generation from Bi 3.75La0.25Ti3O12 Thin Films Grown by Sol-gel Method," J. Korean Phys. Soc. 55, 1278 (2009).

D. Yoon, H. Moon, Y.-W. Son, J. S. Choi, B. H. Park, Y. H. Cha, Y. D. Kim, H. Cheong, "Interference effect on Raman spectrum of graphene on SiO2/Si," Phys. Rev. B 80, 125422 (2009).

D. Yoon, H. Moon, H. Cheong, J. S. Choi, J. A. Choi, B. H. Park, "Variations in the Raman Spectrum as a Function of the Number of Graphene Layers," J. Korean Phys. Soc. 55, 1299 (2009).

G. J. Lee, Y. Lee, S. S. Kim, H. Cheong, C. S. Yoon, Y.-D. Son, J. Jang, "Effect of post thermal annealing on femtosecond laser crystallization of 500-nm-thick amorphous silicon films," J. Korean Phys. Soc. 55, 50 (2009).

G. Kim, W. Jo, G. M. Shin, S. I. Yoo, D. Y. Park, H. Cheong, H. K. Kim, S. H. Moon, "Growth behaviors of high Jc Gd1+xBa2-xCu3O7 coated conductors on IBAD-MgO templates probed by X-ray diffraction and Raman scattering spectroscopy," IEEE Trans. Appl. Supercond. 19, 2929 (2009).

D. H. Kim, G. E. Lee, E. Yoon, D.-Y. Park, H. Cheong, W. S. Choi, T. W. Noh, J.-H. Cho, J.-S. Park, "Effect of dimethylhydrazine on p-type conductivity of as-grown Mg-doped GaN," Phys. Status Solidi-Rapid Res. Lett. 2-3, 52 (2009).

S. Park, J. Pak, D. Park, H. Cheong, G. Park, "a-axis contribution to the polarization value in (117)/(200)-oriented Bi3.75La0.25Ti3O12 thin films deposited on Pt(111)/Ti/SiO2/Si substrate," J. Korean Phys. Soc. 54, 926 (2009).



D. Yoon, H. Moon, Y.-W. Son, G. Samsonidze, B. H. Park, J. B. Kim, Y. Lee, H. Cheong, "Strong polarization dependence of double-resonant Raman intensities in graphene," Nano Lett. 8, 4270 (2008).

C. Kim, E. Cho, S. Yoon, D. Kim, R. Jung, J. Lee, S. Seo, H. Cheong, M. Bastjan, B. Schulz, M. Ruubhausen,"Structural and stoichiometry change in NiO with a thin IrO2 layer," J. Korean Phys. Soc. 53, 3390 (2008).

H. Lim, H. Cheong, J. S. Lee, K. B. Yoon, "Concentration dependence of the photoluminescence energy and anisotropy from dye molecules and dye molecule-zeolite composites," J. Korean Phys. Soc. 53, 2328 (2008).

G. J. Lee, Y. Lee, S. G. Jung, C. K. Hwangbo, S. S. Kim, H. Cheong, C. S. Yoon, "Photo-structuring of silver-oxide films by using femtosecond laser pulses," J. Korean Phys. Soc. 53, 1414 (2008).

J. Kim, S. A. Yang, Y. C. Choi, J. K. Han, K. O. Jeong, Y. J. Yun, D. J. Kim, S. M. Yang, D. Yoon, H. Cheong, K.-S. Chang, T. W. Noh, S. D. Bu, "Ferroelectricity in highly ordered arrays of ultra-thin-walled Pb(Zr,Ti)O3 nanotubes composed of nanometer-sized Perovskite crystallites," Nano Lett. 8, 1813 (2008).

H. J. Kim, Y. Shin, S.-Y. Kwon, H. J. Kim, S. Choi, S. Hong, C. S. Kim, J.-W. Yoon, H. Cheong, E. Yoon,"Compositional analysis of In-rich InGaN layers grown on GaN templates by metalorganic chemical vapor deposition," J. Cryst. Growth 310, 3004 (2008).

Y. Jeon, J. Sung, C. Seo, H. Lim, H. Cheong, M. Kang, B. Moon, Y. Ouchi, D. Kim, "Structures of ionic liquids with different anions studied by infrared vibration spectroscopy," J. Phys. Chem. B 112, 4735 (2008).

S.-Y. Kwon, H. J. Kim, E. Yoon, Y. Jang, K.-J. Yee, D. Lee, S.-H. Park, D.-Y. Park, H. Cheong, F. Rol, L. S. Dang,"Optical and microstructural studies of atomically flat ultrathin In-rich InGaN/GaN multiple quantum wells," J. Appl. Phys. 103, 063509 (2008).

N. Kim, C. W. Seo, H. Cheong, "Improved durability of Pd/WO3 hydrogen sensor films prepared by sputtering," J. Korean Phys. Soc. 52, s50 (2008).

Y. Jeon, J. Sung, D. Kim, C. Seo, H. Cheong, Y. Ouchi, R. Ozawa, H. Hamaguchi, "Structural change of 1-butyl-3-methylimidazolium tetrafluoroborate + water mixtures studied by infrared vibrational spectroscopy," J. Phys. Chem. B 112, 923 (2008).


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