logo

korean english

게시판

Home > 게시판 > 세미나

아래와 같이 콜로퀴움을 개최하오니 많이 참석해 주시기 바랍니다.

4시 20분부터 제1과학관 31214 e+강의실에서 다과를 준비하오니 많은 참석 부탁드립니다.



아 래



Title: Next-generation solar cells for high photo-conversion efficiency

 
Speaker: Prof. William Jo  (Department of Physics, Ewha Womans University)


Date & Time: Dec. 2(Wed.) 2015, 4:30 PM


Place: Natural Science 1,  Room No. 31214

Abstract: In this talk, we will review our recent results on next-generation solar cells: Cu2ZnSn(S,Se)4 (CZTSSe) and organic-inorganic lead halide perovskites. CZTSSe absorber materials were grown by stacked sputtering method and subsequently annealed in H2Se atmosphere in a furnace. We changed stacking order and thickness of all metal-based precursors of CZTSSe thin-films to reduce the secondary phases and improve the solar cell efficiencies. The photo-conversion efficiency of the CZTSSe cells showed 12.3%, which is the best results among the vacuum deposition methods. To chase with efficiency of CuInGaSe2 solar cell, we explored the secondary phase issues of CZTSSe thin-film solar cells. For this study we performed the phase characterization of CZTSSe thin-film with different depths by using Raman scattering spectroscopy and Kelvin probe force microscopy with depth profiles [1]. On the other hand, we fabricated a mesoporous perovskite solar cell with high conversion efficiencies (>15%), and we investigated its beneficial grain boundary properties of the perovskite solar cells through the use of scanning probe microscopy. The surface work function and the local current were measured using Kelvin probe force microscopy and conductive-atomic force microscopy, respectively. The CH3NH3Pb(I,Br)3 improved the potential barrier at the grain boundary and induced passivation. We also investigated the polarization and hysteretic properties of the perovskite thin-films by measuring the local piezo-response [2].


[1] G. Y. Kim, D.-H. Son, T. T. T. Nguyen, S. Yoon, M. Kwon, C. Jeon, D.-H. Kim, J.-K. Kang, and W. Jo, “Enhancement of photo-conversion efficiency in Cu2ZnSn(S,Se)4 thin-film solar cells by control of ZnS precursor-layer thickness”, Progress in Photovoltaics: Research and Applications (in press).

[2] G. Y. Kim, S. H. Oh, B. P. Nguyen, W. Jo, B. J. Kim, D. G. Lee, H. S. Jung, “Efficient Carrier Separation and Intriguing Switching of Bound Charges in Inorganic−Organic Lead Halide Solar Cells”, Journal of Physical Chemistry Letters, 6 2355 (2015).

번호 제목 날짜 조회 수
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 1091526
478 <June 14(Wed.) 4:30 PM> Stellar core collapse: success or failure, and future probes 2017.06.08 73100
477 <12/1>21세기 관측우주론 2006.11.28 73307
476 <3/28> 양자물리학의 성립 과정 2012.03.22 73317
475 <3/2(Fri.)11:00>Evolving magnetic interactions near a Kondo breakdown 2018.02.27 73379
474 <7/2> Dyonic Instanton and Its Higgs Structures 2008.07.01 73619
473 <8/2(Thu.) 2:00pm>Status of multifractional theories 2018.07.24 73673
472 <12/2(화)> Emergent Quantum Phenomena in SrTiO3 Heterostructures 2014.11.21 73936
471 <6/1> 암흑물질 탐색 2007.05.28 73976
470 <9/7> On Dark Matter and its indirect detection with box-shaped gamma-rays 2012.09.05 74077
469 <11/20> 마침내 발견된 신의 입자: 힉스 보존 2013.11.14 74325
468 <5/1> Supersymmetry Breaking in Chern-Simons-matter Theories 2012.04.30 74392
467 <5/9> Searching for 5th dimension 2012.05.03 74637
466 <Sep. 16(Wed.) 4:30 PM> Watching molecular targets in living bodies: the cutting edge in clinical medicine 2015.09.09 74723
465 <11/24>생물계의 물리학적 연구: 단분자 생물물리학과 세포 역학 연구 2006.11.21 74821
464 <10/11(Tue.) 15:00>Analysis of Individual Terrestrial Gamma-ray Flashes 2016.10.10 74921
463 <2/7>Emergent p-wave Kondo Coupling in Multi-Orbital Bands with Mirror Symmetry Breaking 2013.02.06 75109
462 THINKING PHYSICS 발표회 2009.03.16 75247
461 <March 8(Tue) 18:00> Unsolved puzzles of Gamma-Ray Bursts 2016.03.03 75263
460 <3/30> Extreme Energy, Extreme Universe (Search for Ultra High Energy Particles in Space) 2007.03.26 75571
459 <March. 16(Wed.) 4:30 PM> 초고속반도체의 블랙다이아몬드™,low-k 2016.03.10 75681