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 1021218
462 <April. 27(Wed.) 4:30 PM> 로봇과 함께 살아갈 미래 2016.04.22 53183
461 <4/6(Wed.) 1pm> Results from DM-Ice17 2016.04.05 73338
460 <April. 6(Wed.) 4:30 PM> Quantitative Determination of High Tc Superconductivity Mechanism 2016.03.31 111460
459 <March. 30(Wed.) 4:30 PM> Tetraneutron (four-neutron nucleus) 2016.03.24 64260
458 <March.24(Thu) 14:00> A new boson and muon g-2 2016.03.17 62564
457 <March. 23(Wed.) 4:30 PM> 조선시대의 천문시계 2016.03.17 55464
456 <March.18(Fri) 11:00> High Pressure Synthesis and Characterization of Non-Oxide Superconductors 2016.03.14 63857
455 <March. 16(Wed.) 4:30 PM> 초고속반도체의 블랙다이아몬드™,low-k 2016.03.10 69873
454 <March. 9(Wed.) 4:30 PM>가치 있는 대학 생활이란 무엇인가? file 2016.03.07 54655
453 <March 8(Tue) 18:00> Unsolved puzzles of Gamma-Ray Bursts 2016.03.03 63568
452 2016학년도 1학기 콜로퀴움 일정 2016.02.03 131856
451 <Dec.30(Wed) 16:30> Some basics about the thermoelectricity; the semi-classical Boltzmann transport approach 2015.12.24 64135
450 <Dec. 9(Wed.) 4:30 PM>Direct detection of dark matter at Underground 2015.12.03 71154
» <Dec. 2(Wed.) 4:30 PM> Next-generation solar cells for high photo-conversion efficiency 2015.11.25 90254
448 <Nov. 25(Wed.) 4:30 PM> Present and Future of OLED 2015.11.19 71334
447 <Nov. 18(Wed.) 4:30 PM> Single-molecule chemistry and spectroscopy on ultrathin insulating films 2015.11.11 152306
446 <Nov. 11(Wed.) 4:30 PM> 그래핀 산업의 현황과 전망 2015.11.09 61547
445 <Nov.13(Fri) 16:00> Kondo screening in mixed valence and heavy fermion compounds and the signatures of Nozieres’ exhaustion 2015.11.04 107950
444 <Nov. 4(Wed.) 4:30 PM> 기능성 산화물과 그래핀을 접합한 나노소자의 특성 변화 2015.10.30 59017
443 <Oct.20(Tue) 10:00-12:00> Novel quantum transport in Weyl semimetals and double-Weyl semimetals 2015.10.23 77346