| 학회 |
한국재료학회 |
| 학술대회 |
2015년 봄 (05/14 ~ 05/15, 구미코) |
| 권호 |
21권 1호 |
| 발표분야 |
C. 에너지 재료 |
| 제목 |
Synthesis of wurtzite CZTS NCs and their transformation into kesterite CZTSSe absorber layer for solar cell application |
| 초록 |
The quaternary indium and gallium-free copper chalcogenide, Cu2ZnSnS4 (CZTS) has driven much attention for its potential application in low-cost and sustainable solar cells. Here, we demonstrate a synthetic strategy for CZTS NCs and their by a fabrication of CZTSSe thin films with outstanding absorbing characteristics. In particular, pure phase metastable wurtzite CZTS NCs are synthesized by using environmentally benign polyol mediated technique. Furthermore, a scalable low-cost, binder free ink formulation process without the ligands exchange is developed using ethanol as a solvent with highly dispersed CZTS NCs. The wurtzite-derived CZTS NCs films are observed to undergo a phase transformation to a kesterite upon selenization at different temperatures ranging from 520 oC to 580 oC under Se vapor pressure in rapid thermal annealing (RTA). Results indicated that the increase in lattice parameters and slightly decrease the band gaps in the sulfo selenized CZTSSe thin film. Thus, the systematic changes have been observed in the sulfo-selenized CZTSSe thin films. The solar cell device fabricated using CZTS thin film selenized at optimized temperature of 520oC exhibited a better solar cell performance. |
| 저자 |
Uma Ghorpade1, Mahesh Suryawanshi2, Chang woo Hong3, Jong-Ha Moon4, Jin Hyeok Kim1, Sanjay Kolekar2, Ji hye Gwak3
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| 소속 |
1Department of Materials Science and Engineering and Optoelectronics Convergence Research Centre, 2Chonnam National Univ., 3Gwangju 500-757, 4South Korea |
| 키워드 |
Wurtzite Cu2ZnSnS4 (CZTS); ink formulation; phase transformation; CZTSSe solar cell
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| E-Mail |
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