| 학회 |
한국공업화학회 |
| 학술대회 |
2019년 가을 (10/30 ~ 11/01, 제주국제컨벤션센터(ICC JEJU)) |
| 권호 |
23권 2호 |
| 발표분야 |
포스터_에너지저장·변환 |
| 제목 |
Abnormal charge carrier transport in highly efficient Cu2ZnSn(S,Se)4 absorber thin-films on flexible Mo-foil substrates |
| 초록 |
Cu2ZnSn(S,Se)4 (CZTSSe) thin films were grown by sulfo-selenization of pure-metal precursors sputtered on flexible Mo-foil, whose power conversion efficiency (PCE) over 10%. So far, the best PCE of CZTSSe solar cells on glass substrates is 12.6%. In this study, high-efficient CZTSSe thin films were probed by scanning probe microscopy. Combined with micro-Raman, conductive atomic force microscopy and Kelvin probe force microscopy can indicate optoelectrical properties of the kesterite thin-film surfaces. Unlike Cu(In,Ga)Se2 and conventional CZTSSe thin films on glass, flexible CZTSSe thin films were grown in relatively low temperature. Thus, defect states whose formation energy is relatively low can be formed near grain boundaries. Their energy level can be deep, which can be severe carrier recombination centers and cannot be appropriate current flow path. By comprehendingthe optoelectronic properties of the materials, we can expect better performance of CZTSSe thin-film solar cells. |
| 저자 |
김주란1, 조윌렴1, 양기정2, 김대환2, 강진규2
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| 소속 |
1이화여자대, 2대구경북과학기술원 |
| 키워드 |
Kesterite; CZTSSe; Kelvin probe method
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| E-Mail |
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