| 학회 |
한국재료학회 |
| 학술대회 |
2020년 가을 (11/18 ~ 11/20, 휘닉스 제주 섭지코지) |
| 권호 |
26권 1호 |
| 발표분야 |
C. 에너지 재료 분과 |
| 제목 |
Improving open circuit voltage (Voc) deficit characteristic in CZTSSe based thin film solar cell |
| 초록 |
Recently, kesterite-based thin-film solar cells (TFSCs) have gained significant attention in the photovoltaic (PV) sector for their elemental earth abundancy and low toxicity. The present work highlights information about surface potential of bulk and GB interface studied through composition variation. With an increase in Sn content, the absorber morphology improved with the formation of larger grain along. Further, the formation of SnSe2 along with [ZnCu + VCu] A-type defect cluster is observed validated through Raman analysis. The secondary ion mass spectroscopy analysis reveals the altered distribution of sulfur (S) and sodium with different compositions along with higher accusation near-surface with increasing Sn content. Thus, the outcome of increased density of defect along with accumulation of S near interface give the larger difference in GB and grain interior (GI) accelerating the carrier separation. At an optimum compositional ratio of Cu/(Zn+Sn) = ~0.6, the power conversion efficiency (PCE) is significantly improved from 8% to 11%. The device with optimal deposition time and compositional ratio exhibits a PCE of 11.04% with record open circuit voltage (Voc) deficit of 537 mV. |
| 저자 |
Karade Vijay Chandrakant, 김진혁
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| 소속 |
전남대 |
| 키워드 |
CZTSSe; Solar cell; KPFM; SIMS; VOc dificit
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| E-Mail |
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