| 학회 | 한국공업화학회 |
| 학술대회 | 2019년 가을 (10/30 ~ 11/01, 제주국제컨벤션센터(ICC JEJU)) |
| 권호 | 23권 2호 |
| 발표분야 | 포스터_에너지저장·변환 |
| 제목 | Observation of ZnO secondary phase in CZTSe solar cell |
| 초록 | Raman spectroscopy is a powerful tool to detect secondary phases in Cu2ZnSnSe4 (CZTSe) solar cells without destruction of the samples. It is possible to detect a small amount of secondary phases in CZTSe by using the resonance Raman effect. Since the secondary phases can lead to unexpected behavior in CZTSe solar cell and a small amount of the secondary phases can cause a performance drop in solar cell devices, identifying secondary phases is important. We carried out resonance Raman spectroscopy with four lasers with excitation energies of 1.96 eV, 2.41 eV, 2.81 eV, and 3.82 eV, which are similar to the bandgap of common secondary phases such as SnSe2, SnSe and ZnSe. We observed unusual ZnO as a secondary phase in our dimpled CZTSe absorber layer. Although ZnO is usually used as n-type TCO layer in CZTSe solar cell, a ZnO layer was not initially deposited on our absorber layer. Additionally, we found that ZnO can be formed when high power UV laser is irradiated on CZTSe. |
| 저자 | 임수연1, Tharith Sriv1, 오지아2, 전찬욱2, 정현식1 |
| 소속 | 1서강대, 2영남대 |
| 키워드 | CZTSe; solar cell; Secondary phase |
