| 학회 | 한국공업화학회 |
| 학술대회 | 2020년 가을 (10/28 ~ 10/30, 광주 김대중컨벤션센터(Kimdaejung Convention Center)) |
| 권호 | 24권 1호 |
| 발표분야 | 포스터-에너지저장·변환 |
| 제목 | Observation of unexpected secondary phases in CZTSe solar cell using Raman spectroscopy |
| 초록 | Raman spectroscopy is a widely used tool to detect secondary phases in Cu2ZnSnSSe4 (CZTSSe) solar cells without damaging samples. Since a small amount of the secondary phases can cause a performance drop in CZTS/Se solar cell devices, identifying secondary phases is important. Since Raman signals are highly sensitive to the existence of secondary phases using the resonance Raman effect, it is possible to detect a small amount of secondary phases in the solar cell. We carried out Raman spectroscopy with four lasers as excitation energies. We observed unusual secondary phases, ZnO and S/Se alloy in our CZTSSe absorber layer. ZnO is usually used as an n-type TCO layer in CZTSe solar cells, but 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. For S/Se alloy, we compared Raman signals from S/Se alloy clusters to S and Se powders. |
| 저자 | 임수연1, Tharith Sriv1, 오지아2, 김삼미3, 김세윤3, 양기정3, 강진규3, 김대환3, 전찬욱2, 정현식1 |
| 소속 | 1서강대, 2영남대, 3대구경북과학기술원 |
| 키워드 | Solar cell; CZTSSe; Raman spectroscopy; secondary phase |
