| 학회 |
한국공업화학회 |
| 학술대회 |
2020년 가을 (10/28 ~ 10/30, 광주 김대중컨벤션센터(Kimdaejung Convention Center)) |
| 권호 |
24권 1호 |
| 발표분야 |
포스터-에너지저장·변환 |
| 제목 |
Hot Carrier Photo-Physics of Half-Mixed Pb-Sn Perovskites |
| 초록 |
Mixed Pb-Sn perovskites have attained enormous research interests due to their lower toxicity, lower optical band gap (~ 1.20 eV) contrary to the Pb counterparts. However, the fundamental photo-physics on mixed Pb-Sn perovskites were not well examined. In this letter, hot carrier (HC) photo-physics of FA0.5MA0.5Pb0.5Sn0.5I3 perovskites have been investigated for the first time, including HC relaxation and extraction by using femtosecond Transient Absorption Spectroscopy (TAS). Long-lived HCs with much slower average HC cooling lifetime (~ 21.1 ps) were observed, compared to the previously reported Pb counterparts at a comparable carrier density. Furthermore, the feasibilities for HC extraction and potential implementation of concentrator-type perovskite hot carrier solar cells were examined through TAS analysis and device characteristics. |
| 저자 |
김홍기1, 이종우2, 한기림2, 김성근2, 오준학2
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| 소속 |
1포항공과대, 2서울대 |
| 키워드 |
Hot carrier; Pb-Sn perovskite
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| E-Mail |
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