| 학회 |
한국고분자학회 |
| 학술대회 |
2019년 가을 (10/09 ~ 10/11, 제주컨벤션센터) |
| 권호 |
44권 2호 |
| 발표분야 |
분자전자 부문위원회 II |
| 제목 |
Study on Hot Carrier Relaxation and Extraction of Pb-Sn Binary Perovskites |
| 초록 |
Pb-Sn binary perovskites have gained tremendous research interest due to their lower toxicity, lower optical band gap (~ 1.20 eV) compared to the Pb counterparts. However, understanding of the fundamental carrier dynamics on these materials is unsatisfactory contrary to the well-studied Pb counterparts. In this study, hot carrier photophysics of the Pb-Sn binary perovskites and how they could be utilized in the photovoltaic system have been investigated by using femtosecond Transient Absorption Spectroscopy (TAS). Long-lived hot carrier dynamics with much slower average cooling lifetime (~ 50 ps) were observed, in comparison with the previously reported Pb counterparts. Moreover, to examine the extraction of the hot carrier, the electron transporting layer with high-lying lowest unoccupied molecular orbital was introduced upon perovskite films. Theses results provide possible implementation of perovskite hot carrier solar cells, paving the way for optimized charge extraction processes. |
| 저자 |
김홍기1, 이종우2, 한기림2, 김성근2, 오준학2
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| 소속 |
1포항공과대, 2서울대 |
| 키워드 |
Pb-Sn Binary Perovskite; Hot Carrier; Transient Absorption Spectroscopy
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| E-Mail |
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