| 학회 |
한국공업화학회 |
| 학술대회 |
2021년 봄 (05/12 ~ 05/14, 부산 벡스코(BEXCO)) |
| 권호 |
25권 1호 |
| 발표분야 |
[디스플레이] 차세대 고성능 전자재료 및 소자 |
| 제목 |
The role of a mixed-salt for passivating surface of halide perovskite |
| 초록 |
Non-radiative recombination is a major limit in obtaining efficient metal-halide perovskite photovoltaics. A mixture of a new ammonium salt, CF3(CF2)2CH2NH3I (HBAI), and a conventional formamidinium halide (FAX) is used for the surface passivation on top of the 3D perovskite bulk film. The employment of the passivation layer not only effectively suppresses charge recombination by passivating the surface traps of the 3D perovskite film but also builds a well-matched energy alignment at the interface of perovskite/HTM, leading to a power conversion efficiency (PCE) of over 23% mainly due to a substantial VOC improvement (above 80 mV in average). The passivation layer indeed plays an important role in ensuring the long-term stability based on the decreased trap density as well as an increased moisture-resistance. It is found that the internal interaction between the two salts is responsible for the overall observed beneficial effects. |
| 저자 |
김희선 |
| 소속 |
인하대 |
| 키워드 |
perovskite; solar cell; recombination
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| E-Mail |
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