| 학회 |
한국고분자학회 |
| 학술대회 |
2017년 봄 (04/05 ~ 04/07, 대전컨벤션센터) |
| 권호 |
42권 1호 |
| 발표분야 |
분자전자 부문위원회 I |
| 제목 |
Improving Thermal Stability of CH3NH3PbI3-xClx Perovskite Based on Molecular Additive |
| 초록 |
Tremendous developments of methylamine lead halide perovskite solar cells have been achieved within just a few years. Its remarkable properties make CH3NH3PbX3 perovskite solar cells of the promising next generation photovoltaics. Although its performance has exceeded over 20%, lack of clear understandings on perovskite solar cells is still a big obstacle. One of the problems is its poor stability. Here, we found that grain boundaries are the dominant region at which the thermal decomposition of perovskite crystals easily occurs. We added a molecular additive to the precursor of perovskite and successfully enhanced the thermal stability of CH3NH3PbI3-xClx crystal. We observed electron transfer reaction between the additive and halides in perovskite and supposed the additive chemically passivates grain boundaries, which prevents perovskite crystal from easily decomposing. Our strategy suggests a simple method to improve the thermal stability of perovskite without any loss. |
| 저자 |
박찬의, 고효민, 신동훈, 이한솔, 송규찬, 송성원, 양석주, 조길원
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| 소속 |
포항공과대 |
| 키워드 |
perovskite; thermal stability; additive
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| E-Mail |
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