| 학회 |
한국고분자학회 |
| 학술대회 |
2022년 봄 (04/06 ~ 04/08, 대전컨벤션센터) |
| 권호 |
47권 1호 |
| 발표분야 |
분자전자 부문위원회 |
| 제목 |
Enhancing Performance and Stability of Tin Halide Perovskite Light Emitting Diodes via Coordination Engineering of Lewis Acid–Base Adducts |
| 초록 |
For resolving toxicity issues of Pb-based perovskites, the Sn-based perovskites have been widely studied as a promising candidate to replace Pb-based perovskites due to the similar valence electron configuration between Sn2+ and Pb2+. However, the desired Sn2+ in the precursor solution and film is easily oxidized to Sn4+ to cause detrimental Sn vacancies and impurities in the films. Herein, we propose N,N′-dimethylpropyleneurea (DMPU) as an alternative Lewis base for the fabrication of stable and high quality Sn-based perovskite thin films. We unraveled that the strongly coordinating Lewis base DMPU can suppress oxidation of Sn2+ in the precursor solution while promoting growth of uniform and highly crystalline perovskite thin films. The perovskite light emitting diode (PeLED) device based on the PEA2SnI4 demonstrated maximum L and EQE of 68.84 cd/m2 and 0.361%, respectively. |
| 저자 |
김선권1, 장호진2, 이주홍2, 조새벽1, 호동해1, 명재민1, 이준엽2, 이진욱2, 조정호1
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| 소속 |
1연세대, 2성균관대 |
| 키워드 |
tin perovskite; lead-free perovskite; PeLED
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| E-Mail |
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