| Autor: |
Yao Wang, Shan-Ci Chen, Shuya Tai, Di Wang, Yunlong Ma, Jishan Wu, Mei-Jin Lin |
| Zdroj: |
Journal of Materials Chemistry C; 5/14/2024, Vol. 12 Issue 18, p6540-6547, 8p |
| Abstrakt: |
Surface defects induce non-radiative charge recombination and reduce the photovoltaic performance of perovskite solar cells (PSCs). To realize highly efficient and stable PSCs, surface passivation is an effective strategy to reduce defects in mixed halide perovskite films. Organic iodides have emerged as valuable candidates for perovskite surface passivation owing to their facile preparation, optimal lattice matching with perovskites, and robust defect passivation capability. Here, a novel phthalimide N-alkylammonium iodide (PAE-I) is introduced as a passivating agent for the defects on the surface of FAPbI3 perovskite films. The incorporated PAE-I layer effectively passivates interface traps and reduces non-radiative recombination, improving carrier extraction and transfer. As a result, the power conversion efficiency (PCE) of PSCs increases from 19.76% to 21.30%. Furthermore, the PAE-I-passivated PSCs without encapsulation exhibit excellent long-term stability, retaining 80% of the initial efficiency after 2400 hours under an ambient atmosphere. This work provides deep insights into the reduction of nonradiative recombination and the enhancement of device performance through the application of phthalimide as a superior and promising passivator. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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