| Autor: |
Hao Li, Haoyu Shi, Qin Tan, Guocong Chen, Jiafeng Wang, Guoqiang Ma, Dong He, Tianle Cheng, Han Gao, Lamberti, Francesco, Zhubing He |
| Zdroj: |
Journal of Materials Chemistry A; 6/14/2024, Vol. 12 Issue 22, p13097-13105, 9p |
| Abstrakt: |
Tin halide perovskite solar cells (PSCs) show promise as lead-free photovoltaic alternatives, but face challenges due to Sn2+ oxidation and crystallization control issues. We introduce a novel method to enhance PSC performance: by reducing tin tetraiodide with elemental tin, we produce a highly reactive Sn2+ precursor solution, yielding perovskite films with improved crystallinity, smoother surfaces, and reduced Sn4+ residue. Additionally, we incorporate phenylhydrazine-4-sulfonic acid (PHPA) as an additive to further enhance film quality. PHPA synergically forms hydrogen bonds with formamidiniumcations (FA+) and coordinates with Sn2+ to inhibit its oxidation, reducing defective states within the film. This results in an FASnI3 perovskite device achieving a remarkable PCE of 12.22%. Notably, the device maintains 80% of its initial PCE after 200 h under light-soaking. Our approach offers a reproducible method for fabricating highperformance and stable tin halide PSCs, addressing key challenges and advancing sustainable energy solutions. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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