| Autor: |
Xiaofeng Huang, Guocheng Deng, Shaoqi Zhan, Fang Cao, Fangwen Cheng, Jun Yin, Jing Li, Binghui Wu, Nanfeng Zheng |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
ACS central science. 8(7) |
| ISSN: |
2374-7943 |
| Popis: |
Research on solvent chemistry, particularly for halide perovskite intermediates, has been advancing the development of perovskite solar cells (PSCs) toward commercial applications. A predictive understanding of solvent effects on the perovskite formation is thus essential. This work systematically discloses the relationship among the basicity of solvents, solvent-contained intermediate structures, and intermediate-to-perovskite alpha-FAPbI(3) evolutions. Depending on their basicity, solvents exhibit their own favorite bonding selection with FA(+) or Pb2+ cations by forming either hydrogen bonds or coordination bonds, resulting in two different kinds of intermediate structures. While both intermediates can be evolved into alpha-FAPbI(3) below the delta-to-alpha thermodynamic temperature, the hydrogen-bond-favorable kind could form defect-less alpha-FAPbI(3) via sidestepping the break of strong coordination bonds. The disclosed solvent gaming mechanism guides the solvent selection for fabricating high-quality perovskite films and thus high-performance PSCs and modules. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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