复合SnO2-K2S ETL用于钙钛矿太阳能电池的能级调节和电子迁移率增强

IF 4.2 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Chemical Communications Pub Date : 2025-03-14 DOI:10.1039/D5CC00194C

Ruiyuan Hu, Yongjun Li, Fan Zhang, Yuhui Ma, Taomiao Wang, Fei Wang, Yonggui Sun, Xing’ao Li, Hanlin Hu and Yi Zhang

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引用次数: 0

摘要

高性能的钙钛矿太阳能电池一般是基于SnO2作为电子传输层。SnO2层对于钙钛矿的结晶和缺陷调控至关重要，对器件性能有重要影响。能级失配和氧空位是SnO2的主要挑战。此外，埋设界面（SnO2/钙钛矿）缺陷阻碍了器件的光伏性能。为了优化SnO2层，我们发现在SnO2层中加入K2S有效地调节了SnO2层的能级并占据了氧空位。此外，SnO2-K2S复合电子传递层的电子迁移率增强，界面质量也得到改善，促进了电子的高效提取和传递。此外，还降低了钙钛矿的结晶速度以获得大晶粒尺寸。埋藏界面处和钙钛矿层内的缺陷被钝化，陷阱态密度降低，载流子复合受到抑制。结果表明，基于SnO2-K2S电子传输层的器件具有较好的光电性能，功率转换效率高达23.28%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Composite SnO2–K2S ETL for energy level regulation and electron mobility enhancement in perovskite solar cells†

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Composite SnO2–K2S ETL for energy level regulation and electron mobility enhancement in perovskite solar cells†

High-performance perovskite solar cells commonly utilize SnO₂ as the electron transport layer (ETL), which is vital for perovskite crystallization and defect regulation, yet energy level mismatch, oxygen vacancies in SnO₂, and defects at the buried interface impede the device's photovoltaic performance. Therefore, we found that incorporating K₂S into the SnO₂ layer effectively regulated the energy levels and occupied oxygen vacancies, enhancing the electron mobility of the composite SnO₂–K₂S ETL and improving the interface quality to promote efficient electron extraction and transport. Consequently, the device based on SnO₂–K₂S ETL showed an enhanced photovoltaic performance with power conversion efficiency of to 23.28%.

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来源期刊

Chemical Communications 化学-化学综合

CiteScore

8.60

自引率

4.10%

发文量

2705

审稿时长

1.4 months

期刊介绍： ChemComm (Chemical Communications) is renowned as the fastest publisher of articles providing information on new avenues of research, drawn from all the world''s major areas of chemical research.