Graphdiyne: Bridging SnO 2 and Perovskite in Planar Solar Cells

The matching of charge transport layer and photoactive layer is critical in solar energy conversion devices, especially for planar perovskite solar cells based on the SnO electron-transfer layer (ETL) owing to its unmatched photogenerated electron and hole extraction rates. Graphdiyne (GDY) with mul...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2020-07, Vol.59 (28), p.11573-11582
Main Authors: Zhang, Suicai, Si, Haonan, Fan, Wenqiang, Shi, Mingyue, Li, Minghua, Xu, Chenzhe, Zhang, Zheng, Liao, Qingliang, Sattar, Abdul, Kang, Zhuo, Zhang, Yue
Format: Article
Language:English
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Summary:The matching of charge transport layer and photoactive layer is critical in solar energy conversion devices, especially for planar perovskite solar cells based on the SnO electron-transfer layer (ETL) owing to its unmatched photogenerated electron and hole extraction rates. Graphdiyne (GDY) with multi-roles has been incorporated to maximize the matching between SnO and perovskite regarding electron extraction rate optimization and interface engineering towards both perovskite crystallization process and subsequent photovoltaic service duration. The GDY doped SnO layer has fourfold improved electron mobility due to freshly formed C-O σ bond and more facilitated band alignment. The enhanced hydrophobicity inhibits heterogeneous perovskite nucleation, contributing to a high-quality film with diminished grain boundaries and lower defect density. Also, the interfacial passivation of Pb-I anti-site defects has been demonstrated via GDY introduction.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.202003502