Graphdiyne: Bridging SnO2 and Perovskite in Planar Solar Cells

Suicai Zhang; Haonan Si; Wenqiang Fan; Mingyue Shi; Minghua Li; Chenzhe Xu; Zheng Zhang; Qingliang Liao; Abdul Sattar; Zhuo Kang; Yue Zhang

doi:10.1002/anie.202003502

Graphdiyne: Bridging SnO₂ and Perovskite in Planar Solar Cells

Angew Chem Int Ed Engl. 2020 Jul 6;59(28):11573-11582. doi: 10.1002/anie.202003502. Epub 2020 May 7.

Authors

Suicai Zhang^{1

2}, Haonan Si^{1

2}, Wenqiang Fan^{1

2}, Mingyue Shi^{1

2}, Minghua Li², Chenzhe Xu^{1

2}, Zheng Zhang^{1

2}, Qingliang Liao^{1

2}, Abdul Sattar^{1

2}, Zhuo Kang^{1

2}, Yue Zhang^{1

2}

Affiliations

¹ Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Advanced Energy Materials and Technologies, University of Science and Technology Beijing, Beijing, 100083, China.
² State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China.

PMID: 32259338
DOI: 10.1002/anie.202003502

Abstract

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 SnO₂ 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 SnO₂ and perovskite regarding electron extraction rate optimization and interface engineering towards both perovskite crystallization process and subsequent photovoltaic service duration. The GDY doped SnO₂ 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.

Keywords: SnO2; graphdiyne; interface modification; perovskite; solar cells.

Abstract

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