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Research Article

Graphdiyne oxide doping for aggregation control of hole-transport nanolayer in inverted perovskite solar cells

Xu Cai1,2, Jin Tang1, Min Zhao1, Le Liu1, Zhibin Yu1, Jiajia Du1,2, Ling Bai1, Fushen Lu2, Tonggang Jiu1( ), Yuliang Li1,3( )
Science Center for Material Creation and Energy Conversion, Institute of Frontier and Interdisciplinary Science & School of Chemistry and Chemical Engineering, Shandong University, Qingdao 266237, China
Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Shantou 515063, China
Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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Graphical Abstract

Graphdiyne oxide (GDYO) is utilized to control the aggregation of poly[3-(4-carboxylbutyl) thiophene-K (P3CT-K). With enhanced charge transfer, enlarged grain size, and optimized morphology, the device performance of the inverted perovskite solar cells is improved.

Abstract

The strong aggregation tendency of hole transport material poly[3-(4-carboxylbutyl) thiophene-K (P3CT-K) restricts its further application in inverted perovskite solar cells (PSCs). Here, we report an effective strategy to address this issue and achieve the superior performance of inverted methylammonium lead triiodide (MAPbI3) PSCs, in which graphdiyne oxide (GDYO) doped P3CT-K nanocomposites are applied as the hole transport nanolayer (HTL). It is revealed that the strong π–π stacking interaction occurs between GDYO and P3CT-K, which is proved by the blue shift of the absorption peak of P3CT-K nanolayer. The aggregation control via GDYO contributes to the property improvement of P3CT-K HTL. Moreover, the homogeneous coverage induces the growth of perovskite grain with larger size than that based on the undoped one. As a result, the optimized surface morphology, enhanced conductivity, charge extraction as well as better crystal quality, finally improve the device performance. An optimal power conversion efficiency of 19.06% is achieved, with simultaneously improved fill factor and short circuit current density. This work presents the potential of functional graphdiyne (GDY) in the development of highly efficient photovoltaic device.

Keywords

graphdiyne oxideperovskite solar cellshole transport layeraggregation controlcarriers transfer

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Nano Research
Volume 15 Issue 11,
November 2022
Pages 9734-9740
DOI: 10.1007/s12274-022-4187-8
Cite this article:
Cai X, Tang J, Zhao M, et al. Graphdiyne oxide doping for aggregation control of hole-transport nanolayer in inverted perovskite solar cells. Nano Research, 2022, 15(11): 9734-9740. https://doi.org/10.1007/s12274-022-4187-8
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Received: 10 December 2021
Revised: 22 January 2022
Accepted: 24 January 2022
Published: 02 March 2022
© Tsinghua University Press 2022
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