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Research Article

Indium doped CsPbI3 films for inorganic perovskite solar cells with efficiency exceeding 17%

Xiaomei Li1,2, Kaili Wang1, Femi Lgbari1, Chong Dong1, Wenfan Yang1, Chang Ma1, Heng Ma2, Zhao-Kui Wang1( ), Liang-Sheng Liao1
Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, China
Henan Province Key Laboratory of Photovoltaic Materials, College of Physics & Materials Science, Henan Normal University, Xinxiang 453007, China
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Abstract

In recent years, all-inorganic perovskite materials have set off a research boom owing to features, such as good thermal stability, suitable bandgap, and fascinating optical properties. However, the power conversion efficiency (PCE) and the ambient stability of all-inorganic perovskite solar cells still remain a challenge. Herein, we investigate the effect of the addition of InI3 into CsPbI3 film on the corresponding device. InI3 incorporation could retard the crystallization process and control the growth rate of CsPbI3 polycrystalline films, yielding a high quality film with large grains and few voids. The increment in electrostatic potential and the reduction of carrier recombination enabled the open-circuit voltage of fabricated perovskite solar cell to be increased from 0.89 to 0.99 V. The champion device delivered a power conversion efficiency of 17.09%, which is higher than 14.36% for the reference device. And the InI3-included solar cell without any encapsulation retained 77% of its original efficiency after 860 h aging at room temperature in N2 condition.

Keywords

indium dopingCsPbI3crystallization retardationstability

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Nano Research
Volume 13 Issue 8,
August 2020
Pages 2203-2208
DOI: 10.1007/s12274-020-2836-3
Cite this article:
Li X, Wang K, Lgbari F, et al. Indium doped CsPbI3 films for inorganic perovskite solar cells with efficiency exceeding 17%. Nano Research, 2020, 13(8): 2203-2208. https://doi.org/10.1007/s12274-020-2836-3
Topics:
Cesium compoundsIndiumIndium compoundsLead compoundsOptical propertiesPerovskitePerovskite solar cells

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Received: 04 February 2020
Revised: 23 April 2020
Accepted: 27 April 2020
Published: 05 August 2020
© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020
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