Facile fabrication of highly efficient ETL-free perovskite solar cells with 20% efficiency by defect passivation and interface engineering

Chun Huang; Peng Lin; Nianqing Fu; Chang Liu; Baomin Xu; Kaiwen Sun; Danyang Wang; Xierong Zeng; Shanming Ke

doi:10.1039/C9CC00312F

Facile fabrication of highly efficient ETL-free perovskite solar cells with 20% efficiency by defect passivation and interface engineering†

Chun Huang,^ab Peng Lin,

^a Nianqing Fu,

*^c Chang Liu,

^d Baomin Xu,

^d Kaiwen Sun,^e Danyang Wang,

^f Xierong Zeng^a and Shanming Ke*^ag

Author affiliations

* Corresponding authors

^a Shenzhen Key Laboratory of Special Functional Materials, Shenzhen Engineering Laboratory for Advance Technology of Ceramics, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, P. R. China

^b Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, P. R. China

^c School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China
E-mail: msnqfu@scut.edu.cn

^d Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518060, P. R. China

^e School of Photovoltaic and Renewable Energy Engineering, University of New South Wales, Sydney 2052, New South Wales, Australia

^f School of Materials Science and Engineering, University of New South Wales, Sydney 2052, New South Wales, Australia

^g School of Materials Science and Engineering, Nanchang University, Nanchang 330031, Jiangxi, P. R. China
E-mail: ksm@ncu.edu.cn

Abstract

Tetramethylammonium hydroxide (TMAH) is employed to modify the surface and electrical properties of fluorine-doped tin oxide (FTO) electrodes in perovskite solar cells. Synchronously, owing to the flow of unbound TMA⁺ ions into the perovskite, the trap density of the perovskite overlayer is largely reduced. Conductivity of the grain boundaries in the perovskite layer is also greatly increased. A high efficiency of 20.1% along with a reduced J–V hysteresis in our champion perovskite solar cells without electron transport layers is achieved.

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Article information

DOI: https://doi.org/10.1039/C9CC00312F
Article type: Communication
Submitted: 14 Jan 2019
Accepted: 05 Feb 2019
First published: 06 Feb 2019

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Chem. Commun., 2019,55, 2777-2780

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Facile fabrication of highly efficient ETL-free perovskite solar cells with 20% efficiency by defect passivation and interface engineering

C. Huang, P. Lin, N. Fu, C. Liu, B. Xu, K. Sun, D. Wang, X. Zeng and S. Ke, Chem. Commun., 2019, 55, 2777 DOI: 10.1039/C9CC00312F

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Chemical Communications

Facile fabrication of highly efficient ETL-free perovskite solar cells with 20% efficiency by defect passivation and interface engineering†

Abstract

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Facile fabrication of highly efficient ETL-free perovskite solar cells with 20% efficiency by defect passivation and interface engineering

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