Volume 21, Issue 24 2501410
Research Article

Vacuum-Evaporated Perovskite and Interfacial Modifier for Efficient Perovskite Solar Cells

Yiran Ye

Yiran Ye

Department of Electrical Engineering, Tsinghua University, Beijing, 100084 China

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Boxin Jiao

Boxin Jiao

Department of Electrical Engineering, Tsinghua University, Beijing, 100084 China

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Minghao Li

Minghao Li

Department of Electrical Engineering, Tsinghua University, Beijing, 100084 China

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Liguo Tan

Liguo Tan

Department of Electrical Engineering, Tsinghua University, Beijing, 100084 China

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Jianqiao Zhao

Jianqiao Zhao

School of Materials Science and Engineering, Tsinghua University, Beijing, 100084 China

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Hang Li

Hang Li

Department of Electrical Engineering, Tsinghua University, Beijing, 100084 China

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Ningyu Ren

Ningyu Ren

Department of Electrical Engineering, Tsinghua University, Beijing, 100084 China

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Ruihao Su

Ruihao Su

Department of Electrical Engineering, Tsinghua University, Beijing, 100084 China

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Daniel Prochowicz

Daniel Prochowicz

Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, Warsaw, 01–224 Poland

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Yue Liu

Yue Liu

Department of Electrical Engineering, Tsinghua University, Beijing, 100084 China

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Mohan Ding

Mohan Ding

Department of Electrical Engineering, Tsinghua University, Beijing, 100084 China

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Weipeng Wang

Weipeng Wang

School of Materials Science and Engineering, Tsinghua University, Beijing, 100084 China

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Zhengjun Zhang

Zhengjun Zhang

School of Materials Science and Engineering, Tsinghua University, Beijing, 100084 China

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Yu Chen

Yu Chen

Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100043 China

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Chenyi Yi

Corresponding Author

Chenyi Yi

Department of Electrical Engineering, Tsinghua University, Beijing, 100084 China

E-mail: [email protected]

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First published: 02 May 2025

Abstract

Surface passivation of the perovskite layer is crucial for enhancing the photovoltaic performance of perovskite solar cells (PSCs). Vacuum evaporation is a scalable solvent-free method for depositing a uniform and homogenous thin layer with better control of film thickness. While the use of the vacuum-deposition method to obtain high-quality perovskite thin films is recently adapted, the evaporation of organic additives for surface passivation of the perovskite layer has not been widely studied. In this work, a vacuum evaporation method is introduced to uniformly deposit a novel multifunctional organic salt, 2-chlorophenethylamine pentafluorobenzene sulfonate (2-ClPEAPf), onto a perovskite surface. It is observed that 2-ClPEAPf not only effectively passivates the interfacial defects but also prevents moisture invasion into the perovskite film. As a result, planar n–i–p PSCs exhibit maximum PCE up to 25.16% with an aperture area of 0.1 cm2 and PCE of 24.00% (certified) on an active area of 1.0 cm2. In addition, the 0.1 cm2 device with vacuum-evaporated 2-ClPEAPf reveals enhanced operational stability maintaining 92.5% of its initial efficiency after 800 hours of continuous light irradiation.

Conflict of Interest

A relevent patent has been applied.

Data Availability Statement

The data that support the findings of this study are available from the corresponding[1] author upon reasonable request.

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