Temperature-Reliable Low-Dimensional Perovskites Passivated Black-Phase CsPbI3 toward Stable and Efficient Photovoltaics

Shan Tan; Bingcheng Yu; Yuqi Cui; Fanqi Meng; Chunjie Huang; Yiming Li; Zijing Chen; Huijue Wu; Jiangjian Shi; Yanhong Luo; Dongmei Li; Qingbo Meng

doi:10.1002/anie.202201300

Temperature-Reliable Low-Dimensional Perovskites Passivated Black-Phase CsPbI₃ toward Stable and Efficient Photovoltaics

Angew Chem Int Ed Engl. 2022 Jun 7;61(23):e202201300. doi: 10.1002/anie.202201300. Epub 2022 Apr 5.

Authors

Shan Tan^{1

2}, Bingcheng Yu^{1

3}, Yuqi Cui^{1

4}, Fanqi Meng⁵, Chunjie Huang^{1

2}, Yiming Li^{1

3}, Zijing Chen^{1

4}, Huijue Wu¹, Jiangjian Shi¹, Yanhong Luo^{1

6

4}, Dongmei Li^{1

6

4}, Qingbo Meng^{1

7

4}

Affiliations

¹ Key Laboratory for Renewable Energy, Chinese Academy of Sciences (CAS), Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Beijing, 100190, China.
² College of Materials Science and Opto-Electronic Technology, University Chinese Academy of Sciences, Beijing, 100049, China.
³ Center for Clean Energy (CCE), Institute of Physics, Chinese Academy of Sciences, Beijing, 101407, China.
⁴ Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China.
⁵ State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China.
⁶ School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China.
⁷ Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China.

PMID: 35243747
DOI: 10.1002/anie.202201300

Abstract

Low-dimensional (LD) perovskites can effectively passivate and stabilize 3D perovskites for high-performance perovskite solar cells (PSCs). Regards CsPbI₃ -based PSCs, the influence of high-temperature annealing on the LD perovskite passivation effect has to be taken into account due to fact the black-phase CsPbI₃ crystallization requires high-temperature treatment, however, which has been rarely concerned so far. Here, the thermal stability of LD perovskites based on three hydrophobic organic ammonium salts and their passivation effect toward CsPbI₃ and the whole device performance, have been investigated. It is found that, phenyltrimethylammonium iodide (PTAI) and its corresponding LD perovskites exhibit excellent thermal stability. Further investigation reveals that PTAI-based LD perovskites are mainly distributed at grain boundaries, which not only enhances the phase stability of CsPbI₃ but also effectively suppresses non-radiative recombination. As a consequence, the champion PSC device based on CsPbI₃ exhibits a record efficiency of 21.0 % with high stability.

Keywords: CsPbI3; Low-Dimensional Perovskites; Passivation; Solar Cells; Thermally Stable.

Abstract

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