Ion-Dipole Interaction Enabling Highly Efficient CsPbI3 Perovskite Indoor Photovoltaics

Kai-Li Wang; Haizhou Lu; Meng Li; Chun-Hao Chen; Ding- Bo Zhang; Jing Chen; Jun-Jie Wu; Yu-Hang Zhou; Xue-Qi Wang; Zhen-Huang Su; Yi-Ran Shi; Qi-Sheng Tian; Yu-Xiang Ni; Xing-Yu Gao; Shaik M Zakeeruddin; Michael Grätzel; Zhao-Kui Wang; Liang-Sheng Liao

doi:10.1002/adma.202210106

Ion-Dipole Interaction Enabling Highly Efficient CsPbI₃ Perovskite Indoor Photovoltaics

Adv Mater. 2023 Aug;35(31):e2210106. doi: 10.1002/adma.202210106. Epub 2023 Jun 28.

Authors

Kai-Li Wang¹, Haizhou Lu², Meng Li³, Chun-Hao Chen¹, Ding- Bo Zhang⁴, Jing Chen¹, Jun-Jie Wu¹, Yu-Hang Zhou¹, Xue-Qi Wang¹, Zhen-Huang Su⁵, Yi-Ran Shi¹, Qi-Sheng Tian¹, Yu-Xiang Ni⁴, Xing-Yu Gao⁵, Shaik M Zakeeruddin², Michael Grätzel², Zhao-Kui Wang¹, Liang-Sheng Liao^{1

6}

Affiliations

¹ Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215123, P. R. China.
² Prof. Michael Grätzel, Laboratory of Photonics and Interfaces, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, CH-1015, Switzerland.
³ Key Lab for Special Functional Materials, Ministry of Education, School of Materials Science and Engineering, and Collaborative Innovation Center of Nano Functional Materials and Applications, Henan University, Kaifeng, 475004, P. R. China.
⁴ School of Physical Science and Technology, Southwest Jiaotong University, Chengdu, 610031, P. R. China.
⁵ Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Shanghai Institute of Applied Physics Chinese Academy of Sciences, Shanghai, 201204, P. R. China.
⁶ Macao Institute of Materials Science and Engineering, Macau University of Science and Technology, Taipa, Macau SAR, 999078, P. R. China.

PMID: 37286198
DOI: 10.1002/adma.202210106

Abstract

Metal halide perovskites are ideal candidates for indoor photovoltaics (IPVs) because of their easy-to-adjust bandgaps, which can be designed to cover the spectrum of any artificial light source. However, the serious non-radiative carrier recombination under low light illumination restrains the application of perovskite-based IPVs (PIPVs). Herein, polar molecules of amino naphthalene sulfonates are employed to functionalize the TiO₂ substrate, anchoring the CsPbI₃ perovskite crystal grains with a strong ion-dipole interaction between the molecule-level polar interlayer and the ionic perovskite film. The resulting high-quality CsPbI₃ films with the merit of defect-immunity and large shunt resistance under low light conditions enable the corresponding PIPVs with an indoor power conversion efficiency of up to 41.2% (P_in : 334.11 µW cm^-2 , P_out : 137.66 µW cm^-2 ) under illumination from a commonly used indoor light-emitting diode light source (2956 K, 1062 lux). Furthermore, the device also achieves efficiencies of 29.45% (P_out : 9.80 µW cm^-2 ) and 32.54% (P_out : 54.34 µW cm^-2 ) at 106 (P_in : 33.84 µW cm^-2 ) and 522 lux (P_in : 168.21 µW cm^-2 ), respectively.

Keywords: crystallization; indoor photovoltaics; ion-dipole interaction; perovskites.

Abstract

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