DataVXAdvanced Functional MaterialsPaper
journal article·2022-09

Defect‐Dependent Crystal Plane Control on Inorganic CsPbBr3 Film by Selectively Anchoring (Pseudo‐) Halide Anions for 1.650 V Voltage Perovskite Solar Cells

Jingwei Zhu, Benlin He, Wenyu Zhang, Rui Tui, Haiyan Chen, Yanyan Duan, Hao Huang, Jialong Duan, Qunwei Tang

Advanced Functional Materials· Volume 32· Issue 39
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Source abstract

Abstract

Abstract One of the key problems to improving the performance of a typical perovskite solar cell (PSC) is to minimize the defect‐determined nonradiative recombination. So far, the cutting‐edge strategies mainly focus on the film‐scale defect manipulation at grain boundaries and surfaces by trial‐and‐error, but the intrinsic passivation mechanism and fundamental guideline in the perspective of crystal lattices are still unclear. Herein, a much lower defect formation energy of PbBr antisite defect at (110) plane than that at (h00) planes is demonstrated by theoretically studying the crystal plane‐dependent defect density in an inorganic CsPbBr3 film, and then the authors precisely control the plane growth by selectively anchoring (pseudo‐) halide anions from ionic liquids to (110) plane. Because of the different adsorption energies on various planes, the growth of defective (110) plane is suppressed, leading to the formation of (h00) plane‐oriented film. Finally, the all‐inorganic CsPbBr3 PSC passivated by ionic liquid EMImCl delivers the best efficiency of 10.71% with an open‐circuit voltage up to 1.650 V. This work provides an in‐depth insight into defect formation and passivation mechanism to stabilize perovskite photovoltaics.
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Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties · Chalcogenide Semiconductor Thin Films

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Materials Science and Engineering Ocean University of China 238 Songling Road Qingdao 266100 P. R. China

State Centre for International Cooperation on Designer Low‐Carbon and Environmental Material (SCICDLCEM) School of Materials Science and Engineering Zhengzhou University Zhengzhou 450001 P. R. China

Guangxi Key Laboratory of Processing for Non‐ferrous Metals and Featured Materials School of Resources Environment and Materials Guangxi University Nanning 530004 P. R. China

College of Chemical and Biological Engineering Shandong University of Science and Technology Qingdao 266590 P. R. China

College of Information Science and Technology Jinan University 601 Huangpu Avenue West Guangzhou 510632 P. R. China

Funding

National Key Research and Development Program of China · National Natural Science Foundation of China · Natural Science Foundation of Shandong Province · Natural Science Foundation of Guangdong Province · Fundamental Research Funds for the Central Universities

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