journal article·2023-07

A 0D Additive for Flexible All‐Inorganic Perovskite Solar Cells to Go Beyond 60 000 Flexible Cycles

Huijing Liu, Huifang Han, Jia Xu, Xu Pan, Kui Zhao, Shengzhong (Frank) Liu, Jianxi Yao

Advanced Materials· Volume 35· Issue 28
Publisher page

Abstract

Abstract All‐inorganic cesium lead halide flexible perovskite solar cells (f‐PSCs) exhibit superior thermal stability compared to their organic–inorganic hybrid counterparts. However, their flexibility and efficiency are still below‐par for practical viability. Herein, a design using a 0D Cs4Pb(IBr)6 additive to transform tensile stress into compressive stress in the perovskite film, effectively preventing expansion of cracks for significantly improved mechanical durability, is reported. It is found that not only is improved flexibility obtained, but also the cell efficiency is increased for the all‐inorganic flexible 3D CsPbI3−xBrx solar cells. The CsPbI2.81Br0.19 f‐PSC retains over 97% of its initial efficiency even after 60 000 flexing cycles at a curvature radius of 5 mm (R = 5 mm). Simultaneously, 0D Cs4Pb(IBr)6 enhances the crystallinity of the CsPbI2.81Br0.19 film and passivates the defects along the grain boundaries, effectively improving the photovoltaic performance of the all‐inorganic f‐PSCs. The highest power‐conversion efficiency obtained is 14.25% with a short‐circuit current density of 18.47 mA cm−2, open‐circuit voltage of 1.09 V, and fill factor of 70.67%. This strategy paves the way for further improvement of the mechanical durability of all‐inorganic f‐PSCs.
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Research context

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Quantum Dots Synthesis And Properties

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

Affiliations

State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources Beijing Key Laboratory of Energy Safety and Clean Utilization North China Electric Power University No. 2 Beinong Road, Changping District Beijing 102206 P. R. China

Key Laboratory of Photovoltaic and Energy Conservation Materials Institute of Solid‐State Physics Hefei Institutes of Physical Science Chinese Academy of Sciences No. 350, Shushan Lake Road Hefei 230031 P. R. China

Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science & Engineering Shaanxi Normal University No. 620, West Chang'an Avenue Xi'an 710119 P. R. China

Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Dalian Institute of Chemical Physics Chinese Academy of Sciences No. 457, Zhongshan Road Dalian Liaoning 116023 P. R. China

Funding

National Natural Science Foundation of China

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