Exclusive Encapsulation Adhesive in a Neutral‐Plane Model for Ultrahigh Mechanical Stability of Flexible Perovskite Solar Cells
Abstract
Abstract The functional layers of flexible perovskite solar cells (FPSCs) are subjected to significant stress during bending, causing structural failure and declining power conversion efficiency. To alleviate stress, a neutral plane (NP) is introduced by positioning the functional layers at the center of the device, with top metal electrode encapsulated by a protective layer. However, adhesive detachment remains a critical issue during multiple bending cycles, and the underlying mechanism remains unclear. In this study, a systematic analysis of the detachment behavior in NP‐FPSC reveals that commercial adhesives with high Young's modulus and low adhesion strength struggle to withstand interlayer shear stress during bending, which triggers detachment between adhesives and electrodes. To address this issue, a crosslinkable polymer acrylated isoprene rubber (AIR) is designed with long linear polyisoprene main chain and acrylate side chains, providing high flexibility and reduced chain segment movement. AIR can be crosslinked under UV irradiation to form a stable network with ultralow Young's modulus and high adhesion strength, ensuring a strong bond between the protective layer and FPSCs, constructing stable NP‐FPSCs. The resultant NP‐FPSCs demonstrate excellent mechanical stability, retaining 92.8% of their initial efficiency after 50 000 bending cycles at a radius of 4 mm, meeting the IEC 62715‐6‐3 standards.
Article Details
Authors (16)
Tianjiao Zhang
Laboratory of Advanced Optoelectronic Materials, Suzhou Key Laboratory of Novel Semiconductor-optoelectronics Materials and Devices, State Key Laboratory of Bioinspired Interfacial Materials Science, College of Chemistry, Chemical Engineering and Materials Science
Xiaofeng Pan
1Tianjin Medical University General Hospital, Department of Hematology, Tianjin, China
Jiajia Li
Xiaohua Tang
Laboratory of Advanced Optoelectronic Materials Suzhou Key Laboratory of Novel Semiconductor‐optoelectronics Materials and Devices College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou 215123 P. R. China
Guiying Xu
Xia Lin
Chuanshuai Han
Laboratory of Advanced Optoelectronic Materials Suzhou Key Laboratory of Novel Semiconductor‐optoelectronics Materials and Devices State Key Laboratory of Bioinspired Interfacial Materials Science College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou 215123 China
Wen Liu
Tingting Xu
Shihao Huang
Hongyu Mou
Laboratory of Advanced Optoelectronic Materials, Suzhou Key Laboratory of Novel Semiconductor-optoelectronics Materials and Devices, State Key Laboratory of Bioinspired Interfacial Materials Science, College of Chemistry, Chemical Engineering and Materials Science
Yue Yin
Jialei Zheng
School of Life Science and Technology (L.Y., J.Z., A.Z., M.Y., J.M., H.Z.), ShanghaiTech University, China.
Chen Ju
Laboratory of Advanced Optoelectronic Materials, Suzhou Key Laboratory of Novel Semiconductor-optoelectronics Materials and Devices, State Key Laboratory of Bioinspired Interfacial Materials Science, College of Chemistry, Chemical Engineering and Materials Science
Jian Zhu
General Hospital of Central Theater Command of People’s Liberation Army, Medical College of Wuhan University of Science and Technology, Wuhan, China
Yaowen Li