Polymer Fiber Rigid Network with High Glass Transition Temperature Reinforces Stability of Organic PhotovoltaicsOACSTPCDEI
Polymer Fiber Rigid Network with High Glass Transition Temperature Reinforces Stability of Organic Photovoltaics
Organic photovoltaics(OPVs)need to overcome limitations such as insufficient thermal stability to be commercialized.The reported approaches to improve stability either rely on the development of new materials or on tailoring the donor/acceptor morphology,however,exhibiting limited applicability.Therefore,it is timely to develop an easy method to enhance thermal stability without having to develop new donor/acceptor materials or donor-acceptor compatibilizers,or by introducing another third component.Herein,a unique approach is presented,based on constructing a polymer fiber rigid network with a high glass transition temperature(Tg)to impede the movement of acceptor and donor molecules,to immobilize the active layer mor-phology,and thereby to improve thermal stability.A high-Tg one-dimensional aramid nanofiber(ANF)is utilized for network construction.Inverted OPVs with ANF net-work yield superior thermal stability compared to the ANF-free counterpart.The ANF network-incorporated active layer demonstrates significantly more stable morphology than the ANF-free counterpart,thereby leaving fundamental processes such as charge separation,transport,and collection,determining the device efficiency,largely unaltered.This strategy is also successfully applied to other photovoltaic systems.The strategy of incorporating a polymer fiber rigid network with high Tg offers a distinct perspective addressing the challenge of thermalinstability with simplicity and universality.
Qiao Zhou;Sandra P.Gonzalez Lopez;Jiayu Wang;Meng Qin;Jianshu Li;Longbo Luo;Xiangyang Liu;Jiaqiang Qin;Shirong Lu;Lei Meng;Frédéric Laquai;Cenqi Yan;Yongfang Li;Pei Cheng;Hongxiang Li;Zhendong Zhu;Yujie Gao;Jie Xiong;Hua Tang;Can Zhu;Hailin Yu
College of Polymer Science and Engineering,State Key Laboratory of Polymer Materials Engineering,Sichuan University,Chengdu 610065,People's Republic of ChinaKAUST Solar Center,Physical Science and Engineering Division,King Abdullah University of Science and Technology(KAUST),Thuwal,Kingdom of Saudi ArabiaDepartment of Material Science and Technology,Taizhou University,Taizhou 318000,People's Republic of ChinaBeijing National Laboratory for Molecular Sciences,CAS Key Laboratory of Organic Solids,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,People's Republic of China
Inverted organic photovoltaicsThermal stabilityAramid nanofibersMorphology controlCharge carrier dynamics
《纳微快报（英文）》 2024 (011)
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This work was financially supported by the Sichuan Science and Technology Program(Grant Nos.2023YFH0087,2023YFH0085,2023YFH0086,and 2023NSFSC0990),State Key Laboratory of Polymer Materials Engineering(Grant Nos.sklpme2022-3-02 and sklpme2023-2-1 1),and Tibet Foreign Experts Program(Grant No.2022wz002).This work was carried out with the support of the Shanghai Synchrotron Radiation Facility(SSRF),beamline BL02U2 and BL16B1.The authors thank SSRF BL02U2 for 2D GIWAXS measurements and SSRF BL16B1 for 2D GISAXS measurements.This publication is based upon work supported by the King Abdullah University of Science and Technology(KAUST)Office of Research Administra-tion(ORA)under Award Nos.OSR-CARF/CCF-3079 and OSR-2021-CRG10-4701.The authors thank Analytical & Testing Center Sichuan University for steady fluorescence spectroscopy.
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