All‐Carbon‐Electrode‐Based Endurable Flexible Perovskite Solar Cells |
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| Authors: | Qiang Luo He Ma Qinzhi Hou Yingxiang Li Jing Ren Xuezeng Dai Zhibo Yao Yu Zhou Lichen Xiang Huayun Du Hongcai He Ning Wang Kaili Jiang Hong Lin Huaiwu Zhang Zhanhu Guo |
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| Affiliation: | 1. State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, P. R. China;2. College of Applied Sciences, Beijing University of Technology, Beijing, P. R. China;3. State Key Laboratory of Low‐Dimensional Quantum Physics, Tsinghua‐Foxconn, Nanotechnology Research Center, Department of Physics, Collaborative Innovation, Center of Quantum Matter, Tsinghua University, Beijing, P. R. China;4. State Key Laboratory of New Ceramics & Fine Processing, School of Material Science and Engineering, Tsinghua University, Beijing, P. R. China;5. The Key Laboratory of Material Processing and Mold of Ministry of Education, Zhengzhou University, Zhengzhou, P. R. China;6. Integrated Composites Laboratory (ICL), Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, TN, USA;7. State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, P. R. China |
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| Abstract: | Endured, low‐cost, and high‐performance flexible perovskite solar cells (PSCs) featuring lightweight and mechanical flexibility have attracted tremendous attention for portable power source applications. However, flexible PSCs typically use expensive and fragile indium–tin oxide as transparent anode and high‐vacuum processed noble metal as cathode, resulting in dramatic performance degradation after continuous bending or thermal stress. Here, all‐carbon‐electrode‐based flexible PSCs are fabricated employing graphene as transparent anode and carbon nanotubes as cathode. All‐carbon‐electrode‐based flexible devices with and without spiro‐OMeTAD (2,2′,7,7′‐tetrakis‐(N,N‐di‐p‐methoxyphenylamine)‐9,9′‐spirobifluorene) hole conductor achieve power conversion efficiencies (PCEs) of 11.9% and 8.4%, respectively. The flexible carbon‐electrode‐based solar cells demonstrate superior robustness against mechanical deformation in comparison with their counterparts fabricated on flexible indium–tin oxide substrates. Moreover, all carbon‐electrode‐based flexible PSCs also show significantly enhanced stability compared to the flexible devices with gold and silver cathodes under continuous light soaking or 60 °C thermal stress in air, retaining over 90% of their original PCEs after 1000 h. The promising durability and stability highlight that flexible PSCs are fully compatible with carbon materials and pave the way toward the realization of rollable and low‐cost flexible perovskite photovoltaic devices. |
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| Keywords: | carbon materials conductivity flexibility perovskite solar cells stability |
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