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Polymerization Strategies to Construct a 3D Polymer Passivation Network toward High Performance Perovskite Solar Cells |
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| Authors: | Dachang Liu Dr Xiao Wang Xianzhao Wang Bingqian Zhang Xiuhong Sun Zhipeng Li Dr Zhipeng Shao Prof Sui Mao Dr Li Wang Prof Guanglei Cui Prof Shuping Pang |
| Institution: | 1. Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101 P. R. China;2. Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101 P. R. China
Shandong Energy Institute, Qingdao, 266101 P. R. China These authors contributed equally to this work. Contribution: Formal analysis (equal), Investigation (equal), Writing - review & editing (supporting);3. Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101 P. R. China Shandong Energy Institute, Qingdao, 266101 P. R. China Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049 P. R. China Contribution: Investigation (supporting), Methodology (equal);4. College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, 266042 P. R. China Contribution: Methodology (supporting);5. Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101 P. R. China Shandong Energy Institute, Qingdao, 266101 P. R. China Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049 P. R. China Contribution: Methodology (supporting);6. Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101 P. R. China Shandong Energy Institute, Qingdao, 266101 P. R. China Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049 P. R. China Contribution: Investigation (supporting);7. Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101 P. R. China Shandong Energy Institute, Qingdao, 266101 P. R. China Contribution: Investigation (supporting);8. College of Materials Science and Engineering, Qingdao University, Qingdao, 266071 P. R. China Contribution: Methodology (supporting);9. College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, 266042 P. R. China Contribution: Investigation (supporting);10. Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101 P. R. China Shandong Energy Institute, Qingdao, 266101 P. R. China Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049 P. R. China Contribution: Funding acquisition (supporting), Methodology (equal), Writing - review & editing (equal) |
| Abstract: | The spontaneously formed uncoordinated Pb2+ defects usually make the perovskite films demonstrate strong n-type with relatively lower carrier diffusion length and serious non-radiative recombination energy loss. In this work, we adopt different polymerization strategies to construct three-dimensional passivation frameworks in the perovskite layer. Thanks to the strong C≡N⋅⋅⋅Pb coordination bonding and the penetrating passivation structure, the defect state density is obviously reduced, accompanied by a significant increase in the carrier diffusion length. Additionally, the reduction of iodine vacancies also changed the Fermi level of the perovskite layer from strong n-type to weak n-type, which substantially promotes the energy level alignment and carrier injection efficiency. As a result, the optimized device achieved an efficiency exceeded 24 % (the certified efficiency is 24.16 %) with a high open-circuit voltage of 1.194 V, and the corresponding module achieved an efficiency of 21.55 %. |
| Keywords: | Acrylonitrile Passivation Perovskites Polymerization Solar Cells |