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Molecular Dipole Engineering of Carbonyl Additives for Efficient and Stable Perovskite Solar Cells |
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| Authors: | Xiaoqing Jiang Bingqian Zhang Guangyue Yang Zhongmin Zhou Xin Guo Fengshan Zhang Shitao Yu Shiwei Liu Shuping Pang |
| Institution: | 1. College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042 China;2. Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101 China
College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, 266042 China These authors contributed equally to this work.;3. College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042 China These authors contributed equally to this work.;4. College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042 China;5. State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian, 116023 China;6. Shan Dong Hua Tai Paper Industry Shareholding Co., Ltd., Dongying, 257335 China;7. Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101 China |
| Abstract: | Carbonyl functional materials as additives are extensively applied to reduce the defects density of the perovskite film. However, there is still a lack of comprehensive understanding for the effect of carbonyl additives to improve device performance. In this work, we systematically study the effect of carbonyl additive molecules on the passivation of defects in perovskite films. After a comprehensive investigation, the results confirm the importance of molecular dipole in amplifying the passivation effect of additive molecules. The additive with strong molecular dipole possesses the advantages of enhancing the efficiency and stability of perovskite solar cells (PSCs). After optimization, the companion efficiency of PSCs is 23.20 %, and it can maintain long-term stability under harsh conditions. Additionally, a large-area solar cell module-modified DLBA was 20.18 % (14 cm2). This work provides an important reference for the selection and designing of efficient carbonyl additives. |
| Keywords: | Carbonyl Additives Defects Molecular Dipole Passivation Mechanism Perovskite Solar Cells |