High performance inverted perovskite solar cells using PEDOT:PSS/KCl hybrid hole transporting layer |
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| Affiliation: | 1. State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, PR China;2. School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, PR China;3. Centre for Advanced Analytical Science, c/o School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, 510006, PR China;1. Energy-Saving Building Materials Collaborative Innovation Center of Henan Province, Xinyang Normal University, 237 Nanhu Road, Xinyang, 464000, China;2. College of Physics and Electronic Engineering, Xinyang Normal University, 237 Nanhu Road, Xinyang, 464000, China;3. Solar Energy Research Institute of Singapore (SERIS), National University of Singapore (NUS), 117574, Singapore;1. Department of Photonics, National Cheng Kung University, 70101, Tainan, Taiwan, ROC;2. Department of Greenergy, National University of Tainan, Tainan, 700, Taiwan, ROC;1. Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, PR China;2. Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, PR China;3. University of Chinese Academy of Sciences, Beijing 100049, PR China;4. College of Science, Changchun University, Changchun 130022, PR China |
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| Abstract: | PEDOT:PSS is one of the most widely used hole transporting layer for inverted perovskite solar cells. Yet the performances of the corresponding perovskite solar cells are not satisfactory. Here, we demonstrate that KCl modified PEDOT:PSS film can promote the crystallization of perovskite film and enlarge the perovskite crystals. At the same time, KCl can diffuse into the perovskite film and effectively passivate the defects. As a result, inverted perovskite solar cells fabricated on 10 mg mL?1 PEDOT:PSS/KCl films exhibit an average power conversion efficiency of 16.24 %, which is enhanced by 17.77 % compared with the reference perovskite solar cells. Open circuit voltage of 1.009 V and power conversion efficiency of 17.09 % have also been demonstrated using the optimized 10 mg mL?1 PEDOT:PSS/KCl films. |
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| Keywords: | Inverted perovskite solar cells PEDOT:PSS Potassium chloride Defect passivation Charge carrier recombination |
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