Influence of the surface treatment of PEDOT:PSS layer with high boiling point solvent on the performance of inverted planar perovskite solar cells |
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| Affiliation: | 1. State Key Laboratory of Electrical Insulation and Power Equipment, Xi''an Jiaotong University, Xi''an, Shan''xi 710049, PR China;2. Printable Electronics Research Centre, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Collaborative Innovation Center of Suzhou Nano Science and Technology, No. 398 Ruoshui Road, SEID, SIP, Suzhou, Jiangsu 215123, PR China;3. Institute of Functional Nano & Soft Materials, Soochow University, Collaborative Innovation Center of Suzhou Nano Science and Technology, No. 199 Renai Road, SEID, SIP, Suzhou, Jiangsu 215123, PR China;1. Research Center for New Generation Photovoltaics, National Central University, Taoyuan 32001, Taiwan, ROC;2. Deaprtment of Optics and Photonics, National Central University, Taoyuan 32001, Taiwan, ROC;3. Institute of Chemistry, Academia Sinica, Taipei 11529, Taiwan, ROC;4. Material and Chemical Research Laboratories, Industrial Technology Research Institute, Hsinchu 31040, Taiwan, ROC;5. Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei 10608, Taiwan, ROC;6. Department of Applied Chemistry, National Chi Nan University, Nantou 545, Taiwan, ROC;7. Department of Chemistry, National Central University, Taoyuan 32001, Taiwan, ROC;1. Instituto de Investigación en Comunicación Óptica, Universidad Autónoma de San Luis Potosí, Álvaro Obregón 64, San Luis Potosí 78000, Mexico;2. Advanced Materials Department, IPICYT, Camino a la Presa San José 2055, Col. Lomas 4a Sección, San Luis Potosí 78216, Mexico;1. Xinyu Institute of New Energy, Xinyu University, Xinyu 338004, China;2. Department of Materials Science and Mechanical Engineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh 15261, USA;1. State Key Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing, 100871, PR China;2. Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, Peking University, Beijing, 100871, PR China;3. Dongguan NO. 6 Senior High School, Dongguan, 523420, PR China;4. Co-Innovation Center for Micro/Nano Optoelectronic Materials and Devices, Chongqing University of Arts and Sciences, Yongchuan, Chongqing, 402160, PR China;5. New Display Device and System Integration Collaborative Innovation Center of the West Coast of the Taiwan Strait, Fuzhou, 350002, PR China;1. College of Energy, Soochow Institute for Energy and Materials InnovationS & Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou, 215006, China;2. Laboratory for New Fiber Materials and Modern Textile, Growing Base for State Key Laboratory, College of Chemical Engineering, Qingdao University, Qingdao, 266071, China;3. Laboratory of Advanced Optoelectronic Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China;1. Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea;2. Department of Chemistry, Center for Superfunctional Materials, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, South Korea;3. Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, 790-784, Republic of Korea;4. Research Institute of Advanced Materials, BK21 PLUS SNU Materials Division for Educating Creative Global Leaders, Nano System Institute (NSI), Institute of Engineering Research, Research Institute of Advanced Materials, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea |
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| Abstract: | Since perovskite precursor solution is typically prepared from high boiling point solvents, understanding the effect of high boiling point solvent treatment of the PEDOT:PSS layer on the performance of perovskite solar cells is important for device processing optimization. In this paper, influence of the surface treatment of the PEDOT:PSS layer with high boiling point solvent, including N,N-dimethylformamide (DMF), dimethyl sulfoxide (DMSO), and ethylene glycol (EG), on the device performance of the perovskite solar cells was investigated. Increased conductivity was measured for the PEDOT:PSS film after solvent treatments, which was ascribed to the partial removal of PSS component from the PEDOT:PSS layer, as evidenced by the UV–vis absorption spectroscopy and XPS spectroscopy. In comparison with the reference cell, poorer device performance was obtained for the perovskite solar cells directly deposited on the solvent washed PEDOT:PSS film, which was ascribed to the increased pin hole density of the perovskite films. However, insertion of a thin PSSNa layer between the PEDOT:PSS layer and the perovskite layer greatly improved device performance, demonstrating that PSS-rich surface is favorite for the crystal growth of the perovskite film. Increased external quantum efficiency over 600–750 nm was measured for the cells based on solvent treated PEDOT:PSS layer, leading to a short circuit current and the consequent performance enhancement. |
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| Keywords: | Perovskite solar cells PEDOT:PSS surface treatment High boiling point solvent Surface properties Performance enhancement |
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