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Improving the fill factor of N2200-based all polymer solar cells by introducing EPPDI as a solid additive
Affiliation:1. Center for Advanced Low-dimension Materials, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China;2. Institute of Polymer Optoelectronic Materials & Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhu, 510640, China;1. School of Electronics Engineering, VIT University, Vellore 632014, Tamil Nadu, India;2. Carbon Dioxide and Green Technologies Centre, VIT University, Vellore 632014, Tamil Nadu, India;1. School of Material and Chemistry Engineering, Xuzhou University of Technology, Xuzhou, 221018, China;2. Key Laboratory for Organic Electronics and Information Displays, Institute of Adv Mater (IAM), Nanjing University of Posts & Telecommunications, Nanjing, 210023, China;1. State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, China;2. University of the Chinese Academy of Sciences, No.19A Yuquan Road, Beijing 100049, China;3. Institute of High Energy Physics, Chinese Academy of Sciences (CAS), Beijing 100049, China;4. Dongguan Neutron Science Center, No. 1, Zhongziyuan Road, Dalang, Dongguan 523803, China;1. Key Laboratory of Polar Materials and Devices, Department of Optoelectronics, East China Normal University, 200241, Shanghai, PR China;2. Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi, 030006, PR China;3. Institute of Functional Nano & Soft Materials, Soochow University, Suzhou, 215123, PR China;4. School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, 200025, PR China;5. School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200025, PR China;6. Jiangsu Key Laboratory for Carbon-Based Functional Materials & Device, Soochow University, Suzhou, 215123, PR China;7. Department of Physics, Chemistry and Biology, IFM, Linköping University, SE-58183, Linköping, Sweden;1. College of Chemistry/Institute of Polymers and Energy Chemistry (IPEC), Nanchang University, Nanchang 330031, Jiangxi, China;2. Institute of Advance Scientific Research (iASR), Jiangxi Normal University, 99 Ziyang Avenue, Nanchang 330022, Jiangxi, China;3. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials & College of Materials Science and Engineering, Donghua University, Shanghai 201620, China;1. Key Laboratory of Luminescence and Optical Information, Ministry of Education, Beijing Jiaotong University, 100044 Beijing, People’s Republic of China;2. Organic Optoelectronic Materials Laboratory, Department of Chemistry, College of Science, Korea University, 02841 Seoul, Republic of Korea;3. Key Laboratory for Special Functional Materials, Ministry of Education, National and Local Joint Engineering Research Center for High-Efficiency Display and Lighting Technology, School of Materials, Henan University, 475004 Kaifeng, People’s Republic of China
Abstract:A cheap and commercially available small molecule (namely EPPDI) is introduced to the active layer of N2200-based all polymer solar cells as a solid additive. EPPDI at the optimal ratio can improve the D-A nano-scale morphology and reduce trap density of the active layer by filling morphological spaces. As a result, the photovoltaic performance of the resulting devices based on PF2:N2200 are increased from 6.28% to 7.03% with significantly enhanced fill factor. This work demonstrates a facile approach for improving the performance of all polymer solar cells.
Keywords:All polymer solar cells  Morphology control  Solid additive  Trap density  Fill factor
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