High-efficiency inverted polymer solar cells via dual effects of introducing the high boiling point solvent and the high conductive PEDOT:PSS layer |
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| Affiliation: | 1. Materials & Engineering Research Institute, Sheffield Hallam University, City Campus, Howard Street, Sheffield S1 1WB, UK;2. Department of Engineering Materials, University of Sheffield, Mappin Street, Sheffield S1 3JD, UK;1. Department of Electronics Engineering, Dankook University, Cheonan-si 330-714, Chungnam, Republic of Korea;2. Corporate Technology Division, POSCO, Daechi 4-dong, Gangnam-gu, Seoul 135-777, Republic of Korea;3. School of Mechatronics Engineering, Korea University of Technology and Education, Cheonan-si 330-708, Chungnam, Republic of Korea;1. Printable Electronics Research Center, Collaborative Innovation Center of Suzhou Nano Science and Technology, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, 398 Ruoshui Road, SEID SIP, Suzhou, Jiangsu 215123, PR China;2. Nano Science and Technology Institute, Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China, 166 Ren Ai Road, SEID SIP, Suzhou, Jiangsu 215123, PR China;3. Department of Chemistry, Xi’an Jiaotong Liverpool University, 111 Ren Ai Road, SEID SIP, Suzhou, Jiangsu, 215123, PR China |
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| Abstract: | Polymer solar cells (PSCs) are of great interest in the past decade owing to their potentially low-cost in the manufacturing by the solution-based roll to roll method. In this paper, a novel inverted device structure was introduced by inserting a high conductive PEDOT:PSS (hcPEDOT:PSS) layer between the Au nanoparticles (NPs)-embedded hole transport layer (PEDOT:PSS) and the top electrode layer. Power conversion efficiency (PCE) initially reached up to 4.51%, illustrating ～10% higher compared with the device similarly enhanced by Au NPs plasmonics where only one PEDOT:PSS layer with the embedded Au NPs was used in single bulk heterojunction inverted PSCs based on the poly(3-hexylthiophene):6,6]-phenyl C61-butyric acid methylester (P3HT:PCBM). The PCE was further improved from 4.51% to 5.01% by adding the high-boiling point solvent of 1,8-diiodooctane (DD) into the active layer, presenting ～20% enhancement in PCE through dual effects of introducing the high boiling point solvent and the high conductive PEDOT:PSS layer. Morphologies of the active layers were characterised by SEM and AFM separately in the paper. |
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| Keywords: | Inverted structures Polymer photovoltaic devices Plasmonic P3HT:PCBM |
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