Polarizing polymer solar cells based on the self-organization of a liquid crystalline polymer |
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| Affiliation: | 1. Department of Physics and State Key Laboratory for Mesoscopic Physics, Peking University, Beijing 100871, People’s Republic of China;2. Haixi Collaborative Innovation Center for New Display Devices and Systems Integration, Fuzhou University, Fuzhou 350002, People’s Republic of China;1. Low Dimensional Materials Research Centre, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia;2. Newcastle Innovation Ltd., The University of Newcastle, Callaghan, NSW 2308, Australia;1. Université de Pau et des Pays de l’Adour, IPREM (ECP, CNRS-UMR 5254), 2 Avenue Président Angot, 64053 Pau Cedex 09, France;2. Université de Pau et des Pays de l’Adour, IPREM (EPCP, CNRS-UMR 5254), 2 Avenue Président Angot, 64053 Pau Cedex 09, France;3. Université de Pau et des Pays de l’Adour, IPRA (CNRS-UMR 5142), Avenue de l’Université, BP 1155, 64013 Pau Cedex, France;4. CNRS, Institut de Chimie de Clermont – Ferrand (EP, ICCF, CNRS-UMR 6296), BP 80026, 63171 Aubière, France;5. CNRS, IPREM (EPCP, CNRS-UMR 5254), Hélioparc, 2 Avenue Président Angot, 64053 Pau Cedex 09, France;1. New Technologies – Research Center, University of West Bohemia, Univerzitni 8, 306 14 Pilsen, Czech Republic;2. Center of Excellence Geopolymer and Green Technology, School of Material Engineering, University Malaysia Perlis, 01007 Kangar, Perlis, Malaysia;1. School of Physics and Microelectronic and Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, Hunan University, Changsha 410082, China;2. Department of Electrical and Information Engineering, Hunan Institute of Engineering, Xiangtan 411101, China |
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| Abstract: | We manufactured polarizing polymer solar cells (PSCs) utilizing a liquid crystalline polymer (i.e., poly(2,5-bis(3-dodecylthiophen-2-yl)thieno[3,2-b]thiophene) (PBTTT)) as an electron donor material and a material that selectively absorbs polarized light. The oriented PBTTT films prepared using a self-organization process exhibited a high dichroic ratio of ca. 6.35 at the absorption peak. The polarizing PSCs based on oriented PBTTT–PC71BM photoactive layers exhibit an anisotropic photovoltaic effect under polarized illumination along the two orthogonal axes. The polarizing PSCs have a larger power conversion efficiency under parallel-polarized illumination than that of isotropic PV devices under unpolarized illumination. Based on picosecond fluorescent spectra, the parallel excitation produces a slower ground state recovery and a longer exciton lifetime than perpendicular excitation for PBTTT molecules in a uniaxially oriented arrangement. |
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| Keywords: | Optical anisotropy Polarizing PSCs Liquid crystalline polymer Self-organization |
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