Polymer solar cells based low bandgap A1-D-A2-D terpolymer based on fluorinated thiadiazoloquinoxaline and benzothiadiazole acceptors with energy loss less than 0.5 eV |
| |
| Affiliation: | 1. Institute of Organoelement Compounds of the Russian Academy of Sciences, Vavilova St., 28, 119991, Moscow, Russian Federation;2. Carl von Ossietzky University of Oldenburg, 26129, Oldenburg, Germany;3. Department of Photonics, National Chiao Tung University, Hsinchu, Taiwan, 300, Taiwan, ROC;4. Nanotechnology and Advanced Materials Laboratory, Department of Chemical Engineering, University of Patras, Patras, 26500 GR, Greece;5. Molecular Engineering Laboratory, Department of Physics, University of Patras, Patras, 26500 GR, Greece;6. Department of Physics, The LNM Institute for Information Technology (Deemed University), Jamdoli, Jaipur, India;1. Department of Electrical and Electronic Engineering, Bangladesh University of Engineering and Technology, Dhaka, 1205, Bangladesh;2. Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, BC, V6T1Z4, Canada;1. Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo 315201, PR China;2. University of Chinese Academy of Sciences, Beijing 100049, PR China;1. Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China;2. College of Chemistry and Chemical Engineering, Shanxi Datong University, Datong 037009, China;1. Department of Materials Science and Engineering, College of Engineering, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University, Beijing 100871, China;2. Department of Chemistry, Capital Normal University, Beijing 100048, China;1. Department of Chemistry Education, Institute of Fusion Science, Div. of Science Education, Chonbuk National University, 567 Baekje-ro, Jeonju 561-756, Republic of Korea;2. Professional Graduate School of Flexible and Printable Electronics, Polymer Materials Fusion Research Center, Chonbuk National University, 567 Baekje-ro, Jeonju 561-756, Republic of Korea;3. Department of Chemistry, Dongguk University-Seoul, Seoul 100-715, Republic of Korea;1. State Key Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China;2. University of Chinese Academy of Sciences, Beijing 100049, PR China |
| |
| Abstract: | We synthesized an ultra low bandgap terpolymer denoted as P containing fluorinated-fluorene attached thiadiazoloquinoxaline and benzothiadiazole acceptors and thiophene as donor in its backbone and investigated its optical and electrochemical properties. This terpolymer is used for as donor along with PC71BM as electron acceptor in solution processed polymer solar cells (PSCs). The P showed a shows strong absorption band from 650 nm to 1100 nm with an optical bandgap of 1.12 eV and highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energy levels of ?5.25 eV and ?3.87 eV, respectively. After the optimization of P to PC71BM weight ratio, the optimized weight ratio 1:2 in chlorobenzene (CB) solution, the PSC showed overall power conversion efficiency of 4.10% (Jsc of 10.96 mA/cm2, Voc of 0.68 V and FF of 0.55). After the solvent additive (3 v% DIO) followed by subsequent thermal annealing (SA-TA) the PCE has been increased up to 7.54% with Jsc of 16.12 mA/cm2, Voc of 0.65 V and FF of 0.72. The increase in the PCE is related with the enhancement in the both Jsc and FF, attributed optimized nanoscale morphology of the active layer for both efficient exciton dissociation and charge transport towards the electrodes and balanced charge transport in the device, induced by the TSA treatment of the active layer. This is the highest PCE of PSCs with an energy loss about 0.47 eV with the low bandgap of 1.12 eV. |
| |
| Keywords: | Low bandgap terpolymer Solvent additive and thermal annealing Bulk heterojunction solar cells Power conversion efficiency |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
