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Thienopyrroledione and benzodithiophene/thiophene-based random terpolymer for polymer solar cells with improved fill factor
- Thienopyrroledione and benzodithiophene/thiophene-based random terpolymer for polymer solar cells with improved fill factor
- Bang, S.-M.[Bang, Su Mi]; Park, J.-H.[Park, Jung Hyun]; Kang, S.[Kang, Sung Kyoung]; Lee, Y.-S.[Lee, You Sun]; Lim, B.[Lim, Bo Gyu]; eo, H.[Heo, Hyo Jung]; Lee, J.[Lee, Jae Chol]; Lee, Y.[Lee, Youn Gu]; Na, S.-I.[Na, Seok In]
- DGIST Authors
- eo, H.[Heo, Hyo Jung]
- Issue Date
- Dyes and Pigments, 140, 229-235
- Article Type
- Bulk-Heterojunction (Bhj); Electron-Accepting Units; Electron-Donating; Fill-Factor; Heterojunctions; Highest Occupied Molecular Orbital; Improved Fill Factor; Molecular Orbitals; Organic Polymers; Phase Separation; Photovoltaic Property; Polymer Solar Cell (PSC); Polymer Solar Cells (PSCs); Polymers; Power Conversion Efficiencies; Random Polymer; Solar Cells; Terthiophene; Terthiophenes
- A new random conjugated terpolymer, coded as LGC-D054, was designed and synthesized. It is composed of N-alkylthieno[3,4-c]pyrrole-4,6-dione (TPD) as an electron-accepting unit, and benzodithiophene (BDT) and terthiophene as electron-donating units into the polymer backbone. The optical, electrochemical, and photovoltaic properties of the terpolymer were investigated. The polymer displayed an optical bandgap of 1.81 eV, with a highest occupied molecular orbital (HOMO) level of −5.25 eV. The bulk-heterojunction (BHJ) polymer solar cell (PSC) with the blend film based on LGC-D054:PC71BM exhibited a power conversion efficiency (PCE) of 4.46% with the short circuit current density (Jsc) of 8.71 mA/cm2 and a relatively high fill factor (FF) of 61.21%. After introducing 1,8-diiodooctane (DIO), BHJ film showed better phase separation and larger domain size. Furthermore, this optimized morphology promotes improved hole and electron mobilities, leading to a promising PCE of 5.08% with improved Jsc of 9.08 mA/cm2 and high FF of 66.02%. © 2017 Elsevier Ltd
- Elsevier Ltd
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