Effects of Oxygen Atoms Introduced at Different Positions of Non-Fullerene Acceptors in the Performance of Organic Solar Cells with Poly(3-hexylthiophene).

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ID: 81882
2020
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Abstract
With the development of large-area fabrication technologies for organic solar cells (OSCs), poly(3-hexylthiophene) (P3HT) is the best choice as a photovoltaic donor polymer because it can be easily synthesized in the scale of kilograms at low cost. However, non-fullerene acceptors (NFAs) matching with P3HT for high performance OSCs are very rare. Herein, by introducing oxygen atoms into the side chains or the fused-ring core of indaceno[1,2-:5,6-']dithiophene, we synthesized two new A-A-D-A-A type NFAs, where benzotriazole (BTA) and 2-(1,1-dicyanomethylene)rhodanine were used as the bridged A and terminal A, respectively. The final NFAs, named BTA43 and BTA53, show wider absorption spectra and enhanced intermolecular/intramolecular interaction in comparison with their analogue BTA3 without oxygen atoms. The photovoltaic devices based on P3HT:BTA43 and P3HT:BTA53 can achieve a high power conversion efficiency of 6.56 and 6.31%, respectively, which are obviously higher than that of BTA3 (5.64%). Our results provide a simple and effective strategy to design promising NFAs to pair with the classic photovoltaic polymer P3HT.
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xiao2020effectsacs Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Xiao, Bo;Du, Mengzhen;Wang, Xiaochen;Xiao, Zuo;Li, Gongqiang;Tang, Ailing;Ding, Liming;Geng, Yanfang;Sun, Xiangnan;Zhou, Erjun;
Journal ACS applied materials & interfaces
Year 2020
DOI
10.1021/acsami.9b16662
URL
Keywords
molecular engineering photovoltaic organic solar cells p3ht non-fullerene acceptors

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