Ternary solar cells via ternary polymer donors and third component PC71BM to optimize morphology with 13.15% efficiency. (1st July 2021)

• Record Type: Journal Article
• Authors: Liu, Xingpeng; Du, Sanshan; Fu, Zhijie; Chen, Can; Tong, Junfeng; Li, Jianfeng; Zheng, Nan; Zhang, Rongling; Xia, Yangjun
• Is Part Of: Solar energy. Volume 222(2021)
• Page Start: 18
• Page End: 26
• Publication Date: 2021-07-01
• Subjects: Polymer solar cells -- Ternary -- Morphology -- Charge transport; Solar energy -- Periodicals; Solar engines -- Periodicals; 621.47
• DOI: 10.1016/j.solener.2021.05.011
• Languages: English
• ISSNs: 0038-092X

Abstract

Highlights: A PCE over the 13% for ternary PSCs based on ternary polymer donor was achieved. Morphology studies confirmed that ternaty PSC brought most appropriate phase separation. A classical ternary strategy could significantly improve charge extraction. Abstract: The third component played an increasingly significant role in polymer solar cells (PSCs), especially for the morphological impact. Here, we use a ternary polymer donor (TBFCl50-BDD) and organic small molecule acceptor (BTP-4F) as the main material and introduce a third component (PC71 BM) to enhance the morphology of the photoactive layer and result in improved device performance. The TBFCl50-BDD:BTP-4F based PSCs only exhibited an efficiency of 10.58%, while The power conversion efficiency of ternary device (TBFCl50-BDD:BTP-4F:PC71 BM) reached 13.15%. Importantly, the introduction of PC71 BM can not only improve the morphology of the active layer and promote more efficient exciton transport, but also influence the molecular arrangement for better crystallization performance. This work offers an effective method for optimization of the morphology to enhance the properties of PSCs.