Efficient polymer solar cells based on the synergy effect of a novel non-conjugated small-molecule electrolyte and polar solvent. Issue 7 (26th January 2016)

• Record Type: Journal Article
• Authors: Liu, Zhiyang; Ouyang, Xinhua; Peng, Ruixiang; Bai, Yongqi; Mi, Dongbo; Jiang, Weigang; Facchetti, Antonio; Ge, Ziyi
• Is Part Of: Journal of materials chemistry. Volume 4:Issue 7(2016)
• Page Start: 2530
• Page End: 2536
• Publication Date: 2016-01-26
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c5ta10083f
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : The power conversion efficiencies of polymer solar cells were largely improved by introducing a non-conjugated small-molecule electrolyte as a cathode interlayer. Abstract : A novel non-conjugated small-molecule electrolyte was invented as a cathode interlayer in PTB7:PC71 BM-based polymer solar cells (PSCs). We discovered a significant synergy effect for improving the device efficiency between methanol treatment and the interlayer. The methanol treatment mainly contributed to the open-circuit voltage, while the interlayer primarily enhanced the short-circuit current and fill factor. Under the effective synergy effect, power conversion efficiencies (PCEs) of PTB7:PC71 BM-based PSCs were largely improved from 3.89% to 9.79% for conventional PSCs and from 7.34% to 9.10% for inverted PSCs. Our findings create a new path of interfacial modification for highly efficient PSCs.