Efficiency enhancements in non-fullerene acceptor-based organic solar cells by post-additive soaking. Issue 15 (29th March 2019)

• Record Type: Journal Article
• Authors: Choi, Hoyeon; Lee, Jihoon; Oh, Chang-Mok; Jang, Soyeong; Kim, Hyojung; Jeong, Mun Seok; Park, Sung Heum; Hwang, In-Wook
• Is Part Of: Journal of materials chemistry. Volume 7:Issue 15(2019)
• Page Start: 8805
• Page End: 8810
• Publication Date: 2019-03-29
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c9ta00468h
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Power conversion efficiency of non-fullerene acceptor-based organic solar cells based on PBDB-T : ITIC-m (1 : 1) composites has been successfully increased (from 9.6% to 12.3%) by using post-additive soaking (PAS) treatments on pristine BHJ films. Abstract : An improved efficiency of non-fullerene acceptor-based organic solar cells based on PBDB-T : ITIC-m composites has been obtained by using post-additive soaking (PAS) treatments on pristine BHJ films. The PAS-treated BHJ films show improved carrier dynamics in charge transfer and transport, leading to increased photocurrent and fill factors in the photovoltaic devices, followed by a high power conversion efficiency of 12.3%, which is an increase of 28% compared to that of the control device. We found that this superior performance predominantly resulted from improved exciton dissociation and enhanced electron transport after photoexcitation of the ITIC-m phase.