Non-fullerene small molecule acceptors with three-dimensional thiophene/selenophene-annulated perylene diimides for efficient organic solar cells. Issue 20 (21st April 2020)

• Record Type: Journal Article
• Authors: Pan, Jiawei; Wang, Ling; Chen, Wei; Sang, Shenglong; Sun, Hua; Wu, Bo; Hang, Xiao-Chun; Sun, Zhengyi; Huang, Wei
• Is Part Of: Journal of materials chemistry. Volume 8:Issue 20(2020)
• Page Start: 6749
• Page End: 6755
• Publication Date: 2020-04-21
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d0tc00341g
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : Three-dimensional non-fullerene acceptors with a spiro core linked with S/Se fused perylene diimides possess appropriate energy levels, twisted molecular configuration and high carrier mobility, leading to a PCE of 6.95% for organic solar cells. Abstract : New three-dimensional non-fullerene small molecule acceptors were synthesized with the structure of a spiro core, 4, 4′-spirobi[cyclopenta[2, 1- b ;3, 4- b ′]dithiophene] (SCPDT) linked with S/Se fused perylene diimides (PDIs). The three-dimensional structure suppresses the aggregation of PDIs and the formation of excessively large crystalline domains. The well-conjugated structure and electron-rich property of the spiro core give rise to high electron mobility, making for more balanced carrier transport. The introduction of S/Se aromatic rings leads to appropriate energy levels and more twisted molecular configurations. Organic solar cells based on the PBDB-T-S:SCPDT-PDI4 -S bulk heterojunction exhibit a high power conversion efficiency of 6.95% along with a high V oc of 1.00 V, a J sc of 11.72 mA cm −2 and a fill factor of 59.27%.