Pyran-annulated perylene diimide derivatives as non-fullerene acceptors for high performance organic solar cells. Issue 41 (8th October 2018)

• Record Type: Journal Article
• Authors: Li, Gang; Zhang, Yu; Liu, Tao; Wang, Shuaihua; Li, Dandan; Li, Jiewei; Li, Fengting; Yang, Lian-Ming; Luo, Zhenghui; Yang, Chuluo; Yan, He; Hao, Pin; Shang, Qiaoyan; Tang, Bo
• Is Part Of: Journal of materials chemistry. Volume 6:Issue 41(2018)
• Page Start: 11111
• Page End: 11117
• Publication Date: 2018-10-08
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c8tc02823k
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : Through the coupling of acetylene substituted triphenylamine and pyran-annulated perylene diimides, two novel non-fullerene electron acceptors, coded asTPA-PDI2 andTPA-PDI3, were designed, synthesized and applied in BHJ organic solar cells. Abstract : There has been growing interest in the effectual strategy of constructing non-fullerene acceptors for organic solar cells that may overcome the defect of traditional fullerene-based acceptors. Herein, two novel push–pull (acceptor–donor–acceptor) type small-molecule acceptors, that is, TPA-PDI2 andTPA-PDI3, with triphenylamine (TPA ) as the core unit and pyran-annulated perylene diimides (Py-PDIs ) as peripheral groups are designed and synthesized for non-fullerene organic solar cells (OSCs). After device optimization, OSCs based onTPA-PDI3 demonstrate good device performance with a power conversion efficiency (PCE) as high as 5.84%, surpassing theTPA-PDI2 -based counterparts fabricated under identical conditions (1.314% PCE). The high efficiency forTPA-PDI3 can be attributed to the complementary absorption spectra with the donor material (PBDB-T ), balanced carrier transport and favorable morphologies. To the best of our knowledge, this PCE of 5.84% is among the highest values based on ethynyl-functionalizedTPA -shaped non-fullerene acceptors so far.