A cyclopentadithiophene-bridged small molecule acceptor with near-infrared light absorption for efficient organic solar cells. Issue 14 (12th March 2019)

• Record Type: Journal Article
• Authors: Yi, Yuan-Qiu-Qiang; Feng, Huanran; Ke, Xin; Yan, Jing; Chang, Meijia; Wan, Xiangjian; Li, Chenxi; Chen, Yongsheng
• Is Part Of: Journal of materials chemistry. Volume 7:Issue 14(2019)
• Page Start: 4013
• Page End: 4019
• Publication Date: 2019-03-12
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c9tc00162j
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : A cyclopentadithiophene (DTC)-bridged acceptor–donor–acceptor (A–D–A) backboned small molecule acceptor (SMA), namelyIDTC-4Cl, was designed and synthesized. Abstract : A cyclopentadithiophene (DTC)-bridged acceptor–donor–acceptor (A–D–A) backboned small molecule acceptor (SMA), namelyIDTC-4Cl, was designed and synthesized. In combination with strong electron-withdrawing (5, 6-dichloro-3-oxo-2, 3-dihydro-1 H -indene-2, 1-diylidene)dimalononitrile as a terminal group, IDTC-4Cl exhibits a near-infrared light absorption with an edge over 900 nm. UsingPBDB-T as the polymer donor, theIDTC-4Cl based device gives a PCE of 9.51% with a V oc of 0.822 V, FF of 60.2% and J sc of 19.14 mA cm −2 . Upon introduction of PC71 BM as the third component, the ternary OSCs show an enhanced PCE of 10.41% with a much improved FF of 65.6%, which exemplifies the potential of utilizing a DTC unit to construct an SMA for high-performance organic photovoltaics.