A pentacyclic S,N-heteroacene based electron acceptor with strong near-infrared absorption for efficient organic solar cells
- 21 June 2019
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Chemical Communications
- Vol. 55 (49), 7057-7060
- https://doi.org/10.1039/c9cc03536b
Abstract
A novel non-fullerene acceptor-donor-acceptor (A-D-A) structured small molecule acceptor material with fused ring N-alkyl dithieno[3,2-b:2 ',3 '-d]pyrrole (DTP) as the central donor unit and ((2-(5,6-difluoro-)3-oxo-2,3-dihydro-1H-inden-1-ylidene)malononitrile) (EG-2F) as the terminal acceptor units, named DTP-C-17-4F, was designed and synthesized. DTP-C-17-4F demonstrates strong near-infrared absorption, suitable energy levels, a good film morphology and high electron mobility, resulting in an outstanding short-circuit current density of 21.17 mA cm(-2) without additives for organic photovoltaics.Funding Information
- National Natural Science Foundation of China (51573042, 51873007, 21835006)
- Fundamental Research Funds for the Central Universities (2016YQ06, 2018MS032, 2017MS027, 2018ZD07, 2017XS084)
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