Yadagiri, Bommaramoni and Narayanaswamy, Kamatham and Rao, Ravulakollu Srinivasa and Bagui, Anirban and Datt, Ram and Gupta, Vinay and Singh, Surya Prakash (2018) D-pi-A-pi-D Structured Diketopyrrolopyrrole-Based Electron Donors for Solution-Processed Organic Solar Cells. Journal of Materials Chemistry C , 3 (10). pp. 13365-13373. ISSN 2470-1343

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Abstract

Solution-processable D-pi-A-pi-D structured two organic small molecules bearing thienyl diketopyrrolopyrrole (TDPP) and furanyl diketopyrrolopyrrole (FDPP) as central acceptor units and cyano on the pi-bridge and phenothiazine as the terminal donor units, coded as TDPP-PTCN and FDPP-PTCN, are designed and synthesized. The CH arylation and Suzuki coupling protocols have been adopted for synthesizing the molecules. Solution-processed organic solar cells (OSCs) were constructed with these molecules as the donors and phenyl-C-71-butyric acid methyl ester as the acceptor yielding power conversion efficiencies (PCE) of 4.0% for FDPP-PTCN and 5.2% for TDPP-PTCN, which is the highest PCE reported so far from the small molecular DPP-phenothiazine-based architecture for solution-based OSCs. The effect of heteroatom substitution on thermal stability and optoelectronic and photovoltaic performances is also systematically investigated herein. This work demonstrates that replacement of oxygen with sulfur in these kinds of small molecules remarkably improves the photovoltaic performance of OSCs.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Royal Society of Chemistry.
Subjects:	Chemistry
Divisions:	UNSPECIFIED
Depositing User:	Mr. Yogesh Joshi
Date Deposited:	22 Aug 2019 11:27
Last Modified:	22 Aug 2019 11:27
URI:	http://npl.csircentral.net/id/eprint/3983

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