Nagarjuna, P. and Bagui, Anirban and Garg, Ashish and Gupta, Vinay and Singh, Surya Prakash (2017) One-Step Synthesis of New Electron Acceptor for High Efficiency Solution Processable Organic Solar Cells. Journal of Physical Chemistry C, 121. pp. 26615-26621. ISSN 1932-7447

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Abstract

Here, we demonstrate a new fulleropyrrolidine electron acceptor coded as DIF-ful-C-60, following a one-step synthetic protocol. The absorption spectrum of DIF-ful-C-60 suggests broader absorption over PC61BM while the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energy levels of the molecule are -5.32 and -3.60 eV, respectively. The solution processed bulk-heterojunction polymer solar cells fabricated using a blend of DIF-ful-C-60 with PTB7 and PTB7-Th as electron donors show power conversion efficiencies (PCEs) of 6.8 and 8.6%, respectively, which is highest reported so far for fulleropyrrolidine type electron acceptors. In comparison, the control devices made from PTB7:PC61BM and PTB7-Th:PC61BM blends showed PCEs of 6.2 and 7.9%, respectively. The increase in efficiency of the devices based on DIF-ful-C-60 is due to increase in the short circuit current as well as open circuit voltage of ca. 0.8 V.

Item Type:	Article
Additional Information:	copyright for this article belongs to M\S American Chemical Society.
Subjects:	Chemistry Materials Science Nanoscience/ Nanotechnology
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	07 Dec 2018 07:27
Last Modified:	07 Dec 2018 07:27
URI:	http://npl.csircentral.net/id/eprint/2811

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