Document Type

Journal Article

Department/Unit

Department of Chemistry

Title

A-D-A type small molecules based on boron dipyrromethene for solution-processed organic solar cells

Language

English

Abstract

The unique properties of boron dipyrromethene (BODIPY) dyes including facile synthesis, high absorption coefficients, and delocalized molecular orbitals as well as excellent photochemical and thermal stability, make them promising as materials for organic solar cells. Accordingly, in this study three A-D-A structural small molecules of BDTT-BODIPY, FL-BODIPY, and TT-BODIPY have been synthesized, in which two BODIPY acceptor units are symmetrically conjugated to 4,8-bis(5-(2-ethylhexyl) thiophen-2-yl)benzo[1,2-b:4,5-b]dithiophene (BDTT), 9,9-dioctyl-9H-fluorene (FL), and thieno[3,2-b]thiophene (TT) donor cores, respectively. The manipulation of the structural parameters significantly improves the performances of the BHJ OSCs, which show power conversion efficiencies of 4.75 %, 1.51 %, and 1.67 % based on [6,6]-phenyl C71-butyric acid methyl ester (PC71BM) as the acceptor material and BDTT-BODIPY, FL-BODIPY, and TT-BODIPY as the donor materials, respectively.

Keywords

BODIPY, bulk heterojunction, donor–acceptor systems, small molecules, solar cells

Publication Date

2015

Source Publication Title

Chemistry - An Asian Journal

Volume

10

Issue

7

Start Page

1513

End Page

1518

Publisher

Wiley-VCH Verlag

DOI

10.1002/asia.201500382

Link to Publisher's Edition

http://dx.doi.org/10.1002/asia.201500382

ISSN (print)

18614728

ISSN (electronic)

1861471X

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