Document Type

Journal Article

Department/Unit

Department of Chemistry

Title

Synthesis, characterization and photovoltaic properties of benzo[1,2-b:4,5-b′]dithiophene-bridged molecules

Language

English

Abstract

© 2014 The Royal Society of Chemistry.Four new acceptor-donor-acceptor based organic small molecules with the benzo[1,2-b:4,5-b′]dithiophene (BDT) unit as the central donor group, benzothiadiazole (BT) or fluoro-substituted benzothiadiazole as the acceptor, and different end-capping groups (BTBDT1-BTBDT4) have been synthesized and tested for solution-processed bulk-heterojunction organic solar cells. The absorption spectra, electronic energy levels, hole mobilities and solar cell performance of these compounds were investigated. All compounds show broad absorption in the visible range. The PCE of the solar cell device based on BTBDT3/PC71BM (1:2, w/w) reached 3.91% with a Jsc of 10.08 mA cm-2, a Voc of 0.90 V and a FF of 0.43, under illumination of AM 1.5G, 100 mW cm-2.

Publication Date

2014

Source Publication Title

RSC Advances

Volume

4

Issue

108

Start Page

63260

End Page

63267

Publisher

Royal Society of Chemistry

DOI

10.1039/C4RA10081F

Link to Publisher's Edition

http://dx.doi.org/10.1039/C4RA10081F

ISSN (electronic)

20462069

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