Document Type

Journal Article

Department/Unit

Department of Chemistry

Title

Organic donor materials based on bis(arylene ethynylene)s for bulk heterojunction organic solar cells with high Voc values

Language

English

Abstract

© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. A series of purely organic small molecules 1-4 based on bis(arylene ethynylene)s with various electron-rich aromatic bridges, such as benzene, cyclopentadithiophene (CDT), and diphenyl(p-tolyl)amine, were synthesized by a Sonogashira coupling reaction. Their optical, electronic, and electrochemical properties were fully characterized. The photovoltaic properties of these molecules as donor materials and [6,6]-phenyl-C71-butyric acid methyl ester as an acceptor material in solution-processed bulk heterojunction devices were studied. Among them, CDT-bridged molecule 2 exhibited the best photovoltaic performance and achieved a power conversion efficiency of 3.28%. In addition, the photovoltaic efficiencies of these molecules are higher than their corresponding platinum-containing counterparts, probably owing to their stronger light absorption and improved open-circuit voltage.

Keywords

conjugation, donor-acceptor systems, electrochemistry, organic solar cells, photochemistry

Publication Date

2015

Source Publication Title

Chemistry - An Asian Journal

Volume

10

Issue

4

Start Page

1017

End Page

1024

Publisher

Wiley-VCH Verlag

DOI

10.1002/asia.201403264

Link to Publisher's Edition

http://dx.doi.org/10.1002/asia.201403264

ISSN (print)

18614728

ISSN (electronic)

1861471X

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