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Synthesis and Characterization of Acceptor-Substituted Oligothiophenes for Solar Cell Applications

✍ Scribed by Amaresh Mishra; Christian Uhrich; Egon Reinold; Martin Pfeiffer; Peter Bäuerle

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
553 KB
Volume
1
Category
Article
ISSN
1614-6832

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✦ Synopsis

Abstract

We report the synthesis of novel acceptor‐substituted oligothiophenes and their application in m‐i‐p type planar heterojunction solar cells. Optical absorption spectra and electrochemical properties of the dyes are investigated. The determined energy levels of these dyes suggest that they should be ideal for use in heterojunction solar cells. We further investigate the influence of acceptor groups on the device performance by introducing 1,1‐dicyano‐2‐methyl‐vinyl and 1,1‐dicyano‐2‐phenyl‐vinyl groups, respectively, as acceptor units. Photovoltaic devices incorporating these dyes show an open circuit voltage of up to 0.96 V and power conversion efficiencies in the range of 1.5–3.0% under full sun illumination (simulated AM 1.5G sunlight, 100 mW cm^−2^).

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