Issue 16, 2013

One, two and three-branched triphenylamine–oligothiophene hybrids for solution-processed solar cells

Abstract

A series of one, two and three-branched push–pull molecules (TPA-1T-CA, TPA-2T-CA, TPA-3T-CA, L(TPA-3T-CA) and S(TPA-3T-CA)) with triphenylamine–oligothiophene hybrids as donor groups and alkyl cyanoacetate as acceptor end groups were synthesized and investigated as electron donors in solution-processed organic solar cells (OSCs). These push–pull molecules showed excellent thermal stability with decomposition temperatures over 330 °C, strong optical absorption at 300–700 nm, deep HOMO energy levels (−5.2 to −5.5 eV), and relatively high hole mobilities (4 × 10−4 to 8 × 10−3 cm2 V−1 s−1). OSCs based on blends of these donors and PC71BM acceptors exhibited power conversion efficiencies of 3.2% to 4%. The effects of oligothiophene bridge length and branch number on absorption, energy level, charge transport, morphology and photovoltaic properties of the molecules were investigated.

Graphical abstract: One, two and three-branched triphenylamine–oligothiophene hybrids for solution-processed solar cells

Supplementary files

Article information

Article type
Paper
Submitted
15 1 2013
Accepted
19 2 2013
First published
20 2 2013

J. Mater. Chem. A, 2013,1, 5128-5135

One, two and three-branched triphenylamine–oligothiophene hybrids for solution-processed solar cells

Y. Lin, Z. Zhang, Y. Li, D. Zhu and X. Zhan, J. Mater. Chem. A, 2013, 1, 5128 DOI: 10.1039/C3TA10205J

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements