Issue 35, 2011
From the journal:

Journal of Materials Chemistry

High-mobility low-bandgap conjugated copolymers based on indacenodithiophene and thiadiazolo[3,4-c]pyridine units for thin film transistor and photovoltaic applications

Ying Sun,ab   Shang-Chieh Chien,ac   Hin-Lap Yip,a   Yong Zhang,a   Kung-Shih Chen,a   David F. Zeigler,d   Fang-Chung Chen,c   Baoping Lin*b  and  Alex K.-Y. Jen*a  

* Corresponding authors

a Department of Materials Science and Engineering, University of Washington, Seattle, Washington, USA
E-mail: ajen@u.washington.edu
Fax: +1 206 543 3100
Tel: +1 206 543 2626

b School of Chemistry and Chemical Engineering, Southeast University, Jiangning District, Nanjing, Jiangsu Province, P.R. China
E-mail: lbp@seu.edu.cn
Fax: +86-25-52090616
Tel: +86-25-52090616

c Department of Photonics & Display Institute, National Chiao Tung University, Hsinchu, Taiwan

d Department of Chemistry, University of Washington, P.O. Box 351700, Seattle, Washington, USA

Abstract

Two new semiconducting polymers based on indacenodithiophene and thiadiazolo[3,4-c]pyridine units were synthesized viaStille coupling polymerization. The polymers, PIDTPyT and PIDTDTPyT, exhibited main absorption bands in the range of 550–800 nm while their absorption maxima were located at around 700 nm in films. With two additional thiophene spacers, PIDTDTPyT showed a broader absorption band but a 20 nm blue-shifted maximum peak compared to that of PIDTPyT. Both of the polymers possess low bandgaps (∼1.6 eV) and deep energy levels for both the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO). Organic field-effect transistors (OFETs) device measurements indicate that PIDTPyT and PIDTDTPyT have high hole carrier mobilities of 0.066 and 0.045 cm2 V−1s−1, respectively, with the on/off ratio on the order of 106. Bulk heterojunction photovoltaic devices consisting of the copolymers and PC71BM gave power conversion efficiencies (PCE) as high as 3.91% with broadband photo-response in the range of 300–800 nm. The relationships between the photovoltaic performance and film morphology, energy levels, hole mobilities are discussed.

Graphical abstract: High-mobility low-bandgap conjugated copolymers based on indacenodithiophene and thiadiazolo[3,4-c]pyridine units for thin film transistor and photovoltaic applications

About
Cited by
Related
Download options Please wait...

Article information

DOI
https://doi.org/10.1039/C1JM11564B
Article type
Paper
Submitted
12 Apr 2011
Accepted
30 Jun 2011
First published
29 Jul 2011

J. Mater. Chem., 2011,21, 13247-13255

Permissions

Request permissions

High-mobility low-bandgap conjugated copolymers based on indacenodithiophene and thiadiazolo[3,4-c]pyridine units for thin film transistor and photovoltaic applications

Y. Sun, S. Chien, H. Yip, Y. Zhang, K. Chen, D. F. Zeigler, F. Chen, B. Lin and A. K.-Y. Jen, J. Mater. Chem., 2011, 21, 13247 DOI: 10.1039/C1JM11564B

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.

Spotlight

Advertisements