Issue 6, 2011
From the journal:

Energy & Environmental Science

High mobility organic thin film transistor and efficient photovoltaic devices using versatile donor–acceptor polymer semiconductor by molecular design

Prashant Sonar,*a   Samarendra P. Singh,a   Yuning Li,*ab   Zi-En Ooi,a   Tae-jun Ha,c   Ivy Wong,a   Mui Siang Soha  and  Ananth Dodabalapur*ac  

* Corresponding authors

a Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology, and Research (A*STAR), 3 Research Link, Singapore
E-mail: sonarp@imre.a-star.edu.sg, yuning.li@uwaterloo.ca, ananth.dodabalapur@engr.utexas.edu

b Department of Chemical Engineering, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, Canada

c Microelectronics Research Center, The University of Texas at Austin, Austin, TX, USA

Abstract

In this work, we report a novel donor–acceptor based solution processable low band gap polymer semiconductor, PDPP–TNT, synthesized via Suzuki coupling using condensed diketopyrrolopyrrole (DPP) as an acceptor moiety with a fused naphthalene donor building block in the polymer backbone. This polymer exhibits p-channel charge transport characteristics when used as the active semiconductor in organic thin-film transistor (OTFT) devices. The hole mobilities of 0.65 cm2 V−1s−1 and 0.98 cm2 V−1s−1 are achieved respectively in bottom gate and dual gate OTFT devices with on/off ratios in the range of 105 to 107. Additionally, due to its appropriate HOMO (5.29 eV) energy level and optimum optical band gap (1.50 eV), PDPP–TNT is a promising candidate for organic photovoltaic (OPV) applications. When this polymer semiconductor is used as a donor and PC71BM as an acceptor in OPV devices, high power conversion efficiencies (PCE) of 4.7% are obtained. Such high mobility values in OTFTs and high PCE in OPV make PDPP–TNT a very promising polymer semiconductor for a wide range of applications in organic electronics.

Graphical abstract: High mobility organic thin film transistor and efficient photovoltaic devices using versatile donor–acceptor polymer semiconductor by molecular design

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Article information

DOI
https://doi.org/10.1039/C1EE01213D
Article type
Paper
Submitted
23 Feb 2011
Accepted
11 Apr 2011
First published
12 May 2011

Energy Environ. Sci., 2011,4, 2288-2296

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High mobility organic thin film transistor and efficient photovoltaic devices using versatile donor–acceptor polymer semiconductor by molecular design

P. Sonar, S. P. Singh, Y. Li, Z. Ooi, T. Ha, I. Wong, M. S. Soh and A. Dodabalapur, Energy Environ. Sci., 2011, 4, 2288 DOI: 10.1039/C1EE01213D

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