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

Sonar, Prashant, Singh, Samarendra P., Li, Yuning, Ooi, Zi-En, Ha, Tae-Jun, Wong, Ivy, Soh, Mui Siang, & Dodabalapur, Ananth (2011) High mobility organic thin film transistor and efficient photovoltaic devices using versatile donor-acceptor polymer semiconductor by molecular design. Energy and Environmental Science, 4(6), pp. 2288-2296.

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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-1 s-1 and 0.98 cm2 V -1 s-1 are achieved respectively in bottom gate and dual gate OTFT devices with on/off ratios in the range of 105 to 10 7. 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.

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ID Code: 75248
Item Type: Journal Article
Refereed: Yes
Keywords: Acceptor moieties, Bottom gate, Building blockes, Diketopyrrolopyrroles, Donor-acceptor polymers, Donor-acceptors, Dual gates, Energy level, High mobility, High power conversion, Low bandgap polymers, Molecular design, On/off ratio, Organic electronics, Organic photovoltaics, Organic thin film transistors, Photovoltaic devices, Polymer backbones, Polymer semiconductors, Processable, Suzuki couplings, Conversion efficiency, Energy gap, Field effect transistors, Naphthalene, Photovoltaic effects, Polymers, Thin film devices, Thin film transistors, Transistors, design, film, mobility, photovoltaic system, polymer, semiconductor industry
DOI: 10.1039/c1ee01213d
ISSN: 1754-5692
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2011 The Royal Society of Chemistry.
Deposited On: 09 Oct 2014 00:14
Last Modified: 09 Oct 2014 22:37

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