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

作者：Sonar Prashant^*; Singh Samarendra P; Li Yuning; Ooi Zi En; Ha Tae jun; Wong Ivy; Soh Mui Siang; Dodabalapur Ananth

来源：Energy & Environmental Science, 2011, 4(6): 2288-2296.

DOI：10.1039/c1ee01213d

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 cm(2) V(-1) s(-1) and 0.98 cm(2) V(-1) s(-1) are achieved respectively in bottom gate and dual gate OTFT devices with on/off ratios in the range of 10(5) 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 PC(71)BM 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.

• 出版日期2011-6