Synthesis and Characterization of a highly crystalline benzotriazole-selenophene copolymer semiconductor
- Authors
- Lee, Eunbyuel; Shin, Woojin; Bae, Onyu; Kim, Felix Sunjoo; Hwang, Ye-Jin
- Issue Date
- Dec-2019
- Publisher
- Elsevier Ltd
- Keywords
- Benzotriazole; Conjugated copolymer; p-channel organic transistors; Selenophene
- Citation
- Polymer, v.184
- Journal Title
- Polymer
- Volume
- 184
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/37228
- DOI
- 10.1016/j.polymer.2019.121856
- ISSN
- 0032-3861
1873-2291
- Abstract
- A new donor (D)-acceptor (A) type copolymer semiconductor based on benzotriazole and selenophene was designed and synthesized. The benzotriazole-selenophene copolymer (P(BTz-Se)) showed a highly crystalline lamellar packing structure with a lamellar interchain distance of 1.77 nm and large mean crystalline domain size of 17.26 nm. The average field-effect hole mobility of an as-cast P(BTz-Se) film was 2.93×10−4 cm2 V−1 s−1. After annealing the polymer film at 150 °C, a 55-fold enhanced average hole mobility (1.61×10−2 cm2 V−1 s−1) with high on/off current ratio (1.7×106) was observed. In addition to the great charge carrier mobility, P(BTz-Se) showed a narrow energy bandgap (1.69 eV) and broad optical absorption range with excellent absorption coefficient, suggesting that this copolymer semiconductor may also be a good electron donor in organic photovoltaic devices. © 2019 Elsevier Ltd
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Collections - College of Engineering > School of Chemical Engineering and Material Science > 1. Journal Articles
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