Flexible Organic Electrolyte-Gated Transistors Based on Thin Polymer Blend Films of Crystalline C8-BTBT and Amorphous PTAA
- Authors
- Bae, Onyu; Kim, Felix Sunjoo
- Issue Date
- Jun-2020
- Publisher
- POLYMER SOC KOREA
- Keywords
- small-molecular semiconductor; polymer blend; organic electrolyte-gated transistor; flexible electronic device; bending test
- Citation
- MACROMOLECULAR RESEARCH, v.28, no.7, pp 677 - 682
- Pages
- 6
- Journal Title
- MACROMOLECULAR RESEARCH
- Volume
- 28
- Number
- 7
- Start Page
- 677
- End Page
- 682
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/42688
- DOI
- 10.1007/s13233-020-8118-9
- ISSN
- 1598-5032
2092-7673
- Abstract
- Thin films of polymer blends consisting of a crystalline small-molecular semiconductor, 2,7-dioctyl[1]benzothieno[3,2-b][1]benzothiophene (C8-BTBT), and an amorphous polymer semiconductor, poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA), are studied and applied to organic electrolyte-gated transistors (OEGTs). The compositions can be easily controlled by adjusting the mixing ratios of the solutions in chloroform. In the thin-film state, PTAA acts as a structural matrix and a charge-transport bridge for C8-BTBT grains. The C8-BTBT:PTAA blends have a compositional effect on the thin-film properties and performance of OEGTs. As a result, the C8-BTBT:PTAA blend films with weight ratios of 8:2 exhibit a hole mobility twice that of pristine C8-BTBT films. Moreover, OEGTs based on the C8-BTBT:PTAA blend exhibit better charge-transport properties on flexible plastic substrates under bending conditions, compared to flat devices.
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