| 학회 |
한국재료학회 |
| 학술대회 |
2018년 가을 (11/07 ~ 11/09, 여수 디오션리조트) |
| 권호 |
24권 2호 |
| 발표분야 |
A. 전자/반도체 재료 분과 |
| 제목 |
Facilitating Phase Transfer of Polymer Semiconductor in Mini-Emulsion Synthesis via Side Chain Engineering |
| 초록 |
A synthetic approach has demonstrated to enhance coalescence phenomenon during solidification of water-borne colloids so that thin, even, and continuous film morphology of polymer semiconductors can be realized. From theoretical study of complex colloids, it is shown that small-sized and uniform colloid particles are essential to minimize depletion contact energy between colloid particles and thus to enhance coalescence. Therefore, the novel synthesized polymer semiconductor is designed for better molecular affinity with surfactants, so that phase transfer of polymer semiconductors from organic phase to water phase can proceed more efficiently during mini-emulsion synthesis. This is achieved by substituting a Si atom to the branching C atom of the alkyl solubilizing group of a conventional donor-acceptor polymer semiconductor. Such a chemical modification increases the volumetric portion of hydrophobic alkyl side chains and thus enables higher solubility as well as higher hydrophobicity, all of which are closely related with enhancing molecular affinity between polymer semiconductor and surfactants. As a result, it is shown that the performance of organic field-effect transistors fabricated from water-borne colloids can be improved to a level similar to the case of organic solvents. More importantly, we also show the reproducibility of transistor performance is greatly improved due to the uniform and small water-borne colloidal particles. |
| 저자 |
유성훈1, 송형근2, 조장환1, 심규민1, 김경환1, 권순기2, 김윤희2, 정대성1
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| 소속 |
1대구경북과학기술원, 2경상대 |
| 키워드 |
polymer semiconductor; mini-emulsion; phase transfer; colloids; side chain engineering; molecular affinity
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| E-Mail |
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