| 학회 |
한국고분자학회 |
| 학술대회 |
2021년 가을 (10/20 ~ 10/22, 경주컨벤션센터) |
| 권호 |
46권 2호 |
| 발표분야 |
분자전자 부문위원회 Ⅰ,Ⅱ |
| 제목 |
End-group alkylation of diarylethene to enhance photo-switchability of organic transistors |
| 초록 |
A molecular and synthetic approach to strengthen switching performance of diarylethene (DAE)-based organic transistor is proposed. From photophysical, structural and morphological analyses, we found that longer alkyl chains inhibit intermolecular aggregation between DAEs and allow more hydrophobic surface property of DAEs, thus improving molecular miscibility with ITIC. In addition, it is found that the improved molecular compatibility of DAEs with ITIC makes the overall bulk heterojunction (BHJ) film amorphous, allowing more free volume for reversible photoisomerization. As a result, DAE_C6 exhibits the maximum quantum yield for both photocyclization and photocycloreversion, enabling high light-controlled on/off ratios when employed as a photoswitch of ITIC transistor. Furthermore, exceptionally high quantum yield of DAE_C6 enables robust fatigue resistance under repeated photoswitching of the transistor with only 30% decrease of on/off ratio after 100 cycles. |
| 저자 |
Syed Zahid Hassan1, 유성훈1, 소찬1, 문도현2, 정대성1
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| 소속 |
1Pohang Univ. of Science & Technology, 2Pohang Accelerator Laboratory |
| 키워드 |
Molecular switches; diarylethenes; molecular compatibility; miscibility; transistors
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| E-Mail |
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