| 학회 |
한국화학공학회 |
| 학술대회 |
2021년 봄 (04/21 ~ 04/23, 부산 BEXCO) |
| 권호 |
27권 1호, p.157 |
| 발표분야 |
고분자 |
| 제목 |
End-Group Alkylation of Diarylethene to Enhance Photo-Switchability ofOrganic Transistors |
| 초록 |
A strategic molecular approach to maximize the switching behavior of diarylethene (DAE)-based organic transistors is introduced. By tuning the length of alkyl side chains of the biphenyl unit attached to 1,2-bis(5-biphenyl-2-methylthien-3-yl)perfluorocyclopentene (DAE), we show that the molecular environment for reversible photoisomerization of DAEs can be optimized. Four different DAEs are synthesized and ITIC is chosen to construct a semiconductor matrix to maximize the quantum yield of photoconversion considering the complementary absorption range of both materials. The improved molecular compatibility of DAEs with ITIC makes the overall bulk heterojunction film amorphous, allowing more free volume for reversible photoisomerization. DAE_C6 shows the maximum quantum yield for both photocyclization and photocycloreversion, enabling high light-controlled on/off ratios in photoswitchable transistors. Furthermore, the exceptionally high DAE_C6 quantum yield enables robust fatigue resistance under repeated photoswitching with only a 30% decrease in the on/off ratio after 100 cycles. |
| 저자 |
Hassan Syed Zahid, 유성훈, 소찬, 강민균, 이진우, Metikoti Jagadeeswararao, 문도현, 정대성
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| 소속 |
포항공과대 |
| 키워드 |
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| E-Mail |
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| 원문파일 |
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