| 학회 |
한국고분자학회 |
| 학술대회 |
2021년 가을 (10/20 ~ 10/22, 경주컨벤션센터) |
| 권호 |
46권 2호 |
| 발표분야 |
대학원생 구두발표(영어발표, 발표15분) |
| 제목 |
Strategic Approach for Enhancing Sensitivity of Ammonia Gas Detection: Molecular Design Rule and Morphology Optimization for Stable Radical Anion Formation of Rylene Diimide Semiconductors |
| 초록 |
Herein, a strategic approach to enhance the sensitivity of ammonia gas detection using organic semiconductors by boosting the efficiency of ammonia gas-induced stable radical anion formation (SRAF) is reported. New rylene diimide derivatives are designed and used to prepare molecular templates for efficient SRAF in thin films, and they are applied as gas-adsorbing active layers in FETs. Substituting linear-shaped perfluoroalkyl (PF) groups to π-electron-deficient naphthalene diimide (NDI) backbone enhances the ammonia gas detection limit to 200 ppb, attributed to the strong electron-withdrawing capability and low steric hindrance of PF groups. Replacing the core backbone (NDI) with perylene diimide (PDI) while retaining the PF group further enhances gas responsivity up to 18.17 due to the enlarged π-conjugated bridge area. The results indicate that molecular engineering for high-efficiency SRAF suggests a new strategy for developing high sensitivity ammonia sensing platforms. |
| 저자 |
오병민1, 박성하1, 이정현2, 김진철2, 이종범1, 은형주1, 이윤상1, 서보은1, 윤우진1, 권지언3, 윤호섭1, 곽상규2, 권오필1, 김종현1
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| 소속 |
1아주대, 2UNIST, 3KIST |
| 키워드 |
electron-withdrawing groups; gas sensors; gas responsivity; organic field-effect transistors; stable radical anion formation
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| E-Mail |
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