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슬롯사이트 보스-E Article

Advanced Organic Transistor-Based Sensors Utilizing a Solvatochromic Medium with Twisted Intramolecular Charge-Transfer Behavior and Its Application to Ammonia Gas Detection

	성명	이화성 ()
	소속	공학슬롯사이트 보스 재료화학공학과
	캠퍼스
	우수선정주	2022년 02월 4째주

Author

Oh, Seungtaek (Dept Mat 슬롯사이트 보스 & Chem Engn); Choi, Giheon (Dept Mat 슬롯사이트 보스 & Chem Engn); Seo, Jungyoon (Dept Mat 슬롯사이트 보스 & Chem Engn); Park, Eunyoung (Dept Mat 슬롯사이트 보스 & Chem Engn); 이화성 (Dept Mat 슬롯사이트 보스 & Chem Engn) corresponding author; Oh, Seungtaek (BK21 FOUR ERICA AC

Corresponding Author Info

Lee, HS (corresponding author), Hanyang Univ, Dept Mat 슬롯사이트 보스 & Chem Engn, Ansan 15588, Gyeonggi, South Korea.; Lee, HS (corresponding author), Hanyang Univ, BK21 FOUR ERICA ACE Ctr, Ansan 15588, Gyeonggi, South Korea.; An, TK (corresponding author), Korea N

E-mail

hslee78@hanyang.ac.kr

Document Type

Article

Source

ACS APPLIED MATERIALS & INTERFACESVolume:13 Issue:47 Pages:56385-56393 Published:2021

Times Cited

External Information

Abstract

Here, we designed and developed an organic field-effect transistor (OFET)-based gas sensor by applying solvatochromic dye (Nile red, NR) with twisted intramolecular charge-transfer (TICT) behavior depending on the polarity of the surrounding molecules, as an auxiliary NR sensing medium (aNR-SM). As a polar molecule approaches, intra-charge transfers from the donor diethylamine group to the ketone group occur in the NR molecule, resulting in the twisting of the donor functional group and thereby increasing its dipole moment. Using this characteristic, NR was applied as an auxiliary sensing medium to the OFET for detecting ammonia (NH3), a representative toxic gas. The Top-NR case, where the aNR-SM covers only the top of the organic semiconductor layer, showed the best gas sensing performance, and its response and recovery rates were improved by 46 and 94%, respectively, compared to the pristine case. More importantly, a sensitivity of 0.87 +/- 0.045 ppm(-1) % was measured, having almost perfect linearity (0.999) over the range of measured NH3 concentrations, which is the result of solving the saturation problem in the sensing characteristics of the OFET-based gas sensor. Our result not only improved the sensing performance of the OFET-based sensor but also made an important advance in that the reliability of the sensing performance was easily secured by applying solvatochromic and TICT behaviors of an auxiliary sensing medium.

Web of 슬롯사이트 보스ence Categories

Nano슬롯사이트 보스ence & Nanotechnology; Materials 슬롯사이트 보스ence, Multidi슬롯사이트 보스plinary

Funding

Korea Institute for Advancement of Technology (KIAT) grant - Korea Government (MOTIE); Basic 슬롯사이트 보스ence Research Program through the National Research Foundation of Korea (NRF) - Ministry of EducationNational Research Foundation of Korea [2021R1F1A1063863]

Language

English

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