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  • 03월 02일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제109회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Optoelectronic property of graphene functionalized with spiropyran

등록일
2012년 2월 28일 19시 07분 18초
접수번호
1514
발표코드
MAT.P-1209 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
4월 25일 (수요일) 18:00~21:00
발표형식
포스터
발표분야
재료화학
저자 및
공동저자
장아랑, 강동우, 신현석1
울산과학기술대학교 친환경에너지공학부, Korea
1울산과학기술대학교 에너지공학부, Korea
Graphene is functionalized with spiropyran, a well-known photochromic molecule, via non-covalent boning. The field-effect transistor (FET) with spiropyran-functionalized graphene exhibits n-doping effect and interesting optoelectronic behaviors. The Dirac point of graphene in the FET could be controlled by light modulation because spiropyran can be reversibly switched between two different conformations of neutral form (colorless spiropyran) and charge separated form (purple colored merocyanine) on UV-Vis light irradiation. The merocyanine form is produced during UV light irradiation, inducing the shift of the Dirac point of graphene toward negative gate voltage. This result indicates that carrier density was changed by dipole moment of separated charges. Also, the reverse process to neutral spiropyran form occurred during visible light irradiation, inducing the shift of the Dirac point toward positive gate voltage. The change of Dirac point by UV and visible light was reproducibly repeated. Furthermore, spiropyran molecules improve photocurrent response of graphene. Details on experimental process and optoelectronic property of graphene functionalized with spiropyran will be presented.

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