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제124회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Change of Electronic Properties of DPP-Based Small Molecules Depending on Alkyl Chain Position

등록일
2019년 8월 29일 12시 38분 42초
접수번호
1793
발표코드
POLY.P-46 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 18일 (금요일) 11:00~12:30
발표형식
포스터
발표분야
Polymer Chemistry
저자 및
공동저자
Sungjoon Cho, Han Young Woo1,*
Chemistry, Korea University, Korea
1Department of Chemistry, Korea University, Korea

Diketopyrrolopyrrole (DPP) which is a π-conjugated organic semiconducting molecule, is a high performing building block for organic field effect transistors (OFETs). In OFETs devices using a DPP-based material, it shows hole or ambipolar transport characteristics. But n-type has not been developed much compared with p-type due to problems to lower LUMO level. 2-(2,3-dihydro-3-oxo-1H-inden-1-ylidene)propanedinitrile (INCN) is well-known electron acceptor structure. It is a prospective structure that induces deep LUMO level, increases conjugation length, and has efficient intermolecular π-π interactions without distorting the backbone structure. commonly, high-crystalline materials do not dissolve well. This processing trouble can be solved by attaching an alkyl chain of proper length. So, we designed it to have sufficient solubility by attaching an alkyl chain at the INCN group end in different positions. This new INCN moiety was attached to the DPP core to synthesize small molecule, which has high crystallinity without solubility problem and low LUMO level below than -4.0 eV. Finally, an n-type organic semiconductor containing a DPP core shows high electron mobility (~0.8 cm2/Vs).


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