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  • 09월 10일 16시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제124회 대한화학회 학술발표회, 총회 및 기기전시회 안내 π‐Conjugated Polymers Incorporating a Novel Planar Quinoid Building Block with Extended Delocalization and High Charge Carrier Mobility

2019년 9월 20일 11시 11분 20초
KCS.O-8 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
목 10시 : 41분
KCS - Oral Presentation for 2019 DOW Korea Award
저자 및
Yunseul Kim, Hansu Hwang, Nam-Koo Kim, Kyoungtae Hwang, Jong-Jin Park, Ga-In Shin, Dong-Yu Kim*
School of Materials Science and Engineering (SMSE), Gwangju Insititute of Science and Technology (GIST), Korea
Conjugated polymers have been extensively studied as organic semiconductors and investigated for various applications such as flexible displays and printed electronics due to their mechanical flexibility and solution processability. In particular, molecular design, synthesis, and structure-property relationship of π-conjugated polymers have been intensively researched. A quinoid structure is a molecular conformation in which aromatic rings are connected by double bonds. Their high molecular planarity arisen from double bond linkage induces a favorable intramolecular π-electron delocalization and an efficient intermolecular overlap of π-orbitals, leading to improving charge transport. Moreover, they have unique features such as low electronic band-gap and amphoteric redox properties. Here, we present two conjugated polymers, PQuT-T and PQuT-BT, incorporating quinoidal thiophene by substituting isatin termini. By combining 1D-, 2D-COSY, and NOESY NMR analyses, the isomeric form of the major quinoidal moiety is clearly identified as the asymmetric Z, E-configuration. These quinoidal moiety contributed greatly not only to narrow band-gap but also to achieve high mobility in organic field-effect transistors. Charge transport properties of quinoidal polymers are enhanced by chain alignment via simple solution processing technique using centrifugal force, with PQuT-BT exhibiting a high hole mobility of 8.09 cm2/Vs.