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대한화학회 제105회 학술발표회 및 총회 First examples of new blue-violet emitters based on indenopyrazine core system for OLEDs : effects of the substitution positions of m-terphenyl side group on their optical and electroluminescent properties

등록일
2010년 2월 16일 14시 42분 50초
접수번호
0211
발표코드
39P193포 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
금 <발표Ⅳ>
발표형식
포스터
발표분야
재료화학
저자 및
공동저자
박영일, 이지훈1, 정동현2, 박종욱
가톨릭대학교 화학과, Korea
1충주대학교 나노고분자공학과, Korea
2(주)인실리코텍, Korea
A promising class of blue-violet emitters based on a new functional core, the indenopyrazine group, has successfully been synthesized for the first time by substitution with bulky m-terphenyl side groups in the ortho, meta, or para positions. There are larger blueshifts in the UV-visible and PL spectra of the synthesized ortho- and para- substituted derivatives than in those of the meta- substituted derivative. Molecular calculations verified that these differences are due to the variation in the π-conjugation length of the derivatives with the position at which the side group is attached to the indenopyrazine core. When the synthesized compounds were used as emitting layers in non-doped OLED devices, a related trend was observed in their optical properties. In particular, the OLED containing the para-substituted derivative was found to exhibit excellent characteristics, with maximum EL emission at 423 nm, pure violet emission with CIE coordinates (0.173, 0.063), and an external quantum efficiency of 1.88%.

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