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  • 08월 28일 16시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

Syntheses and Characterization of Novel Blue Emitter 4,4-dimethyl-4H-cyclopenta[def]phenanthrene(MCPP)

등록일
2008년 8월 21일 09시 22분 19초
접수번호
1564
발표코드
28P62포 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
목 <발표Ⅱ>
발표형식
포스터
발표분야
고분자화학
저자 및
공동저자
박진아
부산대학교 화학과, Korea
Novel blue emitters, oligo-MCPPs (tri-MCPP, tetra-MCPP, and penta-MCPP), have been synthesized and characterized. The introduction of cyclopenta[def]phenanthrene (CPP) units into the structure of oligo-MCPPs gave LEDs with high efficiency and pure blue emission. UV-visible absorption spectra of the thin films of these compounds appear at 333–354 nm, and their maximum PL emission at 416–447 nm. Thermal analysis of these revealed their high thermal stability. Decomposition temperatures were around 395 oC for tri-MCPP and over 500 oC for tetra-MCPP and penta-MCPP. These oligomers displayed a bright, deep-blue fluorescence in both solution and the solid state. The multi-layered OLEDs with the configuration of ITO/NPD/oligo-MCPPs/BAlq/Alq3/LiF/Al were fabricated to investigate the electroluminescent properties and the current-voltage-luminescence characteristics of the compounds. The EL spectra of oligo-MCPPs showed maximum peaks around 438 nm. The device of penta-MCPP with the configuration of ITO/NPD/penta-MCPP/BAlq/Alq3/LiF/Alshowed the turn-on voltage of about 4.8 V, the maximum brightness of 1076 cd/m2(at 8.2 V), the maximum luminescence efficiency of 0.81 cd/A, and CIE coordinates of 0.17 and 0.14.

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