Photoluminescence and Electroluminescence of Carbazole-based Conjugated Dendritic Molecules
Photoluminescence and Electroluminescence of Carbazole-based Conjugated Dendritic Molecules
- 주제(키워드) dendritic molecule , absorption , photoluminescence , electroluminescence , blue emission , dendritic molecule , absorption , photoluminescence , electroluminescence , blue emission
- 발행기관 한국정보디스플레이학회
- 발행년도 2008
- 총서유형 Journal
- UCI G704-002168.2008.9.3.004
- KCI ID ART001283448
- 본문언어 영어
초록/요약
A novel class of conjugated dendritic molecules bearing N-hexyl-substituted carbazoles as peripheral groups and various conjugative aromatic cores was synthesized through Heck coupling and the Horner-Emmons reaction. A multi-layered structure of ITO/PEDOT:PSS (30 nm)/emitting material (50 nm)/BCP (10 nm)/Alq3 (10 nm)/LiF (1 nm)/Al (100 nm) was employed to evaluate the synthesized dendritic materials. The electroluminescence spectrum of the multilayered device made of 3Cz predominantly exhibited blue emissions. Similar emissions were observed in the PL spectra of it’s the device’s thin film. The multilayered devices made of 3Cz, 3BCz, and 4BCz showed luminance values of 6,250 cd m–2 at 24 V, 3,000 cd m–2 at 25 V, and 1,970 cd m–2 at 36 V, respectively. The smallest molecule, 3Cz, which bore three carbazole peripheral groups, exhibited a blue-like emission with CIE 1931 chromaticity coordi-nates of x = 0.17 and y = 0.21.
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