White Organic Light-Emitting Diodes with Color Stability

서지정보

ㆍ발행기관 : 한국유화학회 ㆍ수록지정보 : 韓國油化學會誌 / 26권 / 3호
ㆍ저자명 : Ji-Hoon Seo, Jung-Sun Park, Ja-Ryong Koo, Bo-Min Seo, Kum-Hee Lee, Seung-Soo Yoon, Young-Kwan Kim

영어 초록

The authors have demonstrated white oraganic light-emitting diodes (WOLED) using 1,4-bis[2-(4'-diphenylaminobiphenyl-4-yl)vinyl]benzene as fluorescent blue emitter and iridium(III) bis(5-acetyl-2-phenylpyridinato-N,C2') acetylacetonate as phosphorescent red emitter. The optimized WOLED using red host material as bis(2-methyl-8-quinolinato) -4-phenylphenolate exhibited proper color stability in comparison with the control device using 4,4'-N,N'-dicarbazole-biphenyl as red host. The white device showed a maximum luminance of 21100 cd/m2 at 14 V, luminous efficiency of 9.7 cd/A at 20 mA/cm2, and Commission Internationale de I'Eclairage (CIEx,y)coordinates of (0.32, 0.34) at 1000 cd/m2. The devices also exhibited the color shift with δCIEx,y coordinates of ± (0.01,0.01) from 100 to 20000 cd/m2.

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