首页|The positional effect of arylamines on pyrene core in a blue fluorescent dopant significantly affecting the performance of organic light emitting diodes
The positional effect of arylamines on pyrene core in a blue fluorescent dopant significantly affecting the performance of organic light emitting diodes
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NSTL
New blue fluorescent dopant materials based on pyrene moieties were synthesized by variation of the positions of N-phenylnaphthalene-1-amine functional groups to minutely control the molecular geometry and photophysical properties.A blue dopant with the functional groups at the 1,6 position exhibited the highest photoluminescence quantum yield.3,8-Diisopropyl-N~1,N~6-di(naphthalen-1-yl)-N~1,N~6-diphenylpyrene-1,6-diamine(DI-1,6-DAP)exhibited the best performances with a current efficiency of up to 6.89 cd/A and external quantum efficiency of 5.45% among the new synthetic dopants prepared in this study.In terms of color purity,the case of substituting arylamine groups at the 1,7 position of the pyrene core unit[N~1,N~7-di(naphthalen-1-yl)-N~1,N~7-diphenylpyrene-1,7-diamine(1,7-DAP)] was superior to the case of attaching them at the 1,6 position of the same core unit[N~1,N~6-di(naphthalen-1-y1)-N~1,N~6-diphenylpyrene-1,6-diamine(1,6-DAP)](y<0.098).
Deep-blue fluorescent dopants3,8-Diisopropyl-substituted pyrene1,7-Disubstituted pyrenePositional effect of arylaminesHighly efficient blue OLEDs
Yunho Ahna、Seonghyeon Kim、Jae Ho Song
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Department of Information Display,Kyung Hee University,Dongdaemoon-Gu,Seoul 02447,Republic of Korea
Department of Polymer Science and Engineering & Department of IT Energy Convergence(BK21 Four),Korea National University of Transportation,Chungju,27469,Republic of Korea
NSTL
