Efficient fluorescent white organic light-emitting diodes using co-host/emitter dual-role possessed di(triphenyl-amine)-1,4-divinyl-naphthalene |
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| Affiliation: | 1. Gandhi Institute for Technological Advancement (GITA), Bhubaneswar, 752054, India;2. Biju Patnaik University of Technology (BPUT), Odisha, Rourkela, India;1. Henan University of Science & Technology, the College of Physics Engineering, Luoyang, 471003, China;2. The Puyang Photoelectric Industry Technology Institute, Pu Yang, 457100, China;3. Nanchang University, the College of Science, Nanchang, 330031, China;1. School of Chemistry and Chemical Engineering, Southeast University, Nanjing, Jiangsu, 211189, PR China;2. College of Life Science and Chemistry, Jiangsu Key Laboratory of Biological Functional Molecules, Jiangsu Second Normal University, Nanjing, Jiangsu, 210013, PR China;3. Department of Chemical and Pharmaceutical Engineering of Southeast University Chengxian College, Nanjing, Jiangsu, 210088, PR China;1. School of Electrical and Information Engineering, Heilongjiang University of Science and Technology, Harbin 150022, China;2. School of Chemistry and Life Science, Changchun University of Technology, Changchun 130012, China |
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| Abstract: | Efficient fluorescent white organic light-emitting diodes with low carrier-injection barriers were fabricated with device structure of indium tin oxide/N,N′-bis-(1-naphthy)-N,N′-diphenyl-1,1′-biphenyl-4-4′-diamine/white emission layer/1,3,5-tris(N-phenyl-benzimidazol-2-yl)benzene/lithium fluoride/aluminium. By blending in the blue host of 1-butyl-9,10-naphthalene-anthracene in the emissive layer an efficient electro-luminescent greenish-blue co-host of di(triphenyl-amine)-1,4-divinyl-naphthalene, with the doping of a trace amount of red dye of 4-(dicyano-methylene)-2-methyl-6-(julolidin-4-yl-vinyl)-4H-pyran, bright and colour-stable white emission with high power-efficiency of 14.6 lm/W at 100 cd/m2 or current efficiency of 19.2 cd/A at 300 cd/m2 or 18.7 cd/A at 10,000 cd/m2 was obtained. The resulted synergistic increase in brightness and efficiency may be attributed to the presence of cascading new routes with comparatively lower electron injection barrier. |
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