Efficiency phosphorescent OLEDs with a low roll-off based on a hetero-triplet iridium complex
نویسندگان
چکیده
منابع مشابه
High power efficiency phosphorescent poly(dendrimer) OLEDs.
We show that it is possible to produce an efficient solution-processable phosphorescent poly(dendrimer) OLED with a 32 lm/W power efficiency at 100 cd/m2 without using a charge transporting host or any improvements in light extraction. This is achieved by using the dendrimer architecture to control inter-chromophore interactions. The effects of using 4,4',4″-tris(N-carbazolyl)triphenylamine (TC...
متن کاملHighly efficient triazine/carbazole-based host material for green phosphorescent organic light-emitting diodes with low efficiency roll-off
Two novel host materials, 3-(dibenzo[b,d]furan-4-yl)-9-(4,6-diphenyl-1,3,5-triazin-2-yl)-9H-carbazole (BFTC) and 3-(dibenzo[b,d]thiophen-4-yl)-9-(4,6-diphenyl-1,3,5-triazin-2-yl)-9H-carbazole (BTTC) were designed and synthesized. These two compounds exhibited excellent physical properties with high thermal stabilities and reasonable HOMO–LUMO energy levels. Both of them were applied to fabricat...
متن کاملHighly phosphorescent perfect green emitting iridium(iii) complex for application in OLEDs.
A novel iridium complex, [bis-(2-phenylpyridine)(2-carboxy-4-dimethylaminopyridine)iridium(iii)] (N984), was synthesized and characterized using spectroscopic and electrochemical methods; a solution processable OLED device incorporating the N984 complex displays electroluminescence spectra with a narrow bandwidth of 70 nm at half of its intensity, with colour coordinates of x = 0.322; y = 0.529...
متن کاملGraded-host phosphorescent light-emitting diodes with high efficiency and reduced roll-off
Related Articles Encapsulating light-emitting electrochemical cells for improved performance Appl. Phys. Lett. 100, 193508 (2012) Efficiency degradation behaviors of current/thermal co-stressed GaN-based blue light emitting diodes with vertical-structure J. Appl. Phys. 111, 093110 (2012) Influence of laser lift-off on optical and structural properties of InGaN/GaN vertical blue light emitting d...
متن کاملAchieving high power efficiency and low roll-off OLEDs based on energy transfer from thermally activated delayed excitons to fluorescent dopants.
Achieving high power efficiencies at high-brightness levels is still an important issue for organic light-emitting diodes (OLEDs) based on the thermally activated delayed fluorescence (TADF) mechanism. Herein, enhanced electroluminescence efficiencies were achieved in fluorescent OLEDs using a TADF molecule, (4s,6s)-2,4,5,6-tetra(9H-carbazol-9-yl)isophthalonitrile (4CzIPN), as a host and quinac...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Dyes and Pigments
سال: 2015
ISSN: 0143-7208
DOI: 10.1016/j.dyepig.2014.10.001