1346645-54-2Relevant academic research and scientific papers
New bipolar host materials for high performance of phosphorescent green organic light-emitting diodes
Kim, Gyeong Heon,Lampande, Raju,Kong, Ji Hoon,Lee, Jung Min,Kwon, Jang Hyuk,Lee, Jae Kyun,Park, Jung Hwan
, p. 31282 - 31291 (2015)
We report a series of four bipolar host materials with indenocarbozole and biphenyl pyrimidine moieties for efficient phosphorescent green organic light-emitting diodes (OLEDs). All four host materials possess excellent electro-optical properties as well as good thermal and morphological stability due to their high glass transition temperature of 129°C and decomposition temperature of 363-401°C. The new materials also show good triplet energy of 2.76 eV and excellent charge carrier transport properties. The fabricated OLED device with 11-[3-(2,6-diphenyl-pyrimidin-4-yl)-phenyl]-12,12-dimethyl-11,12-dihydro-11-aza-indeno[2,1-a]fluorene (mDPPICz1) as green host shows maximum current and power efficiency as high as 75.8 cd A-1 and 87.1 lm W-1 at 1000 cd m-2, and an almost ideal external quantum efficiency of 21.7%.
Terpyridine derivative and preparation method and application thereof as well as device
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, (2019/07/04)
The invention belongs to the field of application science and technology of organic photoelectric materials, and particularly relates to a terpyridine derivative and a preparation method and application thereof as well as a device. The derivative provided by the invention is characterized by being mainly based on a terpyridine core, peripherally using a carbazole derivative and the like to regulate appropriate electron donating ability, and transforming different bridging groups through a D-A structure design to regulate the appropriate distribution of highest occupied molecular orbital (HOMO)and lowest unoccupied molecular orbital (LUMO); the derivative is mainly applied to TADF guest materials, host materials and carrier transport materials.
