Ma, Zhihua; Dong, Wenyue; Hou, Jianhua; Duan, Qian; Shao, Shiyang; Wang, Lixiang published an article in 2019, the title of the article was Dendritic host materials with non-conjugated adamantane cores for efficient solution-processed blue thermally activated delayed fluorescence OLEDs.Reference of 1,3,5,7-Tetrakis(4-iodophenyl)adamantane And the article contains the following content:
Two dendritic host materials consisting of non-conjugated adamantane cores and four first-/second-generation carbazole dendrons (Ad-4D1 and Ad-4D2) are developed for efficient solution-processed blue thermally activated delayed fluorescence (TADF) organic light-emitting diodes (OLEDs). The dendrimers with three-dimensional geometries, which are constructed through facile one-step palladium-catalyzed C-N coupling reactions involving tetra-substituted adamantane and carbazole dendrons, show high thermal stability and excellent solubility in common organic solvents. The dendrimers possess high triplet energies (ETs) of 2.83-2.95 eV, making them suitable to host blue TADF emitters. Compared with Ad-4D1 with the first-generation dendrons showing a deep HOMO (HOMO) level of -5.51 eV, Ad-4D2 with the second-generation ones exhibits an elevated HOMO level of -5.32 eV, favorable for hole injection from anode to the emissive layer. Solution-processed blue TADF OLEDs utilizing Ad-4D2 as a host exhibit promising device performance with a maximum luminous efficiency, power efficiency and external quantum efficiency of 44.2 cd A-1, 34.4 lm W-1 and 18.3%, resp., among the highest values for solution-processed blue TADF OLEDs. This work sheds light on the development of dendritic host materials, as an alternative to soluble small-mol. hosts and polymer hosts, to realize high-efficiency solution-processed TADF OLEDs. The experimental process involved the reaction of 1,3,5,7-Tetrakis(4-iodophenyl)adamantane(cas: 144970-30-9).Reference of 1,3,5,7-Tetrakis(4-iodophenyl)adamantane
The Article related to nonconjugated adamantane core dendritic host material tadf oled, Optical, Electron, and Mass Spectroscopy and Other Related Properties: Spectrometers and Optical Apparatus and other aspects.Reference of 1,3,5,7-Tetrakis(4-iodophenyl)adamantane
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