Sun, Bangjin; Tong, Kai-Ning; Chen, Xing; He, Jian-Li; Liu, Han; Fung, Man-Keung; Fan, Jian published an article in 2021. The article was titled 《A universal thermally activated delayed fluorescent host with short triplet lifetime for highly efficient phosphorescent OLEDs with extremely low efficiency roll-off》, and you may find the article in Journal of Materials Chemistry C: Materials for Optical and Electronic Devices.Product Details of 768-35-4 The information in the text is summarized as follows:
Triplet-involved quenching processes lead to significant efficiency roll-off in phosphorescent organic light-emitting diodes (OLEDs). Thermally activated delayed fluorescent (TADF) materials can reduce the triplet exciton d. in the emitting layer (EML) via the up-conversion of triplet into singlet exciton. However, the effect of the triplet lifetime of TADF hosts on efficiency roll-off is still under-researched. Inspired by the fast spin-flip process in TADF with a small singlet-triplet energy gap, we herein reported a triazine-carbazole hybrid (Trz-PhCz) with a short triplet lifetime, and extremely low efficiency roll-offs were achieved for green, yellow, orange and red OLEDs with external quantum efficiencies (EQEs) over 20% at 10 000 cd m-2. Particularly, the optimized orange device showed a record-high maximum EQE of 31.4%, and 25.5% at 10 000 cd m-2. Furthermore, unprecedented high PEmaxs of 111.8 lm W-1 and 98.9 lm W-1 were obtained for Ir(ppy)2(acac)- and PO-01-based devices, resp. Notably, a two-color white OLED based on a single host Trz-PhCz also showed a remarkably high maximum power efficiency (PEmax) of 102.5 lm W-1 with the Commission Internationale de l’Eclairage (CIE) of (0.42, 0.48). So, the Trz-PhCz-hosted phosphorescent OLEDs showed state-of-the-art device performance, and this work provided insight into the design of efficient TADF host materials via controlling their triplet lifetime for practical applications. After reading the article, we found that the author used (3-Fluorophenyl)boronic acid(cas: 768-35-4Product Details of 768-35-4)
(3-Fluorophenyl)boronic acid(cas: 768-35-4) can be used to make novel liquid crystalline fluorobiphenylcyclohexenes and difluoroterphenyls by palladium-catalyzed cross-couplings also used in the synthesis of o-phenylphenols as potent leukotriene B4 receptor agonists.Product Details of 768-35-4
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics