《Exciton efficiency beyond the spin statistical limit in organic light emitting diodes based on anthracene derivatives》 was written by Sharma, Nidhi; Wong, Michael Yin; Hall, David; Spuling, Eduard; Tenopala-Carmona, Francisco; Privitera, Alberto; Copley, Graeme; Cordes, David B.; Slawin, Alexandra M. Z.; Murawski, Caroline; Gather, Malte C.; Beljonne, David; Olivier, Yoann; Samuel, Ifor D. W.; Zysman-Colman, Eli. Related Products of 523-27-3 And the article was included in Journal of Materials Chemistry C: Materials for Optical and Electronic Devices in 2020. The article conveys some information:
We report two donor-acceptor (D-A) materials based on a cyanoanthracene acceptor paired with diphenylamine (DPAAnCN) and carbazole (CzAnCN) donor moieties. These compounds show hybrid locally excited (LE) charge-transfer (CT) excited states (HLCT), which we demonstrated through a combined photophys. and computational study. Vacuum-deposited organic light emitting diodes ( OLEDs ) using these HLCT emitters exhibit maximum external quantum efficiencies (EQEmax) close to 6%, with impressive exciton utilization efficiency (Φs) of >50%, far exceeding the spin statistic limit of 25%. We rule out triplet-triplet annihilation and thermally activated delayed fluorescence as triplet harvesting mechanisms along with horizontal orientation of emitters to enhance light outcoupling and, instead, propose a “”hot exciton”” channel involving the nearly isoenergetic T2 and S1 states. In addition to this study using 9,10-Dibromoanthracene, there are many other studies that have used 9,10-Dibromoanthracene(cas: 523-27-3Related Products of 523-27-3) was used in this study.
9,10-Dibromoanthracene(cas: 523-27-3) is synthesized by the bromination of anthracene. The bromination reaction is carried out at room temperature using carbon tetrachloride as a solvent. Using 80-85% anthracene as raw material, adding bromine to react for half an hour, the yield is 83-88%.Related Products of 523-27-3
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary