Recently I am researching about LIGHT-EMITTING-DIODES; CHARGE-TRANSFER; THIOXANTHONE DERIVATIVES; MOLECULAR DESIGN; ACCEPTOR; PHOTOLUMINESCENCE; IMPACT; OLEDS, Saw an article supported by the National Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [61420106002, 51373189, 21772209]; National Key Research and Development Project [2016YFB0401004]; National Program for Support of Top-notch Young Professionals. Published in WILEY-V C H VERLAG GMBH in WEINHEIM ,Authors: Wei, XF; Li, ZY; Hu, TP; Duan, RH; Liu, JJ; Wang, RF; Liu, YW; Hu, XX; Yi, YP; Wang, PF; Wang, Y. The CAS is 50-84-0. Through research, I have a further understanding and discovery of 2,4-Dichlorobenzoic acid. Safety of 2,4-Dichlorobenzoic acid
Four donor-acceptor-donor region isomers (2,3-TXO-PhCz, 2,6-TXO-PhCz, 2,7-TXO-PhCz, and 3,6-TXO-PhCz) are designed. The substitution positions of the two PhCz units significantly impact the photophysical properties of the isomers, especially for the singlet-triplet energy splitting (Delta E-ST) and oscillator strength (f ). 2,3-TXO-PhCz exhibits weak emission due to the large steric hindrance of the two PhCz units. While 2,6-TXO-PhCz, 2,7-TXO-PhCz, and 3,6-TXO-PhCz all exhibit strong emission. The four emitters possess small Delta E-ST of 0.01-0.24 eV; the corresponding f values are 0.064, 0.107, 0.026, and 0.134. Consequently, the photoluminescence quantum yields (PLQYs) of the doped films in CBP host are: 62.1% for 2,3-TXO-PhCz, 83.8% for 2,6-TXO-PhCz, 89.0% for 2,7-TXO-PhCz, and 85.4% for 3,6-TXO-PhCz. Although notable divergences of f and Delta E-ST exist between 2,6-TXO-PhCz and 2,7-TXO-PhCz, similar PLQY of doped film in the CBP host, and exciton utilization and external quantum efficiency (EQE) of the corresponding devices can be achieved: 2,6-TXO-PhCz and 2,7-TXO-PhCz endow the organic light-emitting devices with high EQE of 23.2% and 24.4%. This proximity can be attributed to the synergistic effect of f and Delta E-ST. This finding highlights the beneficial role of the different linking positions on the acceptor unit in facilitating the adjustment of f and Delta E-ST in order to improve the device efficiency.
Safety of 2,4-Dichlorobenzoic acid. About 2,4-Dichlorobenzoic acid, If you have any questions, you can contact Wei, XF; Li, ZY; Hu, TP; Duan, RH; Liu, JJ; Wang, RF; Liu, YW; Hu, XX; Yi, YP; Wang, PF; Wang, Y or concate me.
Reference:
Chloride – Wikipedia,
,Chlorides – an overview | ScienceDirect Topics