In 2022,Luo, Xu-Feng; Ni, Hua-Xiu; Ma, Hui-Li; Qu, Zhong-Ze; Wang, Jie; Zheng, You-Xuan; Zuo, Jing-Lin published an article in Advanced Optical Materials. The title of the article was 《Fused π-Extended Multiple-Resonance Induced Thermally Activated Delayed Fluorescence Materials for High-Efficiency and Narrowband OLEDs with Low Efficiency Roll-Off》.Computed Properties of C6H7BO3 The author mentioned the following in the article:
The simultaneous achievement of multiple-resonance thermally activated delayed fluorescence (MR-TADF) materials with strong narrowband emission and efficient reverse intersystem crossing (RISC) process can further promote the advancement of organic light-emitting diodes (OLEDs). Herein, a new strategy is proposed to achieve two π-extended MR-TADF emitters (NBO and NBNP) peaking at 487 and 500 nm via fusing conjugated high-triplet-energy units (carbazole, dibenzofuran) into boron-nitrogen (B/N) framework, aiming to increase charge transfer delocalization of the B/N skeleton and minimize singlet-triplet energy gap (ΔEST). This strategy endows the two emitters with full width at half maximum of 27 and 29 nm, and high photoluminescence efficiencies above 90% in doped films, resp. Addnl., considerable rate constants of RISC are obtained due to the small ΔEST (0.12 and 0.09 eV) and large spin-orbital coupling values. Consequently, the OLEDs based on NBO and NBNP show the maximum external electroluminescence quantum efficiency of up to 26.1% and 28.0%, resp., accompanied by low-efficiency roll-off. These results provide a feasible design strategy to construct efficient MR-TADF materials for OLEDs with suppressed efficiency roll-off. In the experiment, the researchers used 2-Hydroxyphenylboronic acid(cas: 89466-08-0Computed Properties of C6H7BO3)
2-Hydroxyphenylboronic acid(cas: 89466-08-0) belongs to acyl phenylboronic acid. Phenylboronic acid (PBA) has been used to extract β-blockers (a class of aminoalcohol-containing drugs) from aqueous solution, rat, and human plasma. Computed Properties of C6H7BO3
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