张晓宏教授、王凯教授及其合作者在adv. mater.上发表论文-尊龙凯时

作者：

dong-yang chen^1,2*, hui wang¹, dian-ming sun², sen wu², kai wang^1,3*, and xiao-hong zhang^1,4*, eli zysman-colman²*

单位：

¹institute of functional nano & soft materials (funsom), collaborative innovation center of suzhou nanoscience and technology, soochow university, 199 ren-ai road, suzhou 215123, china.

²organic semiconductor centre eastchem school of chemistry, university of st andrews, st andrews, fife ky16 9st, uk.

³jiangsu key laboratory for carbon-based functional materials & devices, soochow university, suzhou, 215123, jiangsu, p.r. china.

⁴jiangsu key laboratory of advanced negative carbon technologies, soochow university, suzhou, 215123, jiangsu, p.r. china.

摘要：

here the utility and potential of an emitter design are demonstrated, consisting of a narrowband-emitting multiresonant thermally activated delayed fluorescent (mr-tadf) core that is decorated with a suitably higher energy donor-acceptor tadf moiety. not only does this d–a tadf group offer additional channels for triplet exciton harvesting and confers faster reverse intersystem crossing (risc) kinetics but it also acts as a steric shield, insulating the emissive mr-tadf core from aggregation-caused quenching. two emitters, dtczbn-cnbt1 and dtczbn-cnbt2, demonstrate enhanced photophysical properties leading to outstanding performance of the organic light-emitting diodes (oleds). dtczbn-cnbt2, containing a d–a tadf moiety, has a faster k_risc (1.1 × 10⁵ s⁻¹) and higher photoluminescence quantum yield (φ_pl: 97%) compared to dtczbn-cnbt1 (0.2 × 10⁵ s⁻¹, φ_pl: 90%), which contains a d–a moiety that itself is not tadf. the sensitizer-free oleds with dtczbn-cnbt2 achieve a record-high maximum external quantum efficiency (eqe_max) of 40.2% and showed milder efficiency roll-off (eqe₁₀₀₀ of 20.7%) compared to the dtczbn-cnbt1-based devices (eqe_max of 37.1% and eqe₁₀₀₀ of 11.9%).

影响因子：

27.4

分区情况：

一区

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