蒋佐权教授、周东营副教授及其合作者在angew. chem. int. ed.上发表论文-尊龙凯时

作者：

yue-jian yang^1,2#, denis ari^3#, zhe-hong yu^1,2#, kelvine letellier^3#, olivier jeannin^3#, qi zheng^1,2#, aziz khan^1,2#, cassandre quinton^3#, dong-ying zhou^1,2*, zuo-quan jiang^1,2* & cyril poriel³*

单位：

¹institute of functional nano & soft materials (funsom), joint international research laboratory of carbon-based functional materials and devices, soochow university, suzhou, 215123, jiangsu, pr china.

²jiangsu key laboratory for carbon-based functional materials &devices, soochow university, suzhou, 215123, jiangsu, pr china.

³univ rennes, cnrs, iscr-umr cnrs 6226, f-35000 rennes.

摘要：

pure hydrocarbon (phc) materials are a class of highly efficient and stable host materials for organic light-emitting diodes (oleds), composed solely of carbon and hydrogen atoms. despite recent great advancements in phc research, their applications are still mainly limited to phosphorescent oleds (pholeds). high-performance blue oleds still pose a considerable challenge. thus, expanding phc materials into other types of oleds is critical for advancing organic electronic technologies. in this study, we designed a series of original high-triplet phc materials based on a multi-substitution approach of the 9,9′-spirobifluorene (sbf) backbone and used them, for the first time, as a host in phosphorescence-sensitized multi-resonance thermally activated delayed fluorescence (mr-tadf) oleds. devices based on the 2,6-bis(3,6-di-tert-butyl-9h-carbazol-9-yl)boron (dtbuczb) emitter, using firpic or fac-ir(tpz)₃ as the sensitizer, achieved high maximum external quantum efficiency (eqe_max) values ranging from 29.1% to 33.9%. additionally, blue mr-tadf oled devices based on v-dabna with a phosphorescent sensitizer (cn−ir), demonstrated outstanding electroluminescent performance, with an eqe_max of approximately 31% due to an excellent molecular orientation induced by the phc hosts. all devices exhibited narrow full-width at half-maximum spectra and minimal efficiency roll-off. this study marks the first application of phc materials as hosts in phosphorescence-sensitized mr-tadf oleds, highlighting their potential as promising candidates for next-generation blue oleds and offering a viable pathway to achieve high-performance devices.

影响因子：

16.1

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一区

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