基于萘环稠合策略构筑间位双硼类纯绿光窄光谱发光材料  

Narrowband pure-green emitters based on naphthalene-fused meta-positioned double boron framework

作　　者：李祯龙 李治 张硕 刘旻昊 高戈 游劲松 宾正杨 Zhenlong Li;Zhi Li;Shuo Zhang;Minhao Liu;Ge Gao;Jingsong You;Zhengyang Bin(Key Laboratory of Green Chemistry and Technology of Ministry of Education,College of Chemistry,Sichuan University,Chengdu,610064,China)

机构地区：[1]Key Laboratory of Green Chemistry and Technology of Ministry of Education,College of Chemistry,Sichuan University,Chengdu,610064,China

出　　处：《Science China Materials》2024年第5期1581-1587,共7页中国科学（材料科学）（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(22275127,22031007 and 21772134)。

摘　　要：硼氮多重共振(MR)发光材料在宽色域有机发光二极管(OLEDs)中具有重要应用前景,因此受到广泛关注.其中,间位双硼骨架凭借其高效率和极窄的发光光谱,在蓝光发光材料的构筑中已展现出独特优势,但如何基于间位双硼骨架构筑绿光窄光谱发光分子却鲜有报道.本论文基于萘环稠合策略设计并合成了绿光发光分子BN-NAP和BNANAP,其最大发射峰分别为511和518 nm,并保持了窄光谱发光性质,其发光半峰宽(FWHM)仅为26和20 nm.利用BN-ANAP作为发光材料制备得到纯绿光OLED器件,其CIE坐标为[026,067],最大外量子效率(EQEmax)为21.0%,同时具有较小的效率滚降.Pure organic boron/nitrogen(B/N)-containing multiple resonance(MR)materials are very attractive emitters for the fabrication of narrowband organic light-emitting diodes(OLEDs).Recently,v-DABNA,having a meta-positioned double boron framework,has gained prominent recognition for its unprecedented narrowband blue emission at 468 nm.Therefore,creating narrowband green emitters by modification this particular framework is regarded as a promising endeavor.Herein,we showcase two narrowband emitters named BN-NAP and BN-ANAP,emitting green light at 511 and 518 nm with small full-width at half-maximum(FWHM)of 26 and 20 nm,respectively.Their synthesis by the fusion of the meta-positioned double boron framework with two naphthalene moieties is proven to be a simple yet effective tactic to red-shift emissions while keeping small FWHM.Utilizing BN-ANAP as the emitter,high-performance narrowband pure-green OLEDs have been assembled,achieving a maximum external quantum efficiency(EQEmax)as high as 21.0%with small efficiency roll-off and Commission International de l’Éclairage(CIE)coordinates of[026,067].

关 键 词：multiple resonance narrowband emitter pure-green emission organic light-emitting diodes 

分 类 号：TB34[一般工业技术—材料科学与工程] TN383.1[电子电信—物理电子学]