摘要
以蒽作为三线态‐三线态湮灭(TTA)型蓝光材料的基元,通过在蒽的9和10位分别引入弱给电子基团二苯并噻吩和弱吸电子基团苯氰,设计合成了两个给体‐受体型深蓝光TTA材料4‐(10‐(二苯并[b,d]噻吩‐4‐基)蒽‐9‐基)苯腈(2)和4‐(10‐(二苯并[b,d]噻吩‐2‐基)蒽‐9‐基)苯腈(3),并对它们的热稳定性、电化学性质、光物理性质及电致发光性质进行了系统表征。在纯膜状态下,两个化合物的光致发光峰分别位于445 nm和451 nm处,光致发光量子产率分别为40.2%和57.9%。基于化合物2和3的非掺杂器件的电致发光峰分别位于448 nm和458 nm处,实现了深蓝光发射。两个器件获得了较好的发光效率,其最大电流效率分别为4.2 cd·A^(-1)和6.9 cd·A^(-1),最大功率效率分别为2.3 lm·W^(-1)和3.6 lm·W^(-1),最大外量子效率分别为3.8%和5.6%。即使在1 000 cd·m^(-2)亮度下,两个器件的外量子效率依然保持在3.7%和5.4%,表现出极低的效率滚降。
Using anthracene as the basic unit of triplet-triplet annihilation(TTA)blue light materials,two donor-acceptor deep blue TTA materials 4-(10-(dibenzo[b,d]thiophen-4-yl)anthracen-9-yl)benzonitrile(2)and 4-(10-(dibenzo[b,d]thiophen-2-yl)anthracen-9-yl)benzoni-trile(3)were designed and synthesized by introducing dibenzo‐thiophene,a weak electron-donating group,and benzonitrile,a weak electron-withdrawing group into the 9th and 10th positions of anthracene,respectively.Their thermal stability,electrochemical properties,photophysical properties and electroluminescent properties were systematically characterized.The photoluminescence peaks of the two compounds are located at 445 nm and 451 nm,and the photoluminescence quantum yields are 40.2%and 57.9%,respectively.The electroluminescent peaks of the undoped devices based on compounds 2 and 3 are located at 448 nm and 458 nm,respectively,realizing deep blue light emission.The two devices have good luminous efficiency,and their maximum current efficiency is 4.2 cd·A^(-1)and 6.9 cd·A^(-1),respectively.The maximum power efficiency is 2.3 lm·W^(-1) and 3.6 lm·W^(-1),and the maximum external quantum efficiency is 3.8%and 5.6%,respectively.Even at the brightness of 1000 cd·m^(-2),the external quantum efficiency of the two devices remains at 3.7%and 5.4%,showing a very low efficiency roll-off.
作者
张越华
邢龙江
聂飞
陈文铖
穆英啸
彭少洪
何念
孙宇曦
曾庆明
霍延平
ZHANG Yuehua;XING Longjiang;NIE Fei;CHEN Wencheng;MU Yingxiao;PENG Shaohong;HE Nian;SUN Yuxi;ZENG Qingming;HUO Yanping(Guangzhou City Polytechnic,Guangzhou 510405,China;School of Light Industry and Chemical Engineering,Guangdong University of Technology,Guangzhou 510006,China;Guang Dong Shuo Cheng Technology Co.,Ltd,Shaoguan 512600,China;Analysis and Test Center,Guangdong University of Technology,Guangzhou 510006,China)
出处
《发光学报》
EI
CAS
CSCD
北大核心
2024年第2期269-279,共11页
Chinese Journal of Luminescence
基金
国家自然科学基金(U2001222,U22A20399,52003058,21975055)
广东省基础与应用基础研究基金(2019B1515120035,2021A1515010607)
广东省普通高校重点领域专项(2023ZDZX2083)。
关键词
蒽
二苯并噻吩
苯氰
深蓝光TTA材料
anthracene
dibenzothiophene
benzonitrile
deep blue TTA material
