摘要
高效率窄光谱蓝色有机电致发光器件(OLED)是柔性显示领域的研究重点之一。本文以二萘并[2,3-B∶2′,3′-D]呋喃为弱电子受体、N-(4-联苯基)-1-萘胺作为电子给体设计合成了一种D-A-D型蓝光分子DPF-NA,其在正己烷溶液中的发射峰位于441 nm。理论计算与光物理测试结果显示DPF-NA具有杂化局域电荷转移激发态(HLCT)特性,兼具局域态(LE)高发光效率与电荷转移态(CT)高激子利用率特征,在二氯甲烷溶液中的光致发光量子效率(PLQY)为81.2%。基于质量分数3%DPF-NA掺杂浓度的OLED器件电致发光(EL)峰位于455 nm,半峰宽(FWHM)仅为26 nm,CIE(x,y)坐标为(0.14,0.08),最大外量子效率(EQEmax)为6.76%。
High-efficiency narrow-emission blue organic light-emitting device(OLED)is one of the research hot-spots in the field of flexible display.In this paper,a D-A-D blue molecule,DPF-NA was designed and synthesized by using dinaphthyl[2,3-B∶2′,3′-D]furan as a weak electron acceptor and N-(4-biphenylyl)-1-naphthylamine as electron donors.The moleculeshows a photoluminescence(PL)peak at 441 nm in n-hexane solution.Theoretical calculations and photophysical measurements show that DPF-NA possesses hybridized localized charge transfer(HLCT)excited state characteristics,combining high luminescence efficiency of the localized state(LE)and high exciton utilization of the charge transfer(CT)state.As a consequence,the molecule shows a high PL photolumines-cence quantum efficiency(PLQY)of 81.2%in dichloromethane solution.OLED devices based on the DPF-NA film(with a doping concentration of 3%(mass fraction))has an electroluminescence(EL)peak located at 455 nm,with a small full width at half maximum(FWHM)of 26 nm.The CIE coordinates are(0.14,0.08),and the maximum external quantum efficiency(EQEmax)is 6.76%.
作者
王小伟
袁江波
马佩兰
闫自强
崔志远
孙军
彭其明
WANG Xiaowei;YUAN Jiangbo;MA Peilan;YAN Ziqiang;CUI Zhiyuan;SUN Jun;PENG Qiming(Xi’an Manareco New Materials Co.,Ltd.,Xi’an 710077,China;Institute of Advanced Materials,Nanjing Tech University,Nanjing 211816,China)
出处
《发光学报》
EI
CAS
CSCD
北大核心
2024年第9期1503-1510,共8页
Chinese Journal of Luminescence
基金
西安市科技计划项目(23LLRHZDZX0016)
国家自然科学基金(62022040,51972171)。
