硼氮基MR-TADF窄谱带有机发光二极管材料的研究进展
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摘要：
窄谱带有机发光二极管对于宽色域超清视频显示具有重要意义.传统热致延迟荧光(TADF)材料通常具有较大的发射光谱半峰宽,阻碍了其在宽色域超高清显示上的应用.最近,一种新型的多重共振型热致延迟荧光(MR-TADF)材料因可以有效解决色纯度问题而受到学者的广泛关注.其刚性的共轭骨架能够抑制分子激发态的结构弛豫以及激发态与基态间的振动耦合,获得较窄光谱半峰宽.目前MR-TADF材料体系大致包含硼氧、硼氮、羰基氮以及吲哚咔唑4种.相较于其他三类,硼氮体系结构修饰更强,半峰宽更窄,且具有强热致延迟荧光特性.因此,主要讨论硼氮基MR-TADF材料,分别从苯胺类和咔唑类外围取代基对多重共振核心的影响、基于硼氮原子相对位置和数量调控以及杂原子引入对MR-TADF材料的影响等方面,对其分子结构和光电性能进行总结、分析和展望.
Narrowband emission organic light emitting diode are of great significance for wide color gamut ultra-high definition displays.Traditional thermally activated delayed fluorescence(TADF) materials often exhibit broad emission spectra,which limit their application in wide color gamut ultra-high definition displays.Recently,a novel type of multiple resonance-based thermally activated delayed fluorescence(MR-TADF)materials has attracted widespread attention due to their effective color purity.The rigid conjugated framework of MR-TADF materials suppresses structural relaxation of the excited states and the vibrational coupling between the excited and ground states,resulting in narrower emission spectra.Currently,the MR-TADF material systems mainly include boron oxygen,boron nitrogen,carbonyl nitrogen,and indolocarbazole.Among these,the boron nitrogen system exhibits stronger structural modification,narrower emission spectra,and pronounced thermally activated delayed fluorescence characteristics.Therefore,this paper mainly focused on discussing boron nitrogen-based MR-TADF materials,summarizing and analyzing their molecular structures and optoelectronic properties from the perspectives of peripheral substituents on the phenylamine and carbazole resonance cores,regulation based on the relative positions and quantities of boron nitrogen atoms,and the influence of heteroatom introduction.
作者：
王磊 苏晗瑞 王亚雄
Wang Lei;Su Hanrui;Wang Yaxiong(Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan 430074,China)
机构地区：
华中科技大学武汉光电国家研究中心
出处：
《betway官方app 学报:自然科学版》 CAS 北大核心 2023年第5期14-29,I0003,F0002,共18页
Journal of Henan Normal University(Natural Science Edition)
基金：
国家自然科学基金(62004074,51727809) 湖北省重点研发计划项目(2022BAA015,2021AAA008,2020BAA016)。
关键词：
有机发光二极管 硼氮体系 窄谱带发射 多重共振效应 热致延迟荧光
organic light emitting diode Boron-Nitrogen system narrowband emission multi-resonance effects thermally activated delayed fluorescence
分类号：
TN312.8 [电子电信—物理电子学]
