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Achieving Efficient Violet-blue Organic Light Emitting Devices （CIE
增强出版y =0.046） by Extending π-conjugation in D-π-A Structure- Chinese Journal of Luminescence Vol. 43, Issue 7, Pages: 1102-1113(2022)
- 作者机构：
1.太原理工大学 新材料界面科学与工程教育部重点实验室， 山西 太原 030024
2.山西⁃浙大先进材料与化学工程研究所， 山西 太原 030024
3.电子科技大学光电信息学院 电子薄膜与集成器件国家重点实验室， 四川 成都 610054
- 作者简介：
- 基金信息：山西省留学基金项目(2020⁃049)
DOI：10.37188/CJL.20220093
CLC：
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Jiang-feng CUI, Jing SUN, Guo-liang WANG, et al. Achieving Efficient Violet-blue Organic Light Emitting Devices （CIE
y =0.046） by Extending π-conjugation in D-π-A Structure. [J]. Chinese Journal of Luminescence 43(7):1102-1113(2022)Jiang-feng CUI, Jing SUN, Guo-liang WANG, et al. Achieving Efficient Violet-blue Organic Light Emitting Devices （CIE
y =0.046） by Extending π-conjugation in D-π-A Structure. [J]. Chinese Journal of Luminescence 43(7):1102-1113(2022) DOI： 10.37188/CJL.20220093.
摘要
紫蓝光有机发光材料在全彩显示和照明领域具有广阔的应用前景。但是该类材料需要宽能隙，因此开发高效的紫蓝色材料是一项巨大的挑战。本文利用10H⁃吩噻嗪5，5⁃二氧化物（2OPTZ）作为弱受体、N⁃苯基⁃2⁃萘胺（PNA）作为供体，设计合成了两个具有D⁃π⁃A型结构的紫蓝色材料，命名为2OPTZ⁃PNA和2OPTZ⁃BP⁃PNA。通过延长给受体之间的π共轭长度，使局域态和电荷转移态被优化，并且薄膜中的绝对量子产率从14%提高到33%。此外，利用2OPTZ⁃BP⁃PNA制备的非掺杂器件呈现紫蓝光（436 nm）发射，半峰全宽为54 nm，色坐标为（0.155，0.046），外量子效率为4.1%。鉴于此，本文提供了一种制备高质量紫蓝发光材料的有效策略。
Abstract
Organic violet-blue luminescent materials have exhibited great potential in full-color displaying and lighting fields. However， it is a huge challenge to develop efficient violet-blue emitters because of the inherently wide energy gap. In this work， two violet-blue emitters with donor （D）-π-acceptor （A） type using 10H-phenothiazine 5，5-dioxide （2OPTZ） as a weak acceptor and N-（2-naphthyl） aniline （PNA） as the donor， namely 2OPTZ-PNA and 2OPTZ-BP-PNA， were designed and synthesized. By extending π-conjugation length between donor and acceptor， local excited states and charge transfer excited states were adjusted， and absolute photoluminescence quantum yields （PLQYs） values in the evaporated film increased from 14% to 33%. Notably， non-doped device based 2OPTZ-BP-PNA exhibits violet-blue light at 436 nm with a narrow full width at half-maximum （FWHM） of 54 nm， Commission Internationale de l’Eclairage （CIE） coordinates of （0.155， 0.046） and external quantum efficiency （EQE） of 4.1%. Given this， our results provide an efficient design strategy for the high-quality violet-blue luminescent materials.
关键词
有机发光二极管紫蓝色二氧化吩噻嗪D-π-A结构π共轭长度
Keywords
organic light-emitting diodes（OLED）violet-bluephenothiazine dioxideD-π-A structureπ-conjugation length
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