Enhanced Thermally Activated Delayed Fluorescence by Sole Coordination: From an Organic Molecule to Its Zinc Complex

IF 4.8 2区化学 Q2 CHEMISTRY, PHYSICAL The Journal of Physical Chemistry Letters Pub Date : 2024-07-01 DOI:10.1021/acs.jpclett.4c01472

Hao Deng, Tao Wang, Yuannan Chen, Kunkun Dou, Xuejing Liu*, Chenyang Zhao, Hongmei Zhan, Chuluo Yang*, Chuanjiang Qin and Yanxiang Cheng*,

{"title":"Enhanced Thermally Activated Delayed Fluorescence by Sole Coordination: From an Organic Molecule to Its Zinc Complex","authors":"Hao Deng, Tao Wang, Yuannan Chen, Kunkun Dou, Xuejing Liu*, Chenyang Zhao, Hongmei Zhan, Chuluo Yang*, Chuanjiang Qin and Yanxiang Cheng*, ","doi":"10.1021/acs.jpclett.4c01472","DOIUrl":null,"url":null,"abstract":"A BPAPTPyC organic molecule containing a sandwich structural chromophore is designed and synthesized to produce blue thermally activated delayed fluorescence (TADF). The chromophore is composed of two di(4-tert-butylphenyl)amino donors and one inserted terpyridyl acceptor hitched at positions 1, 8, and 9 of a single carbazole via the p-phenylene group, in which the multiple space π–π interactions between the donor and acceptor enable the molecule to possess the TADF feature with a high energy emission at 470 nm but a low photoluminescence quantum yield (PLQY) and a small proportion of the delayed component. In contrast, the corresponding Zn(BPAPTPyC)Cl2 complex has a high PLQY and a short lifetime with a red-shifted emission due to the enhanced rigidity and electron accepting ability of the terpyridyl group from coordination. A solution-processed organic light-emitting diode (OLED) based on the complex achieves a maximum external quantum efficiency (EQE) of 17.9% with an emission peak at 585 nm, while an OLED of the organic molecule produces blue emission with a maximum EQE of 2.7%.","PeriodicalId":62,"journal":{"name":"The Journal of Physical Chemistry Letters","volume":null,"pages":null},"PeriodicalIF":4.8000,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"The Journal of Physical Chemistry Letters","FirstCategoryId":"1","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acs.jpclett.4c01472","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

Abstract

A BPAPTPyC organic molecule containing a sandwich structural chromophore is designed and synthesized to produce blue thermally activated delayed fluorescence (TADF). The chromophore is composed of two di(4-tert-butylphenyl)amino donors and one inserted terpyridyl acceptor hitched at positions 1, 8, and 9 of a single carbazole via the p-phenylene group, in which the multiple space π–π interactions between the donor and acceptor enable the molecule to possess the TADF feature with a high energy emission at 470 nm but a low photoluminescence quantum yield (PLQY) and a small proportion of the delayed component. In contrast, the corresponding Zn(BPAPTPyC)Cl₂ complex has a high PLQY and a short lifetime with a red-shifted emission due to the enhanced rigidity and electron accepting ability of the terpyridyl group from coordination. A solution-processed organic light-emitting diode (OLED) based on the complex achieves a maximum external quantum efficiency (EQE) of 17.9% with an emission peak at 585 nm, while an OLED of the organic molecule produces blue emission with a maximum EQE of 2.7%.

Abstract Image

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

通过单独配位增强热激活延迟荧光：从有机分子到锌配合物。

设计并合成了一种含有夹心结构发色团的 BPAPTPyC 有机分子，可产生蓝色热激活延迟荧光（TADF）。该发色团由两个二（4-叔丁基苯基）氨基供体和一个插入的terpyridyl受体组成，供体和受体之间的多重空间π-π相互作用使该分子在 470 纳米波长处具有高能量发射的 TADF 特性，但光致发光量子产率（PLQY）较低，延迟成分比例较小。相比之下，相应的 Zn（BPAPTPyC）Cl2 复合物具有较高的光量子产率和较短的寿命，并且由于配位增强了terpyridyl 基团的刚性和电子接受能力而产生了红移发射。基于该配合物的溶液加工有机发光二极管（OLED）的最大外部量子效率（EQE）为 17.9%，发射峰值为 585 nm，而有机分子的 OLED 发出的蓝光最大 EQE 为 2.7%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文去求助

来源期刊

The Journal of Physical Chemistry Letters CHEMISTRY, PHYSICAL-NANOSCIENCE & NANOTECHNOLOGY

CiteScore

9.60

自引率

7.00%

发文量

1519

审稿时长

1.6 months

期刊介绍： The Journal of Physical Chemistry (JPC) Letters is devoted to reporting new and original experimental and theoretical basic research of interest to physical chemists, biophysical chemists, chemical physicists, physicists, material scientists, and engineers. An important criterion for acceptance is that the paper reports a significant scientific advance and/or physical insight such that rapid publication is essential. Two issues of JPC Letters are published each month.