Acceptor-σ-donor-σ-acceptor host material for red phosphorescent and thermally activated delayed fluorescent OLEDs

IF 2.7 4区工程技术 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Organic Electronics Pub Date : 2024-05-23 DOI:10.1016/j.orgel.2024.107072

Meng-Tian Li , Zhi-Hao Qu , Ruihong Liu , Yue-Jian Yang , Peng Zuo , Liang-Sheng Liao , Zuo-Quan Jiang

{"title":"Acceptor-σ-donor-σ-acceptor host material for red phosphorescent and thermally activated delayed fluorescent OLEDs","authors":"Meng-Tian Li , Zhi-Hao Qu , Ruihong Liu , Yue-Jian Yang , Peng Zuo , Liang-Sheng Liao , Zuo-Quan Jiang","doi":"10.1016/j.orgel.2024.107072","DOIUrl":null,"url":null,"abstract":"<div><p>A novel bipolar host molecule di-spiro [fluorene-9,5′-quinolino [3,2,1-de] acridine-9′,9″-fluorene]-2,2″,7,7″-tetracarbonitrile (QACN) featuring an Acceptor-σ-Donor-σ-Acceptor structure was developed. Systematic investigations into its photophysical, electrochemical, and thermal properties unveiled exceptional thermal stability, a three-dimensional spatial configuration, and bipolar carrier transport capability. Employing QACN as the host material in red phosphorescent and thermally activated delayed fluorescent (TADF) organic light-emitting diodes (OLEDs) yielded a maximum external quantum efficiency of 25.3 % and 16.5 %, respectively. Compared with the commercial material TPBi (EQE = 12.0 %, λ<sub>EL</sub> = 668 nm) and mCP (EQE = 14.5 %, λ<sub>EL</sub> = 652 nm), the TADF OLEDs based on QACN achieved a higher EQE and a large red-shift emission (EQE = 16.5 %, λ<sub>EL</sub> = 694 nm). These findings underscore the potential of QACN as an effective host material for red phosphorescent and TADF emitters and provide a new auxiliary finesse for realizing deep red and near-infrared (NIR) OLEDs.</p></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"130 ","pages":"Article 107072"},"PeriodicalIF":2.7000,"publicationDate":"2024-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Organic Electronics","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1566119924000831","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

A novel bipolar host molecule di-spiro [fluorene-9,5′-quinolino [3,2,1-de] acridine-9′,9″-fluorene]-2,2″,7,7″-tetracarbonitrile (QACN) featuring an Acceptor-σ-Donor-σ-Acceptor structure was developed. Systematic investigations into its photophysical, electrochemical, and thermal properties unveiled exceptional thermal stability, a three-dimensional spatial configuration, and bipolar carrier transport capability. Employing QACN as the host material in red phosphorescent and thermally activated delayed fluorescent (TADF) organic light-emitting diodes (OLEDs) yielded a maximum external quantum efficiency of 25.3 % and 16.5 %, respectively. Compared with the commercial material TPBi (EQE = 12.0 %, λ_EL = 668 nm) and mCP (EQE = 14.5 %, λ_EL = 652 nm), the TADF OLEDs based on QACN achieved a higher EQE and a large red-shift emission (EQE = 16.5 %, λ_EL = 694 nm). These findings underscore the potential of QACN as an effective host material for red phosphorescent and TADF emitters and provide a new auxiliary finesse for realizing deep red and near-infrared (NIR) OLEDs.

Abstract Image

查看原文本刊更多论文

用于红色磷光和热激活延迟荧光 OLED 的受体-σ-供体-σ-受体主材料

一种新型双极宿主分子二螺[芴-9,5′-喹啉并[3,2,1-de]吖啶-9′,9″-芴]-2,2″,7,7″-四碳腈（QACN）被开发出来，它具有受体-σ-供体-σ-受体结构。对其光物理性质、电化学性质和热性质的系统研究揭示了其卓越的热稳定性、三维空间构型和双极载流子传输能力。在红色磷光和热激活延迟荧光（TADF）有机发光二极管（OLED）中使用 QACN 作为宿主材料，其最大外部量子效率分别达到 25.3% 和 16.5%。与商用材料 TPBi（EQE = 12.0 %，λEL = 668 nm）和 mCP（EQE = 14.5 %，λEL = 652 nm）相比，基于 QACN 的 TADF 有机发光二极管实现了更高的 EQE 和更大的红移发射（EQE = 16.5 %，λEL = 694 nm）。这些发现强调了 QACN 作为红色磷光体和 TADF 发射器的有效宿主材料的潜力，并为实现深红色和近红外 (NIR) 有机发光二极管提供了一种新的辅助材料。

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分钟内获得全文求助全文

来源期刊

Organic Electronics 工程技术-材料科学：综合

CiteScore

6.60

自引率

6.20%

发文量

238

审稿时长

44 days

期刊介绍： Organic Electronics is a journal whose primary interdisciplinary focus is on materials and phenomena related to organic devices such as light emitting diodes, thin film transistors, photovoltaic cells, sensors, memories, etc. Papers suitable for publication in this journal cover such topics as photoconductive and electronic properties of organic materials, thin film structures and characterization in the context of organic devices, charge and exciton transport, organic electronic and optoelectronic devices.