"Steric Armor"Strategy of Blue Fluorescent Emitters against Photooxidation-Induced Degradation

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外文摘要：Stability against oxygen is an important factor affecting the performance of organic semiconductor devices.Improving photooxida-tion stability can prolong the service life of the device and maintain the mechanical and photoelectric properties of the device.Gen-erally,various encapsulation methods from molecular structure to macroscopic device level are used to improve photooxidation sta-bility.Here,we adopted a crystallization strategy to allow 14H-spiro[dibenzo[c,h]acridine-7,9'-fluorene](SFDBA)to pack tightly to re-sist fluorescence decay caused by oxidation.In this case,the inert group of SFDBA acts as a"steric armor",protecting the photosen-sitive group from being attacked by oxygen.Therefore,compared with the fluorescence quenching of SFDBA powder under 2 h of sunlight,SFDBA crystal can maintain its fluorescence emission for more than 8 h under the same conditions.Furthermore,the pho-toluminescence quantum yields(PLQYs)of the crystalline film is 327％higher than that of the amorphous film.It shows that the crystallization strategy is an effective method to resist oxidation.

外文关键词：

Organic semiconductorPhotooxidationSpirocyclic aromatic hydrocarbonsCrystal engineeringFluorescence

作者：

Sha-Sha Wang、Jing-Rui Zhang、Kuan-De Wang、Hao-Ran Li、Peng-Hui Meng、Yang Zhou、Xiang Yu、Ying Wei、Quan-You Feng、Yu-He Kan、Ling-Hai Xie

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作者单位：

Centre for Molecular Systems and Organic Devices(CMSOD),State Key Laboratory of Organic Electronics and Information Displays &Institute of Advanced Materials,Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM),Nanjing University of Posts & Telecommunications,Nanjing,Jiangsu 210023,China

Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials,School of Chemistry and Chemical Engineering,Huaiyin Normal University,Huai'an,Jiangsu 223300,China

基金：

Natural Science Foundation of Nanjing University of Posts and TelecommunicationsNatural Science Foundation of Nanjing University of Posts and TelecommunicationsState Key Laboratory of Organic Electronics and Information DisplayKey Laboratory of Lowdimensional Materials Chemistry of Jiangsu ProvinceGeneral Program of China Postdoctoral Science FoundationGeneral Program of Basic Science(Natural Science)of Colleges and Universities of Jiangsu ProvinceNational Overseas Study FundNational Key LaboratoryNational Natural Science Foundation of China

项目编号：

NY222157NY221085GZR2022010008JSKC200222022M71168422KJB4300362020083200512009DS69009562288102

出版年：

2024

DOI：

10.1002/cjoc.202300638

中国化学(英文版)

中国化学会上海有机化学研究所

中国化学(英文版)

CSTPCD

影响因子：0.848

ISSN：1001-604X

年,卷(期)：2024.42(11)