A multifunctional emitter with synergistical adjustment of rigidity and flexibility for high-performance data-recording and organic light-emitting devices with "hot exciton" channel

被引：11

作者：

Chen, Guowei ^{[1
]}

Chen, Wen-Cheng ^{[1
]}

Su, Yaozu ^{[1
]}

Wang, Ruicheng ^{[1
]}

Jin, Jia-Ming ^{[1
]}

Liang, Hui ^{[1
]}

Tan, Bingxue ^{[1
]}

Hu, Dehua ^{[1
]}

Ji, Shaomin ^{[1
]}

Zhang, Hao-Li ^{[1
,2
]}

Huo, Yanping ^{[1
]}

Ma, Yuguang ^{[3
]}

机构：

[1] Guangdong Univ Technol, Sch Chem Engn & Light Ind, Guangzhou 510006, Peoples R China

[2] Lanzhou Univ, State Key Lab Appl Organ Chem SKLAOC, Key Lab Special Funct Mat & Struct Design MOE, Coll Chem & Chem Engn, Lanzhou 730000, Peoples R China

[3] South China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2024年 / 479卷

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

Rigidity and flexibility; Intramolecular dual lock; Hot exciton; Mechanochromic luminescence; Organic light -emitting diode; BLUE ELECTROLUMINESCENCE; ELECTRON-TRANSFER; FLUORESCENCE; EFFICIENT; STATE; EMISSION;

D O I：

10.1016/j.cej.2023.147616

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

An intramolecular dual-locking design is proposed for organic luminescent materials, aiming at synergistically adjusting the molecular rigidity and flexibility for applications in data storage and light-emitting devices. According to this concept, a multifunctional donor-acceptor type emitter, LPCz-TRZ, is developed, featuring a "soft" diphenylmethane lock and a "hard" single-bond lock in its donor moiety. The highly locked structure results in appreciable rigidity that endows LPCz-TRZ with high luminescence efficiency, narrow emission, promoted charge conductivity and triplet harvesting "hot exciton" channels, allowing high-performance deep-blue organic light-emitting diodes (OLEDs) with an external quantum efficiency as high as 7.88%, which is among the best deep-blue "hot exciton" OLEDs. Notably, the structure of LPCz-TRZ is semi-flexible, leading to unique mechanochromic luminescence (MCL) behavior. Compared to the conventional MCL emitters, the orchestration of rigidity and flexibility in LPCz-TRZ affords high-contrast, fatigue-resistance MCL, as evidenced by a simple, rewritable data-recording demonstration with negligible fatigue after up to 15 wiring-erasing cycles.

引用

页数：9

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