Fluorene pendant-functionalization of poly(N-vinylcarbazole) as deep-blue fluorescent and host materials for polymer light-emitting diodes

被引：5

作者：

Sun, Nin ^{[1
,2
]}

Zou, Qin ^{[1
,2
,3
]}

Chen, Wenyu ^{[1
,2
]}

Zheng, Yingying ^{[1
,2
]}

Sun, Kai ^{[1
,2
]}

Li, Chunbin ^{[3
]}

Han, Yamin ^{[1
,2
]}

Bai, Lubing ^{[1
,2
]}

Wei, Chuanxin ^{[4
,5
]}

Lin, Jinyi ^{[1
,2
]}

Yin, Chengrong ^{[1
,2
]}

Wang, Jianguo ^{[3
]}

Huang, Wei ^{[1
,2
,4
,5
,6
]}

机构：

[1] Nanjing Tech Univ NanjingTech, Key Lab Flexible Elect KLOFE, Nanjing 211816, Peoples R China

[2] Nanjing Tech Univ NanjingTech, Inst Adv Mat IAM, Nanjing 211816, Peoples R China

[3] Inner Mongolia Univ, Coll Chem & Chem Engn, Inner Mongolia Key Lab Fine Organ Synth, Hohhot 010021, Peoples R China

[4] Nanjing Univ Posts &Telecommun, Ctr Mol Syst & Organ Devices CMSOD, Key Lab Organ Elect & Informat Displays, Nanjing 210023, Peoples R China

[5] Nanjing Univ Posts & Telecommun, Inst Adv Mat IAM, Nanjing 210023, Peoples R China

[6] Northwestern Polytech Univ, Shaanxi Inst Flexible Elect SIFE, Xian 710072, Peoples R China

来源：

CHINESE CHEMICAL LETTERS | 2023年 / 34卷 / 08期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

Fluorene; Deep-blue emission; Energy transfer; Polymer light-emitting diodes; SUPRAMOLECULAR SIDE-CHAIN; EMISSION; ELECTROLUMINESCENCE; COPOLYMERS; RED;

D O I：

10.1016/j.cclet.2022.108078

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

& pi;-Electron coupling of pendant conjugated segment in & pi;-stacked semiconducting polymers always causes the formation of defect trapped sites and further quenched high-band excitons, which is harmful to the performance and stability of deep-blue polymer light-emitting diodes (PLEDs). Herein, considerate of "defect" carbazole (Cz) electromers in poly(N-vinylcarbazole) (PVK), a series of fluorene units are introduced into pendant segments (PVCz-DMeF, PVCz-FMeNPh and PVCz-DFMeNPh) to suppress the strong & pi;-electron coupling of pendant Cz units and enhance radiative transition toward fabricating sable PLEDs. Compared to PVCz-FMeNPh and PVCz-DFMeNPh, PVCz-DMeF spin-coated films show a relatively efficient deep-blue emission, completely similar to its single pendant chromophore, confirmed an extremely weak charge-transfer and electron coupling between adjacent pendant segments. Therefore, PLEDs based on PVCz-DMeF present stable and deep-blue emission with a high color purity (0.17, 0.08), associated with extremely weak defect emission at 60 0 & SIM;70 0 nm (induced by carbazole electromers). Finally, PLEDs based on PVCz-DMeF/F8BT blended films (1:1) also present the high maximum luminance ( L max ) of 6261 cd/m 2 and current efficiency ( CE max ) of 2.03 cd/A, confirmed slightly trapped sites formation. Therefore, precisely control the arrangement and packing model of pendant units in & pi;-stacked polymer is an essential prerequisite for building efficient and stable emitter for optoelectronic devices.& COPY; 2023 Published by Elsevier B.V. on behalf of Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences.

引用

页数：6

共 41 条

[41] Incorporation of hydrogen-bonding units into polymeric semiconductors toward boosting charge mobility, intrinsic stretchability, and self-healing ability [J].

Yu, Xiaobo ;

Li, Cheng ;

Gao, Chenying ;

Zhang, Xisha ;

Zhang, Guanxin ;

Zhang, Deqing .

SMARTMAT, 2021, 2 (03) :347-366

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