Strongly yellow photo- and electroluminescent palladium(<sc>ii</sc>) complexes via metal-assisted thermally activated delayed fluorescence

被引：0

作者：

Zhang, Yi ^{[1
]}

Wan, Xintong ^{[1
]}

Zhang, Qizheng ^{[1
]}

Zhang, Jingling ^{[1
]}

Jiang, Li ^{[1
]}

Li, Nengquan ^{[1
]}

Miao, Jingsheng ^{[1
]}

Li, Kai ^{[1
]}

机构：

[1] Shenzhen Univ, Coll Mat Sci & Engn, Guangdong Prov Key Lab New Energy Mat Serv Safety, Shenzhen Key Lab New Informat Display & Storage Ma, R China, Shenzhen 518055, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY C | 2025年

基金：

中国国家自然科学基金;

关键词：

LIGHT-EMITTING-DIODES; CYCLOMETALATED PLATINUM(II) COMPLEXES; QUANTUM EFFICIENCY; RATIONAL DESIGN; EMITTERS; PHOSPHORESCENCE; PALLADIUM(II); LUMINESCENCE; EXCITONS; PD(II);

D O I：

10.1039/d4tc05027d

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Two luminescent palladium(ii) complexes, namely PdBO and DPdBO, featuring metal-perturbed intraligand charge transfer (MPICT) excited states have been designed and synthesized. Single-crystal X-ray structures of both complexes indicate the presence of intramolecular multiple noncovalent interactions including metal & ctdot;pi, pi & ctdot;pi and C-H & ctdot;pi interactions. Both complexes have good thermal stability with decomposition temperatures of 384 and 435 degrees C, presumably benefitting from the assistance of noncovalent interactions. Photophysical studies of both complexes reveal efficient yellow thermally activated delayed fluorescence (TADF) with photoluminescence quantum yields of 91% and 89%, respectively. Organic light-emitting diodes (OLEDs) based on PdBO show a maximum external quantum efficiency (EQE) of 19.5%. This work shows the facile design of TADF Pd(ii) complexes based on the MPICT strategy which features a non-coordinating electron-acceptor moiety.

引用

页数：8

共 3 条

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