Affiliation:
1. Shenzhen Key Laboratory of New Information Display and Storage Materials College of Materials Science and Engineering Shenzhen University Shenzhen 518055 P. R. China
2. Shenzhen Institute of Information Technology Shenzhen 518172 P. R. China
Abstract
AbstractDesigning mononuclear platinum(II) complexes that do not rely on intermolecular aggregation for high‐performance red organic light‐emitting diodes remains a formidable challenge. In this work, three robust red‐emitting Pt(II) complexes are created by utilizing a rigid 4‐coordination configuration, where the ligands are formed by linking electron‐donor of triphenylamine (TPA) moieties with electron‐acceptor of pyridine, isoquinoline, and/or δ‐carboline units. The thermal stability, electrochemical, and photophysical properties of the complexes are thoroughly examined. The complexes display efficient red phosphorescence, with high photoluminescence quantum yields and short excited lifetimes. The OLEDs dope with these complexes exhibit high maximum external quantum efficiencies (EQEs) of up to 31.8% with minimal efficiency roll‐off even at high brightness. Significantly, the devices demonstrate exceptional long operational lifetime, with a T90 lifetime of over 14000 h at initial luminance of 1000 cd m−2, indicating the potential for these complexes to be practically utilizes.
Funder
National Natural Science Foundation of China
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Cited by
6 articles.
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