Organic electrofluorescent iridium complex material

A technology of phosphorescent materials and iridium complexes, which is applied in the field of iridium complex-based organic electrophosphorescent materials and their synthesis, can solve the problems of reduced lifetime and stability of light-emitting devices, concentration quenching, etc., and achieve reduced phosphorescent lifetime and reduced interaction role, reduce the effect of phase separation
CN100532385CInactive Publication Date: 2009-08-26SICHUAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SICHUAN UNIV
Publication Date
2009-08-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

The iridium complex organic electrophosphorescent material provided by the present invention introduces a group R with large steric hindrance on the ligand, and the structural formula is as follows: in the above structural formula, R is tert-butyl or isopropyl, and X is A sulfur atom or a nitrogen atom to which a phenyl substituent is attached. The combination of R and X has four forms: or X is an S atom, R is a tert-butyl group; or X is an S atom, and R is an isopropyl group; or X is an N atom with a phenyl substituent, and R is tert-butyl; or X is an N atom with a phenyl substituent, and R is an isopropyl group. The phosphorescence material can reduce the influence of phosphorescence quenching caused by phase separation on the luminous efficiency of the device, and the phosphorescence lifetime is reduced by about one time compared with the existing similar materials.
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Description

technical field

[0001] The invention belongs to the field of organic electrophosphorescent materials, in particular to an iridium complex organic electrophosphorescent material and a synthesis method thereof. Background technique

[0002] Organic electrophosphorescent materials have attracted extensive attention because they can effectively utilize triplet excitons and greatly improve luminous efficiency. In 1999, Professor Thompson of the University of Southern California and Professor Forrest of Princeton University introduced three (2-phenylpyridine) iridium (III) [abbreviated as Ir (ppy) 3 ] doped into 4,4'-N, N-dicarbazole biphenyl (abbreviated as BCP) to make a green photoluminescence phosphorescent device, and its highest external quantum efficiency reaches 8.0% [see Baldo M A, Lamansky S, BurrowsP E , Thompson M E, Forrest S R, Appl. Phys. Lett. 1999, 11, 3709]. Subsequently, Thompson et al. reported a series of cyclometallic ligands (C^N) and monoanionic bidentate...

Claims

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