Circularly polarised photoluminescence and electroluminescence of chiral copper(i) dimers based on R/S-2,2′-bis(diphenylphosphino)-1,1′-binaphthalene ligands

被引：11

作者：

Zhou, Yong-Hui ^{[1
]}

Zhang, Ai-Wei ^{[1
]}

Huang, Ru-Jun ^{[1
]}

Sun, Yu-Hang ^{[1
]}

Chen, Zhu-Jun ^{[1
]}

Zhu, Bai-Song ^{[1
]}

Zheng, You-Xuan ^{[2
]}

机构：

[1] Nanjing Univ Informat Sci & Technol, Coll Chem & Mat, Nanjing 210044, Peoples R China

[2] Nanjing Univ, Sch Chem & Chem Engn, State Key Lab Coordinat Chem, Nanjing 210023, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY C | 2023年 / 11卷 / 04期

关键词：

ACTIVATED DELAYED FLUORESCENCE; LUMINESCENCE; POLYMER;

D O I：

10.1039/d2tc04895g

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Due to the ability to emit circularly polarised luminescence (CPL) for application in many areas, chiral luminescent materials have undergone rapid development in recent years. Herein, three chiral copper(i) chloro-bridged dimers R/S-(BINAP)(2)Cu(mu-X-2) (X = Cl, Br and I) based on R/S-2,2 '-bis(diphenylphosphino)-1,1 '-binaphthalene (R/S-BINAP) ligands were synthesized conveniently at room temperature with high yields above 95%. Though emissions of the compounds in solution are weak, the dimers in the powder form and doped films displayed strong luminescence. Furthermore, the small singlet-triplet energy level gap and the calculated theoretical frontier molecular orbital distribution overlap suggested that these dimers have thermally activated delayed fluorescence characteristics. In addition, R/S-(BINAP)(2)Cu(mu-X-2) doped films showed mirror symmetric circular dichroism and CPL spectra with a high dissymmetry factor (g) above 1 x 10(-2). However, the corresponding circularly polarised organic light-emitting diodes (CP-OLEDs) fabricated by the evaporation method based on R/S-(BINAP)(2)Cu(mu-I-2) exhibited a high maximum external quantum efficiency of 21.7%. Notably, the CP-OLEDs also displayed mirror imaged circularly polarised electroluminescence spectra with |g(EL)| factors of around 3.0 x 10(-3).

引用

页码：1329 / 1335

页数：7

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