Two new red-emitting ternary europium(iii) complexes with high photoluminescence quantum yields and exceptional performance in OLED devices†

被引：0
|
作者：
Ilmi, Rashid [1 ]
Li, Xiaofang [2 ]
Al Rasbi, Nawal K. [1 ]
Zhou, Liang [2 ]
Wong, Wai-Yeung [3 ]
Raithby, Paul R. [4 ]
Khan, Muhammad S. [1 ]
机构：
[1] Sultan Qaboos Univ, Dept Chem, POB 36, Al Khoud 123, Oman
[2] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resource Utilizat, Renmin St 5625, Changchun 130022, Peoples R China
[3] Hong Kong Polytech Univ, Dept Appl Biol & Chem Technol, Hung Hom, Kowloon, Hong Kong, Peoples R China
[4] Univ Bath, Dept Chem, Bath BA2 7AY, England
来源：
DALTON TRANSACTIONS | 2023年 / 52卷 / 36期
基金：
英国工程与自然科学研究理事会;
关键词：
LUMINESCENCE; LIGAND;
D O I：
暂无
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Two new organo-europium complexes (OEuCs) [Eu(btfa)(3)(Bathphen)] (OEuC-1) and [Eu(tta)(3)(Bathphen)] (OEuC-2) where btfa and tta are the anions of 4,4,4-trifluoro-1-phenyl-1,3-butanedione and 2-thenoyltrifluoroacetone while Bathphen = Bathophenanthroline have been synthesized and characterized. Both complexes in the solid state exhibit strong red emissions with photoluminescence quantum yields (PLQYs) of 80% +/- 10%. These complexes were tested as dopants in the emitting layer (EML) to fabricate red organic light emitting diodes (R-OLEDs). Through device engineering involving the amalgamation of appropriate host materials and complexes, we have achieved exceptional overall R-OLED performance for an OEuC-2 based device, with maximum current efficiency (CEmax) = 9.91 cd A(-1), maximum power efficiency (PEmax) = 9.15 lm W-1, maximum external quantum efficiency (EQEmax.) = 6.24%, brightness (B) of 545 cd m(-2), and (CIE) (x,y) = 0.620, 0.323 at J = 10 mA cm(-2)
引用
收藏
页码：12885 / 12891
页数：7
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