Synthesis, photoluminescence and electroluminescence of triphenylphosphine functionalized cyclometalated iridium(III) complexes

被引：8
作者：
Tan, Guiping [1 ,2 ,3 ]
Wang, Liqi [4 ,5 ]
Wang, Shoushan [1 ]
Liu, Peng [1 ]
Fan, Hongbo [1 ]
Ho, Cheuk-Lam [6 ]
Ma, Dongge [7 ]
Wong, Wai-Yeung [4 ,5 ,6 ]
机构：
[1] Dongguan Univ Technol, Sch Environm & Civil Engn, Guangdong Engn & Technol Res Ctr Adv Nanomat, Dongguan 523808, Peoples R China
[2] Shantou Univ, Dept Chem, Shantou 515063, Guangdong, Peoples R China
[3] Shantou Univ, Key Lab Preparat & Applicat Ordered Struct Mat Gu, Shantou 515063, Guangdong, Peoples R China
[4] Hong Kong Baptist Univ, Inst Mol Funct Mat, Waterloo Rd, Kowloon Tong, Hong Kong, Peoples R China
[5] Hong Kong Baptist Univ, Dept Chem, Waterloo Rd, Kowloon Tong, Hong Kong, Peoples R China
[6] Hong Kong Polytech Univ, Dept Appl Biol & Chem Technol, Hong Kong, Hong Kong, Peoples R China
[7] South China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China
来源：
DYES AND PIGMENTS | 2019年 / 160卷
基金：
中国国家自然科学基金;
关键词：
Iridium(III) complexes; Phosphorescence; Triphenylphosphine; Organic light-emitting diodes; Crystal structure; MOLECULAR-ORBITAL METHODS; LIGHT-EMITTING-DIODES; GAUSSIAN-TYPE BASIS; EXCITATION-ENERGIES; 3RD-ROW ATOMS; BASIS-SETS; ELECTROCHEMISTRY; APPROXIMATION; EFFICIENCY; IR(III);
D O I：
10.1016/j.dyepig.2018.08.054
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Three greenish-blue iridium (III) phosphorescent complexes with the molecular structure of [Ir(PPPY)(2)(PPh3)L] (Hpppy = 2-(4-phenoxyphenyl)pyridine; L = Cl-, NCS-, NCO-) were synthesized and characterized. Their photoluminescence spectra are significantly blue-shifted after introducing the strong-field ancillary ligand triphenylphosphine. These compounds exhibit emission peaks in the range of 474-479 nm in solutions at 298 K with quantum yields up to 0.33. The organic light-emitting diodes (OLEDs) were fabricated by thermal evaporation with complex 3. The best OLED D3 was obtained with turn-on voltage of 4.3 V, maximum luminance of 11931 cd m(-2) under 15.7 V, highest luminance efficiency (eta(L)) as 16.6 cd A(-1), power efficiency (eta(P)) as 12.2 Im W-1 and external quantum efficiency (EQE) as 5.6%.
引用
收藏
页码：717 / 725
页数：9
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