Dinuclear cyclometalated platinum(II) complexes containing a deep blue fluorescence chromophore: synthesis, photophysics and application in single dopant white PLEDs

被引：6

作者：

Zhang, Youming ^{[1
]}

Jiang, Haigang ^{[1
]}

Liu, Yu ^{[1
]}

Zhou, Kaifeng ^{[2
]}

Wang, Yafei ^{[1
]}

Tan, Hua ^{[1
]}

Su, Shijian ^{[2
]}

Zhu, Weiguo ^{[1
]}

机构：

[1] Xiangtan Univ, Minist Educ, Key Lab Environm Friendly Chem & Applicat, Coll Chem, Xiangtan 411105, Peoples R China

[2] South China Univ Technol, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China

来源：

DALTON TRANSACTIONS | 2016年 / 45卷 / 36期

基金：

中国国家自然科学基金; 湖南省自然科学基金;

关键词：

LIGHT-EMITTING-DIODES; EMISSIVE-LAYER; OPTOELECTRONIC PROPERTIES; ELECTROLUMINESCENT DEVICES; POLYMER; ORANGE; LIGANDS; OLEDS; HOST;

D O I：

10.1039/c6dt02472f

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

To control excimer/aggregation emission and achieve a single active emitter of aggregation for controllable white polymer light-emitting devices (PLEDs), two star-shaped dinuclear platinum(II) complexes of C(6)DBCzC(6)-DFPt(pic) and DPy(TPA)-C(6)DBCzC(6)-DFPt(pic) were synthesized and characterized, in which DBCz is a 3,6-diphenyl-carbazole bridged core, C-6 is an unconjugated dioxyhexyloxy linkage, DPy(TPA) is (4,4'-di(pyren-1-yl) triphenylamine), a deep blue-emitting fluorescent chromophore, and DPtF(pic) is a dinuclear platinum(II) [(4,6-difluorophenyl)-pyridinato-N, C-2](picolinate) blue-emitting phosphorescent chromophore. Compared to its parent complex C(6)DBCzC(6)-DFPt(pic), DPy(TPA)-C(6)DBCzC(6)-DFPt(pic) showed a lower lying highest occupied molecular energy level (HOMO) and lowest unoccupied molecular energy level (LUMO). Under a current of 2.5 mA, near-white emission was obtained in the DPy(TPA)-C(6)DBCzC(6)-DFPt(pic)-doped devices at dopant concentrations from 4 wt% to 10 wt%. However, green-yellow emission was obtained in the C(6)DBCzC(6)-DFPt(pic)-doped devices with the same device configuration using a blend of polyvinylcarbazole (PVK) and 2-(4-biphenyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole (PBD) as a host matrix, respectively. This indicates that incorporating a deep blue fluorescent chromophore into a green-yellow emitting dinuclear platinum(II) complex is an available way to control aggregation/excimer emissions and get white-emitting PLEDs with a single dopant.

引用

页码：14131 / 14140

页数：10