Os(II) Based Green to Red Phosphors: A Great Prospect for Solution-Processed, Highly Efficient Organic Light-Emitting Diodes

被引：120

作者：

Du, Bo-Sian ^{[1
]}

Liao, Jia-Ling ^{[1
]}

Huang, Ming-Hong ^{[2
]}

Lin, Cheng-Huei ^{[1
]}

Lin, Hao-Wu ^{[2
]}

Chi, Yun ^{[1
]}

Pan, Hsiao-An ^{[3
]}

Fan, Gang-Lun ^{[3
]}

Wong, Ken-Tsung ^{[3
]}

Lee, Gene-Hsiang ^{[3
]}

Chou, Pi-Tai ^{[3
]}

机构：

[1] Natl Tsing Hua Univ, Dept Chem, Hsinchu 30013, Taiwan

[2] Natl Tsing Hua Univ, Dept Mat Sci & Engn, Hsinchu 30013, Taiwan

[3] Natl Taiwan Univ, Dept Chem, Taipei 10617, Taiwan

来源：

ADVANCED FUNCTIONAL MATERIALS | 2012年 / 22卷 / 16期

关键词：

Organic light-emitting diodes; osmium; phosphine; benzothiazole; CYCLOMETALATED IR(III) COMPLEXES; INDUCED BLUE PHOSPHORESCENCE; EXTERNAL QUANTUM EFFICIENCY; IRIDIUM COMPLEXES; OSMIUM(II) COMPLEXES; ELECTROPHOSPHORESCENT DEVICES; TRIDENTATE LIGANDS; OLED FABRICATION; PT(II) COMPLEXES; RATIONAL DESIGN;

D O I：

10.1002/adfm.201200718

中图分类号：

O6 [化学];

学科分类号：

070301 [无机化学];

摘要：

Preparation and characterization of a new class of emissive Os(II) complexes (15) have been achieved using 3-(thiazol-2-yl), 3-(benzothiazol-2-yl), 3-(imidazol-2-yl) and 3-(benzimidazol-2-yl) azole chelates, together with the incorporation of one diphosphine ancillary for satisfying the octahedral coordination arrangement. The resulting Os(II) complexes, except for 5, all show bright emission spanning visible region from green to saturated red, and their structural versus spectroscopic properties have been comprehended by absorption/emission together with computational approaches. Subsequently, a series of solution-processed OLEDs using 14 as the dopant were successfully fabricated, demonstrating excellent device performances with external quantum efficiency (EQE) of 15%, current efficiency exceeding 48 cd/A, and power conversion efficiency up to 50 lm/W. Complex 4 is the only Os(II) based phosphor so far suitable for the fabrication of highly efficient green-emitting OLEDs.

引用

页码：3491 / 3499

页数：9

共 67 条

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