期刊
ADVANCED FUNCTIONAL MATERIALS
卷 24, 期 13, 页码 1911-1927出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201302871
关键词
blue phosphorescence; blue and white OLEDs; platinum; boron
类别
资金
- Natural Sciences and Engineering Research Council of Canada
- Canada Council for the Arts for the Killam Research Fellowship
New blue and blue-green phosphorescent C<^>N chelate Pt(II) compounds that contain a dimesitylboryl-functionalized phenyl-1,2,3-triazole ligand (Bptrz) are synthesized. The influence of three different ancillary ligands, namely acetylacetonato (acac), picolinate (pic) and pyridyl-1,2,4-triazolyl (pytrz), on phosphorescence quantum efficiency and excimer emission is examined. Pt(II) compounds with a p-Bptrz ligand consistently emit a blue-green color with an emission wavelength= 490-500 nm while those with a m-Bptrz ligand emit a blue color with (em) = 450-460 nm and a quantum efficiency as high as 0.97. In addition to the blue monomer emission peak, Pt(m-Bptrz)(pytrz) compounds display an excimer emission peak at approximate to 550 nm in a solid matrix whose intensity is dependent on the substituent group on pytrz and the doping concentration. As a result of the monomer and excimer emission, bright white phosphorescence is observed for several members of Pt(m-Bptrz)(pytrz) compounds. Intramolecular CHN hydrogen bonds are found to play an important role in the high stability and high phosphorescent quantum efficiency of Pt(m-Bptrz)(pytrz) compounds. Single-dopant blue and white electrophosphorescent devices using Pt(m-Bptrz)(CF3-pytrz-Me) or Pt(m-Bptrz)(t-Bu-pytrz-Me) as the emitter are successfully fabricated. White electroluminesencedevices with external quantum efficiency of 15.6% and CIE (xy) of 0.31, 0.44 are achieved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据