Highly Efficient and Robust Blue Phosphorescent Pt(II) Compounds with a Phenyl-1,2,3-triazolyl and a Pyridyl-1,2,4-triazolyl Chelate Core
作者:Xiang Wang、Shao-Long Gong、Datong Song、Zheng-Hong Lu、Suning Wang
DOI:10.1002/adfm.201402366
日期:2014.12
as diphenyl amino (NPh2) or trityl (CPh3), is found to greatly diminish the excimer emission. Using this approach, several highly efficient blue and green phosphorescent Pt(II) compounds with λem at ≈450–460 nm and Φp ≈ 0.70 to 1.00 are obtained. These molecules are highly robust with exceptionally high thermal stability. Bright bluish‐green electrophosphorescent devices with external quantum efficiencies
一类新的明亮磷光的Pt(II)的化合物的含有一个N ∧ C-螯合物苯基-1,2,3-三唑基配体(ptrz)和N ∧ C-螯合物吡啶基-1,2,4-三唑基配体( pytrz)。检查了各种取代基对这类分子的磷光的影响。晶体结构分析表明,这类化合物极有可能形成堆积的二聚体(其中一种甚至在气相中也能持久存在),从而导致受激准分子的发射。发现引入大的取代基,例如二苯基氨基(NPh 2)或三苯甲基(CPh 3),极大地减少了准分子的发射。使用这种方法,几种高效的蓝色和绿色磷光Pt(II)化合物具有λ EM在≈450-460nm和Φ p ≈0.70至1.00得到。这些分子非常坚固,具有极高的热稳定性。制造了外部量子效率高达16.7%的明亮的蓝绿色电致磷光器件。