Phenanthro[9,10-d]imidazole based new host materials for efficient red phosphorescent OLEDs
作者:Daiva Tavgeniene、Gintare Krucaite、Urte Baranauskyte、Jian-Zhi Wu、Hong-Yu Su、Chih-Wei Huang、Chih-Hao Chang、Saulius Grigalevicius
DOI:10.1016/j.dyepig.2016.11.003
日期:2017.2
characterization of a new series of bipolar phenanthro[9,10-d]imidazole based compounds. The derivatives are highly thermally stable materials as demonstrated by thermogravimetric analysis. Electron photoemission spectra of thin layers of the materials show ionization potentials in the range of 5.1–5.4 eV. Spectroscopic properties of the phenanthro[9,10-d]imidazole based derivatives were determined by absorption
我们报告合成和表征的新系列的双极性菲[9,10- d ]咪唑基化合物。衍生物是高度热稳定的材料,如通过热重分析所证明的。材料薄层的电子光发射光谱显示出电离电势在5.1–5.4 eV的范围内。通过吸收和光致发光测定来确定基于菲咯啉[9,10- d ]咪唑的衍生物的光谱性质。所有开发的材料都用作红色磷光有机发光二极管的基质,并将其性能与市售基质材料进行了比较。结果表明,具有2- [4-(N,N-二苯氨基)苯基] -1-苯基菲[9,10- d咪唑显示出卓越的性能,峰值效率为15.9%(21.5 cd / A和29.9 lm / W),并且开启电压为2.8 V,非常低。该器件的效率比装有商用主机的器件高出35–67%。材料。