含氟绿光铱配合物的设计、合成及其高效磷光电致发光器件(英文)

A Fluorine-Containing Phosphorescent Iridium(Ⅲ) Complex for High-Efficiency Green Organic Light-Emitting Device

以2-(3-(2′,4′-二氟苯基)苯基)吡啶(Hdfbppy)为环金属C^N配体,乙酰丙酮(Hacac)为辅助配体,设计合成了一种绿色磷光铱配合物(Ir(dfbppy)2(acac));研究了此配合物的光物理性质及其电致发光器件性能。室温下,配合物Ir(dfbppy)2(acac)的二氯甲烷溶液的最大发射波长为520 nm,量子效率为71%,寿命为381 ns。将此配合物掺杂在4,4′-N,N′-二咔唑基二联苯(CBP)中,作为发光层制备了有机发光二极管器件。结果显示,该器件在7.2 V电压下呈现的最大亮度为68 324 cd·m-2,最大电流效率约为53cd·A-1,最大功率效率为37 lm·W-1,色坐标为(0.33,0.62)。

A green-light emitting iridium（Ⅲ） complex Ir（dfbppy）2（acac） with 2-（3-（2′,4′-difluorophenyl）phenyl）pyridine（Hdfbppy） as C^N ligands and 2,4-pentanedione（Hacac） as an ancillary ligand was designed and synthesized for phosphorescent organic light emitting diodes, and its photophysical and electroluminescent properties were investigated. The title complex exhibits a peak emission at 520 nm, a high PL quantum yield of71%, and a relatively short phosphorescence emission lifetime of 381 ns in CH2Cl2 at room temperature. An organic light-emitting diode using this complex with 4,4′-N,N′-dicarbazolylbiphenyl（CBP） as the host shows a green color with CIE coordinates of（0.33, 0.62）, accompanied by a rather excellent performance with a maximum luminance of 68 324 cd·m^-2 at 7.2 V, the luminous and power efficiencies are 53 cd·A^-1 and 37 lm·W^-1,respectively.