Three neutral Cu(I) complexes (Cu01, Cu02 and Cu03) with general formula NˆPCuI(PPh₃), where NˆP = 2-(2′-diphenylphosphinophenyl)-1-phenylbenzimidazole derivatives, are synthesized and characterized. The crystal structures of the complexes suggest that the central Cu(I) ion is tetra-coordinated by bidentate PˆN ligand, iodide and ancillary triphenylphosphine ligand, forming a distorted tetrahedron configuration. At 293 K, all complexes in powder exhibit intense emissions (Cu01 581 nm, Cu02 557 nm, Cu03 575 nm) with quantum yield up to 38% (Cu01), implying their potential application as emitters in organic light-emitting diode (OLED). In addition, the thermal stability of Cu01 is confirmed by the luminescence spectrum from evaporated amorphous films. Vapor-deposited OLED based on Cu01 is fabricated, showing a peak external quantum efficiency of 3.4%, a peak current efficiency of 10.0 cd/A, and a maximum brightness of 1806 cd m⁻².

三种具有通式NˆPCuI（PPh ₃）的中性Cu（I）配合物（Cu01，Cu02和Cu03）），其中N ＝ P ＝ 2-（2'-二苯基膦基苯基）-1-苯基苯并咪唑衍生物，并进行了表征。配合物的晶体结构表明，中心Cu（I）离子被双齿PˆN配体，碘化物和辅助三苯基膦配体四配位，形成扭曲的四面体构型。在293 K时，粉末中的所有配合物均表现出强烈的发射（Cu01 581 nm，Cu02 557 nm，Cu03 575 nm），量子产率高达38％（Cu01），这表明它们潜在地用作有机发光二极管（OLED）的发射体。另外，通过蒸发的非晶膜的发光光谱确认了Cu01的热稳定性。制备了基于Cu01的气相沉积OLED，其峰值外部量子效率为3.4％，峰值电流效率为10.0 cd / A，最大亮度为1806 cd m⁻²。