合成了一种铱配合物［(DFPPM)2 Ir(acac)］( DFPPM=2-(2, 4-二氟苯基) 嘧啶, acac=乙酰丙酮),利用 X 射线单晶衍射仪测定了该化合物的晶体结构。利用紫外-可见吸收光谱、发射光谱对其光物理性质进行研究。结果表明:(DFPPM)2 Ir(acac)的单晶结构属于三斜晶系, P-1空间群, 晶胞参数a=14.444 4(7) nm, b=18.047 9(10) nm,c=19.220 0(9) nm,α=113.115(5)°,β=90.453(4)°,γ=90.989(4)°,V=4 607.0(4) nm3。(DFPPM)2 Ir(acac) 在二氯甲烷溶液中的发射峰为 496 nm。以(DFPPM)2 Ir(acac)为客体材料, 制备了结构为ITO/NPB(40 nm)/CBP∶(DFPPM)2Ir (acac) (质量分数10%, 30 nm)/TPBi (15 nm) /Alq3 (50 nm)/Mg∶Ag(150 nm, 10∶1)/Ag(10 nm)的器件, 器件的发射峰位于494 nm, 最大亮度达到21 400 cd/m2, 最大电流效率为12.0 cd/A, 最大功率效率为 5.4 lm/W。

An iridium(Ⅲ) complex of (DFPPM)2Ir(acac) ［DFPPM=2-(2,4-difluorophenyl)-pyrimidine, acac= acetylacetone］ was prepared, and characterized by X-ray single crystal diffraction. The photophysical properties of (DFPPM)2 Ir(acac) were investigated by UV-Vis spectroscopy and photoluminescence (PL) technique. X-ray diffraction studies have revealed that the complex belongs to triclinic system with space group of P-1 and cell dimensions a=14.444 4(7) nm, b=18.047 9(10) nm, c=19.220 0(9) nm, α=113.115(5)°, β=90.453(4)°, γ= 90.989(4)°, V=4 607.0(4) nm3. The complex of (DFPPM)2Ir(acac) emits blue light with a maximum peak at 496 nm in dichloromethane at room temperature. Moreover, (DFPPM)2Ir(acac) was utilized as phosphorescence dopant in OLEDs with the structures of ITO/NPB(40 nm)/CBP∶(DFPPM)2Ir-(acac) (10%, 30 nm)/TPBi (15 nm)/Alq3 (50 nm)/Mg∶Ag(150 nm, 10∶1)/Ag(10 nm). The device showed blue emission at 494 nm, maximum brightness of 21 400 cd/m2, current efficiency of 12.0 cd/A, and power efficiency of 5.4 lm/W．