苯基酞嗪类三环铱配合物的合成及其电致发光性能

摘要

通过含苯氧基团的苯基酞嗪衍生物配体与IrC13一步反应生成了三环铱配合物Ir( mppppz)3.在480nm光激发下其二氯甲烷溶液的发光波长为608 nm,量子产率约为0.31,磷光寿命为268 ns,其纯固态发光波长为640 nm.配合物的HOMO能级为5.14 eV,LUMO能级为2.91 eV.当Ir (mppppz)3以2％的质量分数掺杂于PVK-PBD中做成电致发光器件后,电致发光波长为616 nm.器件的启亮电压为3.9V,最大外量子效率为1.48％,最大亮度为1 030 cd/m2,对应的流明效率为0.81 cd/A,所发出的光的色坐标是(0.64,0.35),接近标准红色.%A new tris-cyclometalated iridium(III) complex tris(l-(2, 6-dimethylphenoxy) -4-(4-phe-noxyphenyl)phthalazine) iridium( III) [Ir(mppppz)3] was synthesized by the direct reaction of a pheny-lphthalazine derivative with phenolic groups and IrCl3. Under the excitation of 480 nm,complex Ir(mppp-pz)3 emitted a strong phosphorescence centered at 608 nm in a CH2Cl2 solution and 640 nm in solid. Its lifetime is 268 ns and quantum yield is approximately 0.31 in a CH2Cl2 solution. The HOMO energy level is 5.14 Ev and LUMO is 2.91 Ev. The organic light-emitting device based on Ir(mppppz)3(2% ) exhibits red electrophosphorescence which peaks at 616 nm. The maximum external quantum efficiency is 1.48% , the luminance is 1 030 cd/m2 and the corresponding efficiency is 0.81 cd/A. The turn-on voltage is 3.9 V with the Commission Internationale de L'Eclairage (CIE) coordinates of (0.64, 0.35).