两种红光铱配合物的合成和电致发光性能研究  被引量:7

Synthesis and Electroluminescence of Two Red Iridium Complexes

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作  者:张松[1] 薛莉莎[1] 吴晨[1] 郑佑轩[1] 左景林[1] 

机构地区:[1]南京大学化学化工学院,配位化学国家重点实验室,南京微结构国家实验室(筹),江苏省南京市210093

出  处:《无机化学学报》2014年第1期134-141,共8页Chinese Journal of Inorganic Chemistry

基  金:国家自然科学基金(No.21371093)资助项目

摘  要:以二(二苯基磷酰)胺fHtpip)作为辅助配体,与主配体2-(2,4-二氟苯基)异喹啉和2-(4-三氟甲基苯基)异喹啉合成了红光铱磷光配合物Ir(dfpiq)2tpip和Ir(tfmpiq)2tpip并得到了晶体结构。在CH2Cl2中发射光谱主要是MLCT发射,峰位置分别为622和600nm.量子效率分别为15%和17%,而HOMO/LUMO能级分别是-4.80/-2.58和-4.73/-2.57eV。在1150-1300(V·cm-1)1/2电场范围.Ir(dfpiq)2tpip的电子迁移率为6.61-8.49×10^-6cm2·V-1·s-1,Ir(tfmpiq)2tpip的电子迁移率为6.08~6.61×10^-6cm2·V-1·s-1。ITO/TAPC(60nm)/Ir-complex(l5wt%):CBP(50nm)/TPBi(60nm)/LiF(1nm)/Al(100nm)中基于Ir(dfpiq)2tpip的器件最大安培效率和功率效率分别为4.71cd.A-1和1.82lm.W-1,12.0V时达到的最大亮度为18195cd·m-2。基于Ir(tfmpiq)2tpip的器件最大安培效率和功率效率分别为3.47cd.A-1和1.51lm·W-1,12.4V时达到的最大亮度为14676cd·m-2。By introducing tetraphenylimidodiphosphinate (Htpip) as the ancillary ligand, two iridium complexes Ir (tfmpiq)2tpip and Ir (dfpiq)2tpip (dfpiq =2-(2,4-difluorophenyl)quinoline, tfmpiq =2-(4-(trifluoromethyl)phenyl) quinoline) have been synthesized. For the emission spectra in CH2C12 solution, the maximum peaks locate at 622 and 600 nm for Ir(tfmpiq)2tpip and Ir(dfpiq)2tpip with the quantum efficiencies of 15% and 17%, respectively. The HOMO/LUMO levels are calculated as -4.80/-2.58 and -4.73/-2.57 eV, respectively. Under electric field from 1150 to 1300 (V .cm-1)1/2, the electron mobilities in 60 nm Ir(tfmpiq)2tpip and Ir(dfpiq)2tpip layers are 6.61-8.49×10^-6 cm2- V-1- s-1 and 6.08-6.61×10^-6 cm2.V-1- S-1, respectively. The devices with the structure of ITO/TAPC(60 nm)/Ir-complex (15wt%): CBP (50 nm)/TPBi(60 nm)/LiF(1 nm)/Al(100 nm) were fabricated. The device based on Ir(dfpiq)ztpip exhibited a luminance of 18 195 cd.m-2 at a driving voltage of 12.0 V with a maximum current efficiency (ηc) of 4.71 cd.A-1 and a maximum power efficiency (ηp) of 1.82 lm.W-1, respectively. While the device based on Ir(tfmpiq)2tpip exhibited a luminance of 14 676 cd.m-2 at a driving voltage of 12.0 V with a maximum ηc of 3.47 cd. A-1 and ηp of 1.51 lm.W-1, respectively.

关 键 词:红光铱配合物 2-(2 4-二氟苯基)异喹啉 2-(4-三氟甲基苯基)异喹啉 二(二苯基磷酰)胺 电子迁移率 有机电致发光 

分 类 号:TN383.1[电子电信—物理电子学]

 

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