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以2-苯基吡啶(ppy)为主配体,2-(2-吡啶)苯并咪唑(pybiH)为辅助配体合成了一种室温蓝绿色磷光发射材料二(2-苯基吡啶)(2-(2-吡啶)苯并咪唑)合铱(III)((ppy)2Ir(pybi)),通过傅里叶变换红外(FTIR)光谱、核磁共振氢谱(1HNMR)、质谱(MS)、元素分析对其结构进行了表征.利用紫外-可见吸收光谱、荧光激发和发射光谱、循环伏安曲线,结合含时密度泛函理论(TD-DFT)模拟计算研究了(ppy)2Ir(pybi)的光物理特性及能级结构,并研究了其电致发光性能.(ppy)2Ir(pybi)的紫外吸收峰分别位于250,295,346和442nm,与理论模拟计算吻合得很好;(ppy)2Ir(pybi)为蓝绿光发射,发光峰分别位于495和518nm;(ppy)2Ir(pybi)的最高占据轨道(HOMO)和最低空轨道(LUMO)能级分别为-6.11和-3.43eV,光学带隙为2.68eV;以(ppy)2Ir(pybi)为掺杂剂,4,4-N,N-二咔唑基联苯(CBP)为主体材料,制备电致磷光器件,电致发射峰位于508nm,最大亮度为8451cd·m-2,最大电流效率为17.6cd·A-1.这些研究为(ppy)2Ir(pybi)在有机电致发光领域的应用提供实验依据.
A kind of room-temperature cyan-phosphorescent phosphorescent material, such as bis (2-phenylpyridine) (2-phenylpyridine) ((Ppy) 2Ir (pybi)) was synthesized and characterized by Fourier transform infrared spectroscopy (FTIR), 1HNMR, MS, The structure of (ppy) 2Ir (pybi) was characterized by means of elemental analysis and its structure was characterized by UV-Vis absorption spectroscopy, fluorescence excitation and emission spectroscopy, cyclic voltammetry and time-dependent density functional theory (TD- (Ppy) 2Ir (pybi) were located at 250, 295, 346 and 442 nm, respectively, which was in good agreement with the theoretical simulation. (Ppy) 2Ir ) Were blue-green emission with luminescence peaks at 495 and 518 nm respectively. The highest occupied orbital (HOMO) and lowest-lying orbital (LUMO) levels of (ppy) 2Ir (pybi) were -6.11 and -3.43eV, respectively. Was 2.68eV. Electrophosphorescent devices were prepared by using (ppy) 2Ir (pybi) as dopant and 4,4-N, N-dicarbazolylbiphenyl (CBP) as the host material. , The maximum brightness of 8451cd · m-2, the maximum power Efficiency 17.6cd · A-1. These studies (ppy) 2Ir (pybi) providing experimental evidence in the application field of organic electroluminescence.