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合成了一种新型有机小分子发光材料10-羟基-苯并喹啉(Bq),利用电化学循环伏安方法测量了此材料的能带宽度为1.98 eV左右,此材料的光致发光峰位于616 nm,这个数值与材料能带宽度相吻合。利用高斯03软件计算了此材料分子的最高分子占据轨道和最低空轨道上的电子分布情况。将此材料与聚乙烯咔唑(PVK)按3%的质量比配成混合溶液,制备出了ITO/PVK:Bq/BCP/Alq3/Al和ITO/PVK:Bq/Al结构的电致发光器件,测量了这两种器件电致发光谱,除了位于616 nm的Bq的发光峰,同时在500 nm处还存在一个发光峰。经分析认为500 nm的发光峰源自PVK和Bq分子间的电致激基复合物发光。多层结构的器件在不同电压下都呈现白色的发光,经计算发光的色坐标为(x=0.37,y=0.38)。
A novel organic small molecule luminescent material 10-hydroxy-benzoquinoline (Bq) was synthesized. The energy band width of this material was about 1.98 eV measured by electrochemical cyclic voltammetry. The photoluminescence peak of this material is located at 616 nm, which is consistent with the band width of the material. The Gaussian 03 software was used to calculate the electronic distribution of the highest molecular occupied orbital and the lowest empty orbital of the material molecule. An ITO / PVK: Bq / BCP / Alq3 / Al and ITO / PVK: Bq / Al structure electroluminescent device was prepared by mixing this material with polyvinylcarbazole (PVK) in a mass ratio of 3% , The electroluminescence spectra of these two devices were measured except for the luminescence peak of Bq at 616 nm and a luminescence peak at 500 nm at the same time. It is considered that the luminescence peak at 500 nm originates from the electroluminescent complex between PVK and Bq molecules. The devices with multi-layer structures showed white luminescence under different voltages, and the color coordinates of luminescence were calculated as (x = 0.37, y = 0.38).