【摘要】 用热蒸发技术成功地制备了新合成的二氯取代的八羟基喹啉锌(ZnqCl2)薄膜,并制作成有机发光器件。紫外吸收谱分析表明,器件在225,290,350,392 5nm处有4个吸收峰。光致发光和电致发光研究表明,ZnqCl2薄膜有良好的发光特性,器件的发光亮度大。并分析了ZnqCl2薄膜的能级结构。更多还原

【Abstract】 Organic/polymeric electroluminescence (EL) has attracted much attention because of their potential applications in largearea fullcolor flatpanel displays. Since the first high performance bilayer organic lightemitting device (OLED) was reported by C. W. Tang in 1987, much progress has been made rapidly in this field. Various novel materials have been synthesized, and many significant devices have been fabricated, and application of OLEDs has been realized in commercial automotive audio system and cellular telephone. However, the efficiency and lifetime of the devices still have to be improved. Developing new type organic lightemitting materials will play an important role on overcoming the current problem. Whereas the choice of materials is very important because it decides directly the OLEDs’ performance. So study on new organic materials is the key to improve lightemitting coefficient and long lifetime. OLEDs were made up of polymer or small molecular compound. However, the polymers are usually spin coated, so it is difficult to avoid pint holes and impurities and their influence on the characteristic of lightemitting devices. The small molecule, Alq3 as a typical one, can be vacuum deposited and therefore the films with high purify, high fluorescent efficiency, high crystallizing temperature, stable performance can be achieved, which is important to the fabrication of OLEDs. Whereas it is expected to obtain a compound that has a resemble structure with Alq3, excellent stability and luminescence properties. In this paper, a new lightemitting material ZnqCl2 was synthesized; ZnqCl2 thin films were deposited by using thermal deposition technique. Lightemitting devices were prepared using ZnqCl2 as lightemitting layer. There has not been any report on this type of compound so far to our knowledge. The details of an experimental study on the deposition process of ZnqCl2 thin films and devices, and their photoelectric properties were given in this paper. It is demonstrated that such films can be deposited by convenient thermal evaporating technique, and a lightemitting devices is prepared successfully. The films were characterized by ultraviolet spectroscopy (UV), and photoluminescent spectroscopy. Optical absorption and fluorescent spectra of the films were measured. Significant fluorescence was detected and the spectrum was recorded in which two peaks at 4064, 540nm were observed respectively.更多还原