Electroluminecent devices made of vacuum-deposition polymerzation

本计画的最终目标是建立以真空升华聚合技术制作电激发光元件的方法。因此，研究适合于真空-气相聚合的单体和聚合物的设计，开发通过真空-气相聚合制备可固化聚合物膜的实验技术，研究通过真空-气相聚合方法制备的聚合物的电子和光学性质，1994 ~ 1995年期间的主要研究成果如下：1.根据我们对电致发光材料染料和发色团设计的认识，我们设计了一种在骨架中同时含有电荷传输和发射生色团的新型聚合物，并进行了合成。将由此合成的聚合物制成的EL器件旋涂成可用于EL器件的薄膜。比较了湿法制备的聚合物电致发光器件的电致发光性能， ...更多信息 真空升华染料膜制成的传统EL器件。聚合物薄膜的电致发光性能与染料薄膜的电致发光性能无明显差异，证实了我们所设计的电致发光聚合物分子的有效性。2.真空升华聚合时，必须采用两种单体在基底上的缩聚反应，并对连接发色团的连接基团进行考察。对酰胺基、酯基、酰亚胺基和氨基甲酸酯基等连接基团进行了测试，并发现氨基甲酸酯连接基团是测试基团中最好的。3.发展了真空-气相聚合技术，并将其应用于电致发光器件用聚合物薄膜的制备。结果发现，器件的性能高度依赖于少量的残留单体，和不同的发色团和连接基团之间的EL性能的详细比较是困难的。因此，进一步改进气相升华聚合的实验技术是必要的。少

The final target of the project is to establish the method to fabricate electroluminescent (EL) devices using vacuum-sublimation polymerization technique. Thus the studies on the design of monomers and polymer suitable for vacuum-vapor polymerization, development of experimental technique to fabricate ultrathin polymer films via vacuum-vapor polymerization, investigation of electronic and optical properties polymers prepared via vacuum-vapor polymerization processes, were performed.The summary of the research results during FY of 1994 and 1995 are as follows.1.Based on our knowledge on the design of dyes and chromophores of EL materials, we designed new polymers which cpntain both charge transporting and emissive chromophores in their skeletons and syntheses of designed polymers were porformed. The EL devices made of the polymers thus synthesized were spin-coated into thin films useful for EL devices. EL performances of the polymer EL devices prepared via wet processes were compared wi … More th conventional EL devices made of vacuum-sublimed dye films. No distinct difference was found between the EL performances of polymer films and of dye films, and validity of our molecular design of polymers for EL devices were comfirmed.2.In the case of vacuum-sublimation polymerization, polycondensation reactions of two monomers on substrate must be used, and the examination of connecting groups which link chromophores is important. Linkage groups such as amide groups, ester groups, imide groups and urethane groups were tested and an urethane linkage was found to be the best among the groups tested.3.The vacuum-vapor polymerization technique was developed and applied for the preparation of thin polymer films for EL devices. It was found that the device performances were highly dependent on small amount of residual monomers, and detailed comparison of EL performances among different chromophores and connecting groups were difficult. Thus further impalements in experimental techniques of vapor-sublimation polymerization is found to be necessary. Less