光学薄膜,光电子薄膜及光学有机薄膜

本文评介了新技术，新材料和新工艺在薄膜技术的应用及其最新发展。     

Synthesis and light‐emitting properties of new poly(p‐phenylenevinylene) derivatives containing oxadiazole moiety

Two new poly(p‐phenylenevinylene) (PPV) derivatives containing the oxadiazole moiety (OXA–PPV1 and OXA–PPV2) were synthesized by the Wittig condensation polymerization reaction and their thermal and light‐emitting properties were investigated. The single‐layer and triple‐layer electroluminescent (EL) devices with configurations of ITO/OXA–PPV1/Al and ITO/OXA–PPV1/OXD/Alq₃/Al were fabricated. They both exhibited blue emission at 460 nm. For comparison, the PPV derivative containing the oxadiazole moiety only in the side chains (OXA–PPV2) was also synthesized. Both single‐layer and triple‐layer EL devices with OXA–PPV2 as the emissive layer emitted green‐light at 560 nm. The turn‐on voltages of the triple‐layer device was 11 V for OXA–PPV1 and 8 V for OXA–PPV2. The triple‐layer EL devices showed much better performance than that of the single‐layer devices. The spectra indicated that energy or electron transfer occurred from the side‐chain oxadiazole to the main‐chain styrene unit. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 86: 2424–2428, 2002     

铜酞菁缓冲层改善有机电致发光器件性能的机理研究

利用铜酞菁薄膜充当缓冲层，研究了缓冲层对有机电致发光器件性能的影响，研究结果表明含有铜钛菁缓冲层的器件性能时显优于不含有缓冲层的器件，加入铜酞菁冲层后器件发光稳定性也得到了改善。本文对相关机理进行了探讨，分析认为，铜酞菁本身的热稳定性和它能够降低空 穴注入势垒的性质是提高器件性能的主要原因。     

有机层界面电荷聚集及其对OLED性能的影响

采用金属Al、合金Mg:Ag以及复合层LiF-Al作为阴极材料,利用真空加热蒸镀法制备了异质结有机发光器件(OLED),研究了阴极材料与器件有机层界面电荷聚集之间的关系.结果表明,界面电荷聚集与阴极材料密切相关,LiF-Al复合层阴极器件的界面聚集电荷最少,而Al金属阴极器件的界面聚集电荷最多.同时,通过测试器件的光电性能,进一步研究了阴极材料对OLED发光特性的影响.实验结果显示,LiF-Al复合层阴极器件具有最大的发光亮度和效率、最小的启亮电压和驱动电压.     

有机电致发光材料的研究

有机LED平板显示器具有效率高、亮度强、能耗低、色彩丰富以及响应速度快等优点，是近年来发光显示领域的研究热点。作为有机LED平板显示器的物质基础，电致发光(EL)材料是直接影响其器件性能的关键因素。本文在阐述器件结构和发光机理的基础上，重点介绍有机LED器件的电致发光材料，并对其应用前景进行展望。     

有机LED平板显示器电致发光材料的研究

有机LED平板显示器具有效率高、亮度强、能耗低、色彩丰富以及响应速度快等优点。是近年来发光显示领域的研究热点。作为有机LED平板显示器的物质基础，电致发光（EL）材料是直接影响其器件性能的关键因素。本文在阐述器件结构和发光机理的基础上．重点介绍了有机LED器件的电致发光材料，并对其应用前景进行了展望。