摘要
以Bphen:Li/WO3作为电荷产生层制备了低压、高效有机叠层白光器件.实验中,首先在器件中引入高导电性的载流子注入和传输层,有效降低了器件的驱动电压,然后通过电荷产生层垂直堆叠两个低压白光器件,获得了低压、高效有机叠层白光器件.叠层器件性能与单发光单元的器件相比较,其亮度及效率均有大幅提高,叠层器件的最大电流效率达到了17cd/A,在相同的电流密度下,叠层器件的效率约为传统器件的2.3倍,同时由于在叠层结构中引入了高导电性的载流子传输层,有效降低了器件的驱动电压,显著改善了白光器件的流明效率.叠层器件的流明效率相对于单发光单元器件提高了53%.
We report a white tandem organic light-emitting device （TOLED） with high efficiency and low drive voltage using Bphen： Li/WO3 as the interconnecting layer. The TOLED have been fabricated by connecting two low-voltage driving white units with conductive transport layers. The tandem two-unit device produces two higher luminance efficiency than that expected of a single-unit device. A maximum efficiency of 17cd/A is achieved by the tandem device comprised of two white-fluorescent OLEDs. The power efficiency of tandem white organic light-emitting device is enhanced by 53% as compared to the control device.
基金
国家自然科学基金资助项目(批准号:90201034
60477014)~~
