半导体光电, 2018, 39 (3): 332, 网络出版: 2018-06-29
有机电荷产生层对叠层磷光OLED器件性能的影响
Effect of Organic Charge Generation Layer on Optoelectronic Performance of Tandem Phosphorescent OLED
叠层有机磷光器件 有机电荷产生层 电荷注入层 光电性能 tandem organic lightemitting diodes organic charge generation layer charge injection layer photoelectric performance
摘要
采用C60/pentanece作为非掺杂电荷产生层, 并在其两边各插入Al和MoO3 薄层作为C60和pentanece的电子注入层和空穴注入层, 在此基础上制备了结构为ITO/NPB/mCP∶8wt% Ir(ppy)3/TPBi/Al/C60/pentanece/MoO3/NPB/mCP∶8wt% Ir(ppy)3/TPBi/Cs2CO3/Al的双发光单元叠层绿色磷光有机发光器件(OLED)。实验表明, 增加Al和MoO3电荷注入层, 可有效改善有机电荷产生层的电荷注入能力, 提高叠层OLED器件的发光亮度和电流效率。叠层器件的启亮电压明显低于单个器件的1/2, 但电流效率是单层器件的两倍以上。当Al/C60/pentanece/MoO3的厚度分别是3、15、25和1nm时, 叠层OLED器件具有最佳的光电性能, 其最大亮度和最大电流效率分别是7920.0cd/m2和16.4cd/A。
Abstract
In this report, C60/pentacene was applied as the nondoped charge generation layer (CGL) to achieve excellent performance of TOLEDs with using Al and MoO3 layer as the electron and hole injection layers, respectively. Green phosphorescence TOLEDs with the structure of ITO/NPB/mCP∶Ir(ppy)3/TPBi/Al/C60/pentanece/MoO3/NPB/mCP∶Ir(ppy)3/TPBi/Cs2CO3/Al were fabricated. Experimental results show that inserting Al and MoO3 layer can effectively increase the charge injection capacity of organic CGL, and improve the luminance and current efficiency of TOLEDs. The turnon voltage of TOLEDs is much lower than that of singleunit device, but the current efficiency is more than 2 times as that of the singleunit device. TOLEDs can exhibit excellent photoelectric performance when the thickness of Al/C60/pentanece/MoO3 is 3, 15, 25 or 1nm. The maximum luminance and current efficiency are 7920.0cd/m2 and 16.4cd/A, respectively.
王振, 柳菲, 郑新, 陈爱, 谢嘉凤. 有机电荷产生层对叠层磷光OLED器件性能的影响[J]. 半导体光电, 2018, 39(3): 332. WANG Zhen, LIU Fei, ZHENG Xin, CHEN Ai, XIE Jiafeng. Effect of Organic Charge Generation Layer on Optoelectronic Performance of Tandem Phosphorescent OLED[J]. Semiconductor Optoelectronics, 2018, 39(3): 332.