机构地区: 华南理工大学材料科学与工程学院高分子光电材料与元器件研究所
出 处: 《物理学报》 2009年第2期1224-1228,共5页
摘 要: 利用聚合物的不同溶解性,研究用旋涂方法制备双层高分子白光二极管(WPLED),采用器件结构为:ITO/PEDOT(50nm)/PVK:PFO-BT:PFO-DBT(40nm)/PFO(40nm)/Ba(4nm)/Al(120nm),当相对比例为PVK:PFO-BT:PFO-DBT=1∶4%:3%时,得到标准白光,最大电流效率为2.4cd/A,最大亮度为3215cd/m2,色坐标为(0.33,0.34).用水溶性的聚电介质层修饰阴极界面,器件效率可以进一步提高到5.28cd/A,色度坐标仍保持在(0.34,0.36),同时器件表现出较好的光谱稳定性. White polymer light-emitting diodes (WPLEDs) with bilayer structure were fabricated by spin coating method using polymers of different solubilities. The device structure used here is ITO/PEDOT(50 nm)/PVK∶PFO-BT∶PFO-DBT(40 nm)/PFO(40 nm)/Ba(4 nm)/Al(120 nm),at the weight ratio of 100∶4∶3 (PVK∶PFO-BT∶PFO-DBT). White fluorescent light emission with CIE coordinates of (0.33, 0.34) is achieved, and the maximal luminance efficiency of 2.4 cd/A and the maximal luminance of 3215 cd/m^2 are obtained. By attaching a layer of water-soluble electronic transporting material of PFN to the cathode, the maximal luminance efficiencies increase up to 5.28 cd/A with CIE coordinates kept at (0.34, 0.36), and the device stabitity is also improved.
领 域: [电子电信] [石油与天然气工程]