表面活性剂掺杂的聚芴类蓝光器件

液晶与显示 , 2005, 20(3): 195-199. doi: 10.3969/j.issn.1007-2780.2005.03.005

表面活性剂掺杂的聚芴类蓝光器件

粟立军 ^1, , 杨伟 ^2, , 杨晓辉 ^3, , 刘传珍 ^4, , 张赤 ^5, , 甄红宇 ^6, , 曹镛 ^7,

基金项目: 广东省自然科学基金(011545) 国家自然科学基金(50173008)

Efficient Blue Polymer Light Emitting Diode Based on Doping Polyfluorene with Surfactantlike Additives

用PVK作空穴传输/电子阻挡层,提高了ITO/PEDOT/PVK/PDOF/Ba/Al器件的发光效率,但器件的启亮电压也增加.同PDOF单层器件相比,相同驱动电压下双层器件的电流明显减小而器件的发光效率却提高.在芴均聚物(PDOF)和芴共聚物(PF10T)中掺杂Li-NPTEOS表面活性剂可以提高器件的EL效率,有效地抑制EL光谱红移现象.掺杂浓度在10 %～20 %(质量分数),PVK作为电子阻挡层的蓝光器件的EL效率可达1 %.掺杂引起的PFO能级的改变降低了空穴注入的势垒高度,使电子和空穴注入趋于平衡以及在电场作用下Li-NPTEOS的偶极取向作用可能是提高量子效率、降低启亮电压和工作电压的根本原因.

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表面活性剂掺杂的聚芴类蓝光器件

Efficient Blue Polymer Light Emitting Diode Based on Doping Polyfluorene with Surfactantlike Additives

参考文献