一种基于PFO掺杂的理想白光有机电致发光器件

摘要

研究了以芴类蓝光材料PFO为主体,通过掺杂MEH-PPV得到单层的白光有机电致发光器件,并从掺杂浓度对器件的光谱特性和色坐标稳定性的影响方面对其发光性能进行了分析研究.在MEH-PPV以2.5 Wt％掺杂时,器件开启电压为3V,发光色坐标可达到标准白光等能点(0.33,0.33),器件发光色坐标在5～20 V很宽的范围内随电压变化幅度很小,基本稳定在白光区.%In the present paper, the electroluminescence emission from a doped polymer layer was studied. The blue fluorene PR) was used as the host material and MEH-PPV as the dopant. The spectral characteristics and color stability of the emission on CIE chromaticity diagram were investigated. With the doping ratio of 2. 5 Wt%, the device shows turn-on voltage of 3 V, and color coordinates of (0. 33, 0. 33) at 11 V. The color coordinates of the device was stable with changing voltage in a large range, and located in the ideal white area in the range of 5~20 V voltage.