基于空穴注入层摩擦定向的偏振蓝光聚合物电致发光器件

研究了利用摩擦空穴注入层3,4-乙撑二氧噻吩:聚苯乙烯磺酸(PEDOT:PSS)作为定向层实现聚芴(PFO)薄膜的偏振电致发光，蓝光的色坐标为(0.20，0.21).从聚合物薄膜的紫外可见吸收和光致发光偏振特性，研究了不同定向层摩擦强度、退火温度以及退火时间下PFO薄膜的二向色性，并证明退火温度是决定器件偏振性能的关键因素.当摩擦强度为25 mm退火温度和时间分别为200℃和30 min时，得到较好的偏振性能，器件的电致发光偏振率约为3. 关键词： 偏振发光 摩擦定向 聚合物电致发光 空穴注入层

Polarized blue polymer light-emitting diodes utilizing rubbed hole injection layers

Polarized blue electroluminescence has been achieved from the oriented poly (9, 9-dioctylfluorene) (PFO) film on a rubbed hole injection layer poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) at the CIE coordinates of (0.20, 0.21). Polarized absorption and photoluminescence spectra reveal that the dichroism of the PFO film is influenced by the rubbing strength of the alignment layer, the annealing temperature, and annealing time, among which the annealing temperature is the most significant factor. An electroluminescence polarization ratio of about 3 is achieved when the rubbing depth is 50μm, the annealing temperature is 200℃ and the annealing time is 30 min.