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用氧化剂KMnO4溶液处理ITO表面制备了高效的有机电致发光器件(OLED)。将涂有ITO的玻璃薄片浸泡到不同浓度的KMnO4溶液中,并对玻璃薄片进行不同时间的超声处理,结果发现,随着KMnO4浓度和超声时间的不同,器件的性能都有不同程度的变化。经过优化发现,当KMnO4浓度为0.005wt%超声时间为15min时,器件的亮度提高1倍多,开启电压也有明显降低,器件的效率提高了近51%。通过原子力显微镜(AFM)对ITO表面进行了对比分析发现,经过KMnO4溶液处理后的器件表面粗糙度降低了;同时,KMnO4溶液的强氧化性提高了样片的表面活性,从而使器件的性能得以提高。
An efficient organic electroluminescent device (OLED) was prepared by treating ITO surface with oxidant KMnO4 solution. Soaked ITO glass into different concentrations of KMnO4 solution, and the glass flakes were sonicated at different times. The results showed that the performance of the devices varied with different concentrations of KMnO4 and ultrasonic time. After optimization, it was found that when the concentration of KMnO4 was 0.005wt% and the ultrasonic time was 15min, the brightness of the device was more than doubled, the turn-on voltage was significantly reduced, and the device efficiency increased by nearly 51%. The atomic force microscopy (AFM) of the ITO surface was compared and found that after the KMnO4 solution processing device surface roughness decreased; the same time, the strong oxidation of KMnO4 solution increased the sample surface activity, so that the performance of the device can be improved .