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本文采用高真空热蒸镀法于衬底温度70℃下在玻璃基片上制备C60和rubrene混合薄膜。将两种材料的粉末置于不同的坩埚中共同蒸发,通过控制坩埚的加热温度来控制混合的比例,达到了制备混合薄膜的效果。利用原子力显微镜和台阶仪对薄膜的表面形貌和厚度进行测量,通过紫外-可见分光光度计获得了薄膜的透射谱和反射谱。实验结果表明了混合后的薄膜并不是都出现明显的吸收峰值。当C60:rubrene混合比为1:4、1:2、1:1、2:1、4:1时,利用透射谱和反射谱分别作出吸收光谱,借用Tauc公式求得能隙值,发现当混合比为1:1时,薄膜表面形貌最为均匀,吸收峰值最大,能隙最小。
In this paper, a high vacuum thermal evaporation method was used to fabricate C60 and rubrene hybrid films on a glass substrate at a substrate temperature of 70 ° C. The two materials were placed in different crucible powder co-evaporation, by controlling the heating temperature of the crucible to control the mixing ratio, to achieve the effect of mixing films. The morphology and thickness of the film were measured by atomic force microscopy and step spectroscopy. The transmission and reflection spectra of the film were obtained by UV - visible spectrophotometer. The experimental results show that the mixed film does not show obvious absorption peaks. When the C60: rubrene mixing ratio is 1: 4, 1: 2, 1: 1, 2: 1 and 4: 1, the absorption spectra were respectively obtained by transmission spectrum and reflection spectrum. When the mixing ratio is 1: 1, the film surface morphology is the most uniform, the absorption peak is the largest and the energy gap is the smallest.