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提出用碱溶液修饰硅纳米线阵列制作太阳能绒面的方法。实验中首先采用金属催化化学腐蚀法在Si(100)基底上制备了定向排列的硅纳米线阵列,然后将纳米线阵列浸入碱溶液中进行修饰,修饰时间分别为10,30,50,60,90s。通过扫描电子显微镜(SEM)对硅纳米线阵列进行形貌分析,采用太阳能测试系统附带的积分球测量纳米线阵列绒面结构的反射光谱。通过测量和分析发现硅纳线阵列在碱溶液中修饰30s时表面分布均匀,在400～1000nm波段的综合反射率低于4%。结果表明碱溶液修饰纳米线阵列的方法能够有效分散束状硅纳米线阵列,明显降低绒面的反射率,并且初步分析了碱溶液修饰硅纳米线阵列的分散机理。
A method for making solar suede by modifying silicon nanowire arrays with alkaline solution is proposed. In the experiment, aligned arrays of silicon nanowires were fabricated on Si (100) substrates by metal-catalyzed chemical etching. The nanowire arrays were then immersed in an alkaline solution for modification. The modification time was 10, 30, 50, 60, 90s. The morphology of the silicon nanowire arrays was analyzed by scanning electron microscopy (SEM), and the reflectance spectra of the nanowire array suede structures were measured by using the integrating sphere attached to the solar energy testing system. Through the measurement and analysis, the surface distribution of the SiN array is uniform when it is modified for 30s in alkaline solution, and the reflectance in the 400 ~ 1000nm band is less than 4%. The results show that the method of alkaline solution modified nanowire arrays can effectively disperse the bundle silicon nanowire arrays, significantly reduce the reflectance of the suede surface, and preliminary analysis of the dispersion mechanism of the alkali solution-modified silicon nanowire arrays.