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采用低温水热法在掺铝氧化锌(AZO)基底上,通过在溶解有乙酸锌(ZnAc_2)与六次甲基四胺(HMTA)的反应溶液中引入NH_4NO_3与In(NO_3)_3,制备出不同形貌和光学性能的ZnO纳米柱阵列。采用扫描电子显微镜、透射光谱、光致发光发射谱研究了NH_4NO_3与In(NO_3)_3对ZnO纳米柱阵列的结构和光学性质的影响。结果表明:溶液中添加的In(NO_3)_3显著地降低了ZnO纳米柱的密度,增大了纳米柱之间的间距,从而能够作为太阳能电池的减反射层使用。通过控制NH_4NO_3与In(NO_3)_3在反应溶液中的添加比例,可以在3.35~3.62 e V范围内调控所制备的ZnO纳米柱的光学带隙宽度。
The low-temperature hydrothermal method was used to prepare NH_4NO_3 and In (NO_3) _3 on aluminum-doped zinc oxide (AZO) substrate by introducing reaction solution of zinc acetate (ZnAc_2) and hexamethylenetetramine (HMTA) ZnO nanotube arrays with different morphologies and optical properties. The effects of NH_4NO_3 and In (NO_3) _3 on the structure and optical properties of ZnO nanowire arrays were investigated by scanning electron microscopy, transmission spectroscopy and photoluminescence emission spectroscopy. The results show that the addition of In (NO_3) _3 significantly reduces the density of ZnO nanorods and increases the spacing between the nanorods so that they can be used as antireflection coatings for solar cells. By controlling the addition ratio of NH_4NO_3 to In (NO_3) _3 in the reaction solution, the optical band gap of ZnO nanorods can be controlled within the range of 3.35 ~ 3.62 eV.