The quest for improved visible light absorption in ZnO-based photocatalysts and photodetectors is a prevailing research problem. One method of solving this problem is by narrowing the band gap of this material well into the range of visible light energy. In this work, we have demonstrated considerable band narrowing into the visible region in our electrospun ternary ZnO–Zn₂SnO₄ nanofibres. We also showed that band narrowing is highly dependent on the amount of Sn in the synthesized composite which could be attributed to the creation of localized states in the ZnO band and the attendant structural changes. However, beyond 15%wt doping there were observed changes in the trend of the bandgap reduction, crystallite sizes, and width of the localized states in the ternary ZnO–Zn₂SnO₄ band. The details of experimental procedures and discussion of results have been included in this paper.

寻求在基于ZnO的光催化剂和光电检测器中改善可见光吸收是一个主要的研究问题。解决该问题的一种方法是通过将这种材料的带隙很好地缩小到可见光能量范围内。在这项工作中，我们证明了在我们的电纺三元ZnO-Zn ₂ SnO ₄纳米纤维中，可见带明显变窄。我们还表明，谱带变窄高度依赖于合成复合物中Sn的含量，这可能归因于ZnO谱带中局部状态的产生和伴随的结构变化。然而，超过15％wt的掺杂，三元ZnO-Zn中的带隙减少趋势，微晶尺寸和局部态宽度的变化都被观察到₂ SnO ₄带。实验程序的细节和结果的讨论已包括在本文中。