A single and mixed-phases SnO2 (M-SnO2) nanostructures were synthesized by a simple spray pyrolysis method. The nanostructural crystallinity, surface morphology and optical evolution of Ba-doped tetragonal phase SnO2 with different Ba contents were studied by x-ray diffraction, atomic force microscopy, ultraviolet-visible spectroscopy and photoluminescence spectral measurements. The M-SnO2 with orthorhombic as well as tetragonal phases are formed in 6% Ba-doped SnO2 sample and it exhibits the highest average transmittance 86% with blue-shift of the optical band gap. The observed strong red emission at ∼ 615 nm might be encouraging for the implementation of red emission based on Ba-doped transparent conducting electrodes.

中文翻译：

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通过喷雾热解法合成和表征四方和斜方 Sn1-xBaxO2 纳米结构

通过简单的喷雾热解法合成了单相和混合相 SnO2 (M-SnO2) 纳米结构。通过X射线衍射、原子力显微镜、紫外-可见光谱和光致发光光谱测量研究了具有不同Ba含量的Ba掺杂四方相SnO2的纳米结构结晶度、表面形貌和光学演化。具有正交相和四方相的 M-SnO2 在 6% Ba 掺杂的 SnO2 样品中形成，它表现出最高的平均透射率 86%，光学带隙发生蓝移。在~615 nm 处观察到的强红色发射可能有助于基于 Ba 掺杂透明导电电极的红色发射的实施。