Xin Mei
School of Physics and Materials Engineering, Dalian Nationalities University, Dalian 116600, China.
Liaoning Key Laboratory of Optoelectronic Films and Materials, Dalian Nationalities University, Dalian 116600, China.
Molecules. 2022 Aug 20;27(16):5308. doi: 10.3390/molecules27165308.
ZnO and cerium-doped ZnO on a glass substrate have been prepared by the sol-gel method using the spin coating technique and water bath growth process. Ce-doping concentration on film structure, morphology, and optical properties is investigated. The result indicated that the hexagonal wurtzite ZnO with high crystalline quality formed on the substrate. The crystal parameters a and c decreased, crystal size increased, and the compressive strain formed after Ce-doping. Formed un-, 3%, 6%, 12% Ce-doped ZnO film has a spherical shape with a size between 8.6-31, 14-52, 18-56, and 20-91 nm, respectively. All films had good absorption of 300-400 nm ultraviolet light, in particular, the absorption of near ultraviolet (370-400 nm) increased after doping of Ce. The transmittance of light between 400-800 nm decreased with Ce-doping concentration. The band gap energy increased after Ce-doping reaching better optical behavior for preparing ZnO heterostructured thin-film. All film emitted intense blue emission under 375 nm excitation at room temperature. This indicated the film can have application in optoelectronic devices.
采用旋涂技术和水浴生长工艺，通过溶胶 - 凝胶法在玻璃基板上制备了氧化锌和铈掺杂的氧化锌。研究了铈掺杂浓度对薄膜结构、形貌和光学性能的影响。结果表明，在基板上形成了具有高结晶质量的六方纤锌矿氧化锌。铈掺杂后，晶体参数a和c减小，晶体尺寸增大，并形成了压应变。形成的未掺杂、3%、6%、12%铈掺杂的氧化锌薄膜呈球形，尺寸分别在8.6 - 31、14 - 52、18 - 56和20 - 91纳米之间。所有薄膜对300 - 400纳米的紫外光都有良好的吸收，特别是铈掺杂后，近紫外光（370 - 400纳米）的吸收增加。随着铈掺杂浓度的增加，400 - 800纳米之间的光透过率降低。铈掺杂后带隙能量增加，为制备氧化锌异质结构薄膜提供了更好的光学性能。所有薄膜在室温下375纳米激发下均发出强烈的蓝光发射。这表明该薄膜可应用于光电器件。
