Unveiling the gas sensing potential of copper-doped zinc oxide thin films deposition by spray pyrolysis

Sustainable Chemistry One World Pub Date : 2025-09-30 DOI:10.1016/j.scowo.2025.100123

Ayush Singh Chauhan , Pukhrambam Dipak , Uday Pratap Singh Gahlaut , Yogesh Chandra Goswami

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Abstract

By using spray pyrolysis technique,nanocrystalline undope and Cu doped ZnO thin films were synthesized.The prepared thin films were characterized by Field emission scanning electron microscopy (FESEM), UV–vis absorption spectroscopy, X-ray diffraction (XRD), Photoluminescence spectrophotometer, current voltage characteristics.At room temperature NH₃ (Ammonia) gas sensing were investigated for different concentrations of ammonia gas. The XRD patterns indicate a hexagonal wurtize structure.A decrease in crystallite size with increasing Cu concentration has been observed.UV Vis spectroscopy indicates decrease in band gap energy with increasing doping with Cu. Nanoflakes morphology was observed from FESEM.With increasing Cu concentration in ZnO lattice intensity of nanoflakes was decreased. Gas sensing analysis of thin films were analyzed, The highest sensing response was seen for 2 ppm ammonia gas concentration.Based on the gas sensing data analysis, the Cu doped ZnO thin films is an efficient active material for gas sensors having sensitivity of 15.604 ppm⁻¹.

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揭示了喷雾热解沉积掺杂铜氧化锌薄膜的气敏潜力

采用喷雾热解技术合成了纳米晶无掺杂和Cu掺杂ZnO薄膜。采用场发射扫描电镜（FESEM）、紫外-可见吸收光谱（UV-vis absorption spectroscopy）、x射线衍射仪（XRD）、光致发光分光光度计（Photoluminescence分光光度计）、电流电压特性等对制备的薄膜进行了表征。在室温下对不同浓度的氨气进行了气敏试验。XRD谱图显示为六角形纤化结构。随着铜浓度的增加，晶粒尺寸减小。紫外可见光谱分析表明，随着铜掺杂量的增加，带隙能量降低。FESEM观察了纳米薄片的形貌。随着ZnO中Cu浓度的增加，纳米片的晶格强度降低。对薄膜进行气敏分析，当氨气浓度为2 ppm时，传感响应最高。基于气敏数据分析，Cu掺杂ZnO薄膜是气敏传感器的有效活性材料，其灵敏度为15.604 ppm−1。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Sustainable Chemistry One World

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