The study investigates the impact of nickel doping on the structural, optical, morphological, and gas sensing properties of zinc oxide (ZnO) thin films. Films were synthesized using a spray pyrolysis technique on a glass substrate. Structural and morphological analyses were conducted through X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM). XRD revealed a hexagonal wurtzite structure, primarily aligned along (101) planes. However, nickel doping prompted a preferred orientation towards (002) plane. Lattice parameters decreased systematically, due to the ionic radii mismatch between dopant and host. FESEM showed a nanoflake morphology. Compositional analysis with energy dispersive X-ray spectroscopy (EDX) confirmed successful doping. Optical analysis using UV–Vis spectroscopy indicated high transmission in undoped ZnO films. However reduced band gap values have been reduced with nickel incorporation. Gas sensing response observed to be significantly improved with Nickel doping in ZnO.

该研究调查了镍掺杂对氧化锌 (ZnO) 薄膜的结构、光学、形态和气敏性能的影响。使用喷雾热解技术在玻璃基板上合成薄膜。通过 X 射线衍射 (XRD) 和场发射扫描电子显微镜 (FESEM) 进行结构和形态分析。XRD 显示出六方纤锌矿结构，主要沿 (101) 平面排列。然而，镍掺杂促使了向（002）面的优选取向。由于掺杂剂和主体之间的离子半径不匹配，晶格参数系统地降低。FESEM 显示出纳米片形态。使用能量色散 X 射线光谱 (EDX) 进行的成分分析证实了掺杂成功。使用紫外-可见光谱的光学分析表明未掺杂的 ZnO 薄膜具有高透射率。然而，随着镍的掺入，带隙值降低了。观察到在 ZnO 中掺杂镍可显着改善气敏响应。