In this work, perovskite La_1−xNi_xMnO_2.75 (with x = 0, 0.1, 0.2, 0.3 and 0.4) is synthesized by spray pyrolysis route at 460 °C. X-ray pattern analysis showed orthorhombic structure of the pure and Ni-doped. Based on X-ray analysis interesting parameters are then extracted such as crystallite size, micro-strain ($\epsilon$) and dislocation density ($\delta$). A high transmittance coefficient at 76 % and the optical band gap varies from 2.33 to 2.85 eV are revealed by the spectroscopy analysis. The Urbach energy varies from 273 to 381.7 meV. Furthermore, refractive index, extinction coefficient, and dielectric constants versus photon wavelength are plotted for pure and Ni-doped LaMnO_2.75 layers. PL measurements analysis describe peaks within violet, blue, and green emission ranges. Finally, Doppler-broadening energy studies have been performed to investigate the defect structural evolution in polycrystalline La_1−xNi_xMnO_2.75. The studies derived S, R and W parameters are used to perovskite samples.

在这项工作中，钙钛矿型La _{1- x} Ni _x MnO _2.75（x = 0、0.1、0.2、0.3和0.4）通过460°C的喷雾热解路线合成。X射线图谱分析显示了纯的和掺杂的镍的正交晶体结构。根据X射线分析，然后提取有趣的参数，例如微晶尺寸，微应变（$\epsilon$）和位错密度（$\delta$）。通过光谱分析显示出在76％处的高透射系数和光学带隙在2.33至2.85eV之间变化。Urbach能量在273至381.7 meV之间变化。此外，针对纯的和掺Ni的LaMnO _2.75层绘制了折射率，消光系数和介电常数与光子波长的关系图。PL测量分析描述了紫色，蓝色和绿色发射范围内的峰。最后，进行了多普勒增宽能量研究，以研究多晶La _{1- x} Ni _x MnO _2.75中的缺陷结构演变。研究得出的S，R和W参数用于钙钛矿样品。