کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5454574 | 1514356 | 2017 | 30 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Study of structural, dielectric, optical properties and electronic structure of Cr-doped LaInO3 perovskite nanoparticles
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
This work reports the change in the structural, dielectric and optical behaviour of Cr-doped LaInO3 nanoparticles synthesized via sol-gel method. X-ray diffraction patterns confirm that systems crystallize in orthorhombic Pnma space group. Raman spectroscopy measurements exhibit blue-shift in Raman modes with Cr-doping due to the compressive stress introduced by smaller Cr3Â + cations. Trivalent oxidation state of Cr was confirmed from Cr(2p) core-level X-ray photoemission spectroscopy measurements, while valence band spectra suggest the absence of electronic states near Fermi level. High-resolution Ultraviolet photoemission spectra near Fermi level shows the electronic density of states arises sharply near Fermi level. Room temperature dielectric constant decreases with increasing Cr-concentration, which shows that conductivity has been increased after Cr-doping. Ultraviolet-visible spectroscopy measurements provide band gap of 4.8Â eV for LaInO3 and Cr-doped LaInO3nanoparticles.Moreover, Cr-doped LaInO3systems exhibit an intermediate band gap of 3Â eV, which might have been created from Cr(3d) states.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Characterization - Volume 131, September 2017, Pages 108-115
Journal: Materials Characterization - Volume 131, September 2017, Pages 108-115
نویسندگان
Shiv Kumar, G.D. Dwivedi, Amish G. Joshi, Sandip Chatterjee, A.K. Ghosh,