OPTICAL BAND GAP AND PHOTOLUMINESCENCE STUDIES OF SAMARIUM DOPED BARIUM ZIRCONATE PEROVSKITE PREPARED BY SOLID STATE REACTION ROUTE
Abstract
The structural and optical properties of Ba1- x Sm2x/3ZrO3 (x = 0.02, 0.04, 0.06, 0.08, 0.10) ceramics prepared by the solid state reaction method are considered. The x-ray diffraction data confirm the cubic perovskite phase of all the compositions with space group Pm ` 3m. The effect of Sm3+ substitution on the optical band gap and photoluminescence properties of barium zirconate are discussed. The optical band gap decreases from 3.43 to 2.98 eV with increasing Sm3+ content. The Urbach energy has been found to increase with rise in concentration of dopant species. The photoluminescence spectra show an intense violet-blue emission characteristic of the barium zirconate perovskite. Visible emission due to intra-4f transitions of Sm3+ ions from4G5/2 higher excited state to6Hj (j = 5/2, 7/2, 9/2 etc) ground states has been observed in the range of 550-700 nm.
About the Authors
A. . Satapathy
Birla Institute of Technology
Russian Federation
Russian Federation
E. . Sinha
Birla Institute of Technology
Russian Federation
Russian Federation
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Review
For citations:
Satapathy A., Sinha E. OPTICAL BAND GAP AND PHOTOLUMINESCENCE STUDIES OF SAMARIUM DOPED BARIUM ZIRCONATE PEROVSKITE PREPARED BY SOLID STATE REACTION ROUTE. Zhurnal Prikladnoii Spektroskopii. 2017;84(6):864-879. (In Russ.)
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