Luminescence centers in α-Bi2O3 ceramics

Abstract

Luminescence photoexcitation spectra of α-Bi 2 O 3 ceramics are investigated. Luminescence spectra were deconvoluted into fundamental components using the Alentsev-Fok method. It is established that the luminescence spectra of α-Bi 2 O 3 ceramics consist of three fundamental bands with maxima at 2.75, 2.40, and 1.97 eV. A comparison of the results with those from an investigation of luminescence of various modifications of bismuth oxide and bismuth germanates suggests that luminescence of these compounds is caused by radiation processes that occur in structural complexes that contain the bismuth ion in a nearest oxygen environment.

X-ray photoelectron spectroscopy and luminescent properties of Y2O3:Bi3+ phosphor

“…Bordun et al [25,26] studied the luminescence centers in thin films of yttrium oxide and yttrium-aluminum garnet activated with bismuth. They stated that according to literature, the appearance of two types of emission centers is due to the placement of Bi 3+ in two nonequivalent yttrium sites of the Y 2 O 3 :Bi crystal lattice with C 2 and C 3i (S 6 ) symmetry.…”

Growth, structure, luminescence and mechanical resonance of Bi2O3nano- and microwires

“…34 The 2.33 eV and the 1.95 eV emission bands have been attributed to a Bi ion in the closest environment of three oxygen ions. 36 Actually, trivalent bismuth cations in inorganic compounds exhibit interesting luminescence properties related to their 6s 2 configuration. 37,38 Above 80 K, radiative transitions are mainly assigned to 3 P 1 → 1 S 0 transitions 13,35,37 or charge transfer transitions between oxygen ligands and Bi 3+ ions, 38 giving rise to luminescence spectra peaked in the blue to green region under UV excitation.…”

Elastic and thermodynamic properties of α-Bi2O3 at high pressures: Study of mechanical and dynamical stability

“…The structural, vibrational, optical, electric and magnetic properties of -Bi 2 O 3 have been studied under different conditions of temperature or pressure [1,[8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. These studies report that this material has unusual magnetic and electrical properties such as the existence of internal magnetic fields and a longitudinal magnetoelectric effect [9,10].…”