Luminescence studies of perovskite structured titanates: A review

Abstract

Apart from widely known dielectric and ferroelectric properties, the perovskite type materials also constitute a class of materials, which are recently investigated for their optical properties. These materials are being used for fabrication of various microelectronics and optoelectronic devices. Photoluminescence (PL), mechanoluminescence (ML) and thermoluminescence (TL) are such phenomena offering numerous applications in different fields like electro-optics, flat panel displays, LED technology, sensors, dynamic visualization etc.

Effect of Bi2+ ions on the photoluminescence properties of BaTiO3:Dy3+ perovskite phosphors for LEDs application

“…The selection of apt base materials and dopants (e.g., rare earth ions), is crucial to fabricate phosphors of intense photoluminescence. Of late, Perovskite fabricated titanate exhibiting optical properties has been the centre of attention to most researchers on account of its low phonon energy, stable physical as well as chemical traits [3]. Enhancement of the e cacies of perovskite LEDs has experienced dramatic progress in the recent decades.…”

(Ba,Sr)TiO3:RE perovskite phosphors (RE = Dy, Eu): nitrate pyrolysis synthesis, enhanced photoluminescence, and reversible emission against heating

“…Moreover, increasing number of researchers have recently began to pay more attention to the optical properties of perovskite structured titanate due to its low phonon energy and stable physical and chemical properties. 10,11 The preparation conditions of titanate are not very harsh and hence, titanate phosphors have always been the subject of attention. Concerning dopants, Eu 3+ is usually selected because of its specific energy level and high radiative recombination rate.…”

Synthesis and luminescence properties of cubic‐shaped Ca1‐xTiO3:Eu3+ particles

“…[6][7][8][9][10][11] Among them, the calcium titanate-based red phosphors have attracted much attention because of their excellent optical, electrical and thermal properties. [12][13][14][15][16][17][18][19][20][21][22] The rare-earth Eu 3+ ions doped in different host materials can be excited and emit red light because of their characteristic f-f transition. [23] It has been shown that calcium titanate (CaTiO 3 ) acts as an excellent host material for rare-earth ions doped phosphors, [24,25] and the photoluminescence (PL) performance is closely related to defects, morphology and synthesis methods of the phosphors.…”

“…Many new red phosphors like rare‐earth activated tungstate, molybdate, phosphate, vanadate and titanate compounds have been explored . Among them, the calcium titanate‐based red phosphors have attracted much attention because of their excellent optical, electrical and thermal properties …”