Crystal Field Analysis of Cr3+Doped SrAl2O4Spinel

Stanciu, M.; Ciresan, M. G.; Avram, N.M.

doi:10.12693/aphyspola.116.544

Cited by 8 publications

(3 citation statements)

References 17 publications

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“…3+ are known to be within 650-850 nm for several aluminates as well as for Al2O4 [22][23][24][25][26][27][28][29]. Therefore the narrow bands recorded at 692 nm and 713 nm under X-ray irradiation are due to spin-forbidden 2 E -4 A2 transition in Cr…”

Section: The Relative Narrow Luminescence Bands Of Crmentioning

confidence: 99%

The search for defects in undoped SrAl2O4 material

et al. 2019

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SrAl2O4:Eu,Dy is a very efficient long afterglow phosphor with wide range of possible applications. The lumi-nescence properties and the possible luminescence mechanism of this material have been studied extensively, but there is almost no information available about the undoped material. Therefore, this article deals with the luminescence and thermally stimulate d luminescence of an undoped SrAl2O4, revealing the possible defects that might be involved in the creation of the long afterglow in doped material. We conclude that undoped material exhibits some luminescence under X-ray irradiation in low temperature; close to room temperatures lumines-cence is almost fully thermally quenched in comparison to low temperatures. We can observe F and F2 center luminescence as well as trace metal luminescence in the emission spectrum. TSL glow curve yields the peaks that are close to those observed in material with Eu and Dy doping; therefore these peaks are clearly related to intrinsic defects. The peak at around 400 K, that is shifting with rare earth doping, might be due to dopant interaction with intrinsic defects.

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Section: The Relative Narrow Luminescence Bands Of Crmentioning

confidence: 99%

The search for defects in undoped SrAl2O4 material

et al. 2019

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“…ECM has been successfully applied for the calculations of energy level of rare earth ions ( [14,17,18] and references therein) and transition metal ions ( [19][20][21][22][23] and references therein).…”

Section: Methods Of Calculationsmentioning

confidence: 99%

Comparative analysis of crystal field effects and energy level scheme of six-fold coordinated Cr4+ ion in the pyrochlores, Y2B2O7 (B=Ti4+, Sn4+)

Brik

Srivastava

Avram

2011

Journal of Luminescence

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“…Until now, the ECM has been shown to be a reliable tool for successful description of spectra of rare earth ions [26][27][28] and transition metal ions [29][30][31][32][33], which serves as a firm justification of application of ECM for LiAlO 2 :Mn 2+ .…”

Section: Methods Of Calculationsmentioning

confidence: 99%