Cation distribution and photoluminescence properties of Mn-doped ZnGa2O4 nanoparticles

Liu, Jian; Duan, Xiulan; Yang, Zhongmin; Jiang, Huaidong

doi:10.1016/j.jpcs.2015.01.009

Cited by 18 publications

(7 citation statements)

References 27 publications

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“…Generally, green emission around 510 nm originates from Mn 2+ located in the tetrahedral site ( T d ) in the spinel structure. However, a peak appears at a slightly longer wavelength side when Mn 2+ occupies the octahedral site ( O h ) by a difference in preparation conditions. , The asymmetric PL spectrum of 0.32ZGO can be deconvoluted into at least two Gaussian components peaking at 525 and 546 nm (shown in the inset of Figure b); these peaks are attributable to the T d and O h peaks, respectively. Usually, the location of Mn 2+ has been investigated by electron spin resonance (ESR) measurements.…”

Section: Resultsmentioning

confidence: 99%

“…When a transition-metal or rare-earth-metal ion was doped into this material, various colors of luminescence were observed. For example, when a Cr 3+ or Mn 2+ ion was doped into the spinel materials, red or green luminescence was observed, respectively. , It should be noted that an Mn 2+ ion can be located in two different sites. , When an Mn 2+ ion is located in two cation sites, the emission spectrum has two peaks, at around 510 and 525 nm. The peak of the low-wavelength side was attributed to the tetrahedral site and the other to the octahedral site.…”

Section: Introductionmentioning

confidence: 99%

“…14,15 It should be noted that an Mn 2+ ion can be located in two different sites. 16,17 When an Mn 2+ ion is located in two cation sites, the emission spectrum has two peaks, at around 510 and 525 nm. The peak of the low-wavelength side was attributed to the tetrahedral site and the other to the octahedral site.…”

Section: ■ Introductionmentioning

confidence: 99%

“…In addition, the intensity ratios of these peaks are changed by the cation distribution. 17 This change is an example of crystal-site engineering, in which the position of the luminescent center is controlled by changing the composition of the host material or the doping concentration. 18,19 In the case of Sr approach, a rare-earth-doped phosphor emitting various colors was developed.…”

Section: ■ Introductionmentioning

confidence: 99%

“…The peak of the low-wavelength side was attributed to the tetrahedral site and the other to the octahedral site. In addition, the intensity ratios of these peaks are changed by the cation distribution …”

Section: Introductionmentioning

confidence: 99%

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Cation-Deficiency-Induced Crystal-Site Engineering for ZnGa₂O₄:Mn²⁺ Thin Film

et al. 2020

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Zn-deficient spinel-type ZnGa2O4:Mn2+ phosphor thin films were prepared using pulsed laser deposition. With an increase (decrease) in the Zn deficiency (concentration) of the films, changes in lattice constant, optical band gap, and photoluminescence spectra were observed. All films without γ-Ga2O3:Mn showed green luminescence attributable to the transition from the 4T1 state to the 6A1 state. In addition, the spectral shape changed depending on the temperature. The luminescence spectra have two peaks resulting from the Mn2+ ions located in the tetrahedral and octahedral sites. These peaks had different thermal quenching temperatures, which were around 320 and 260 K, respectively. Therefore, the spectral shape changed with increasing temperature. The spectral shape also depended on the Zn concentration. With an increase (decrease) in the Zn concentration (deficiency) of the films, the intensity of emission from Td increased in comparison with that from O h . Therefore, the position of Mn2+ was controlled by Zn deficiency similarly to the effect of crystal-site engineering.

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Section: Resultsmentioning

confidence: 99%