Enhanced narrow green emission and thermal stability in γ-AlON: Mn2+, Mg2+ phosphor via charge compensation

Qi-wu, Dong; Yang, Fengli; Cui, Jun; Tian, Yabin; Liu, Shuifu; Du, Fu; Jie, Peng; Ye, Xinyu

doi:10.1016/j.ceramint.2019.03.069

Cited by 32 publications

(14 citation statements)

References 33 publications

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“…For example, γ-AlON/Mn 2+ , Mg 2+ , 6 and MgAl 2 O 4 /Mn 2+ 7 exhibit fwhm values of 44 and 35 nm, respectively. Furthermore, the fwhm value of Sr 2 MgAl 22 O 36 /Mn 2+ phosphor 8 can be as low as 26 nm and that of ZnAl 2 O 4 /Mn 2+ 9 can be as low as 18 nm. Although Mn-doped phosphors achieve narrow fwhm of the green emission peak, the parity-forbidden property of low-concentration-doped Mn activators leads to relatively low absorption and long PL decay time.…”

Section: Introductionmentioning

confidence: 97%

Synthesis of Cs₃MnBr₅ Green Phosphors Using an Eco-Friendly Evaporative Crystallization Process

Park

Kim

et al. 2022

ACS Omega

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Green (G) and red (R) light-emitting materials, such as quantum dots, perovskite nanocrystals, and inorganic phosphor powders, owing to their excellent optical characteristics, have attracted researchers’ attention as color-conversion materials for lighting and display applications. However, these materials contain environmentally harmful elements, such as Pb or Cd, and/or they are synthesized using environmentally harmful synthetic approaches and conditions, involving the use of organic solvents, high pressure, high temperature, harsh atmosphere, and long reaction time. In this study, as an eco-friendly synthetic approach to synthesize lead-free Cs 3 MnBr 5 G powder phosphor, we suggest an evaporative crystallization process of aqueous reactant solution. This synthetic process does not use toxic elements or solvents and the crystallization process utilizes only low reaction temperature and short reaction time under air atmosphere conditions. We successfully synthesized Cs 3 MnBr 5 green powder phosphor, with excellent optical properties, by evaporative heating of a 200 nm syringe-filtered solution at 150 °C for 2 h. The synthesized Cs 3 MnBr 5 phosphors have a photoluminescence quantum yield of 66.3%, a peak wavelength of 520 nm, a narrow bandwidth of 38 nm, and a photoluminescence decay time of 0.34 ms under blue excitation. This phosphor is expected to be a useful alternative G-emitting material that can compete with commercial green quantum dots, perovskite nanocrystals, or inorganic phosphors.

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Section: Introductionmentioning

confidence: 97%

Synthesis of Cs₃MnBr₅ Green Phosphors Using an Eco-Friendly Evaporative Crystallization Process

Park

Kim

et al. 2022

ACS Omega

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“…Moreover, the orange emission of 596 nm suggests that the Mn 2+ luminescence center adopts octahedral coordination environment of MnO 6 . By monitoring 596‐nm emission, the Mn 2+ excitation band at around 292 nm can be observed, due to the charge transfer band (CTB) of from O 2− to Mn 2+ 36,37 . Similarly, by monitoring 758‐nm emission, the Mn 4+ exciting band at around 350 and 468 nm can be observed, due to the 4 A 2 →m 4 T 1 and 4 A 2 →a 4 T 2 transitions of Mn 4+ , 38,39 respectively.…”

Section: Resultsmentioning

confidence: 96%

“…By monitoring 596-nm emission, the Mn 2+ excitation band at around 292 nm can be observed, due to the charge transfer band (CTB) of from O 2− to Mn 2+ . 36,37 Similarly, by monitoring 758-nm emission, the Mn 4+ exciting band at around 350 and 468 nm can be observed, due to the 4 A 2 →m 4 T 1 and 4 A 2 →a 4 T 2 transitions of Mn 4+ , 38,39 respectively. It should be stressed that the luminescence intensity of Mn 2+ is much stronger than that of Mn 4+ , as shown in the contour map of luminescence spectra of BMS:0.01Mn (Figure 3B).…”

Section: Luminescent Properties Of Bms:xmnmentioning

confidence: 93%

A new optical temperature sensor based on the fluorescence intensity ratio of Mn²⁺ and Mn⁴⁺

et al. 2022

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In the course of preparing Mn-doped phosphors, the mix-valence state of Mn n+ ions may be obtained with associated interesting properties. This work prepared a new phosphor Ba 3 MgSb 2 O 9 :Mn (BMS:Mn) by a traditional high-temperature solid-state synthesis method. In this structure, Mn n+ can replace Mg 2+ site as Mn 2+ oxidation state or Sb 5+ site as Mn 4+ . Moreover, the emitting bands of Mn 2+ and Mn 4+ at around 596 and 758 nm are simultaneously observed by using 350 nm as exciting wavelength. Interestingly, the temperature-dependent emitting intensities corresponding to Mn 2+ and Mn 4+ are different at temperatures from 10 to 300 K. With increasing temperature, the intensity of Mn 2+ luminescence has some enhancement at 10-200 K and then decreases gradually, whereas Mn 4+ luminescence goes into rapid decline. By using this character, BMS:0.01Mn can be used as an optical temperature sensor at 10-300 K based on the fluorescence intensity ratio of Mn 2+ and Mn 4+ . The maximum relative sensitivity (S r ) at 125 K is as high as 1.51% K −1 .

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“…3(a), which shows that the luminescence of the sample is in the red region, and the emission spectrum data were converted to color coordinates (0.6392, 0.3605) by the calculation software “1931CIE”. To find out the color purity of the sample GAO:0.16Eu 3+ , the color purity (CP) can be calculated by the following equation: 25 where ( x , y ) denotes the color coordinates of the different samples studied, ( x i , y i ) denotes the CIE value of an equal-energy light source with coordinates (0.3333, 0.3333), and ( x d , y d ) is the chromaticity coordinate corresponding to the main wavelength of the light source, which in this experiment is ( x d , y d ) = (0.1063, 0.0945). The color purity of GAO:0.16Eu 3+ was calculated to be 95.7%.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and optical properties of Gd₄Al₂O₉:Eu³⁺, a red emitting phosphor with a strong negative thermal quenching effect

et al. 2022

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Enhanced narrow green emission and thermal stability in γ-AlON: Mn2+, Mg2+ phosphor via charge compensation

Cited by 32 publications

References 33 publications

Synthesis of Cs₃MnBr₅ Green Phosphors Using an Eco-Friendly Evaporative Crystallization Process

Synthesis of Cs₃MnBr₅ Green Phosphors Using an Eco-Friendly Evaporative Crystallization Process

A new optical temperature sensor based on the fluorescence intensity ratio of Mn²⁺ and Mn⁴⁺

Synthesis and optical properties of Gd₄Al₂O₉:Eu³⁺, a red emitting phosphor with a strong negative thermal quenching effect

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Enhanced narrow green emission and thermal stability in γ-AlON: Mn2+, Mg2+ phosphor via charge compensation

Cited by 32 publications

References 33 publications

Synthesis of Cs3MnBr5 Green Phosphors Using an Eco-Friendly Evaporative Crystallization Process

Synthesis of Cs3MnBr5 Green Phosphors Using an Eco-Friendly Evaporative Crystallization Process

A new optical temperature sensor based on the fluorescence intensity ratio of Mn2+ and Mn4+

Synthesis and optical properties of Gd4Al2O9:Eu3+, a red emitting phosphor with a strong negative thermal quenching effect

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Synthesis of Cs₃MnBr₅ Green Phosphors Using an Eco-Friendly Evaporative Crystallization Process

Synthesis of Cs₃MnBr₅ Green Phosphors Using an Eco-Friendly Evaporative Crystallization Process

A new optical temperature sensor based on the fluorescence intensity ratio of Mn²⁺ and Mn⁴⁺

Synthesis and optical properties of Gd₄Al₂O₉:Eu³⁺, a red emitting phosphor with a strong negative thermal quenching effect