Anti-thermal-quenching in Zn1-Li Ga2O4-δ:Cr3+ phosphor for plant cultivation and optical thermometer based on defect engineering

Lu, Jiachen; Liu, Quan; Chen, Xinhe; Li, Kaiyang; Chen, Wen; Feng, Yubo; Liu, Shuo; Qian, Xu; Wei, Bo; Zhang, Le

doi:10.1016/j.ceramint.2023.03.033

Cited by 13 publications

(2 citation statements)

References 37 publications

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“…These transitions are specifically 4 A 2 -4 T 1 (4P), 4 A 2 -4 T 1 (4F), and 4 A 2 -4 T 2 (4F), 31 aligning with the PLE peaks shown in Figure 4D. Moreover, there are no absorption peaks attributable to Cr 4+ , 32 indicating that the emission near 687 nm is indeed due to the deep-red luminescence of Cr 3+ . This is consistent with the trivalent chromium spectra observed in XPS data presented in Figure 7.…”

Section: Resultssupporting

confidence: 53%

Bandgap engineering—Influence of the evolution of (Zn/Mg)Al₂O₄:Cr³⁺ spinel phosphors on the photoluminescence properties

Qiang,

Yin,

Tang

et al. 2024

J Am Ceram Soc.

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As a luminescent center ion in materials for deep red and near‐infrared light, Cr3+ has been extensively studied in octahedral host materials. In this study, using zinc aluminate (ZnAl2O4) and magnesium aluminate (MgAl2O4) spinels with abundant octahedra as substrates, a series of Zn1−xMgxAl2O4:0.5%Cr3+ (x = 0, 0.2, 0.4, 0.6, 0.8, and 1) fluorescent powders were first prepared via a high‐temperature solid‐state method. The influence of different Mg/Zn ratios on (Zn/Mg)Al2O4:0.5%Cr3+ optical properties was thoroughly explored. Experimental results show that an increase in the Mg/Zn ratio reduces the crystal field strength (Dq) and leads to distortion of the [AlO6] octahedra, resulting in broadening of the photoluminescence emission spectrum. Furthermore, the addition of Mg gradually reduces the formation of inverse spinel. An appropriate Mg/Zn ratio can improve luminescent intensity and quantum efficiency. In summary, this paper, through bandgap engineering by adjusting the Mg/Zn ratio, provides a detailed account of the changes in optical properties and the underlying mechanisms during the transition from ZnAl2O4:0.5%Cr3+ to MgAl2O4:0.5%Cr3+ spinels. It offers valuable insights for further research on the practical applications of Cr3+ in areas such as lighting displays and bioimaging.

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Section: Resultssupporting

confidence: 53%

Bandgap engineering—Influence of the evolution of (Zn/Mg)Al₂O₄:Cr³⁺ spinel phosphors on the photoluminescence properties

Qiang,

Yin,

Tang

et al. 2024

J Am Ceram Soc.

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“…In practical applications, the elevated temperature (398–423 K) generated by blue chips also imposes higher demands on thermal stability of the phosphors. 40–44 The assessment of the NAPOF:0.03Cr 3+ performance heavily relies on its exceptional thermal stability. The temperature-dependent PL spectra of NAPOF:0.03Cr 3+ were measured from 298 to 473 K (Fig.…”

Section: Resultsmentioning

confidence: 99%

A broadband near-infrared emission Na₃Al₂(PO₄)₂F₃:Cr³⁺ phosphor exhibiting zero photoluminescence quenching at 398 K

Wu,

Liang,

You

et al. 2024

J. Mater. Chem. C

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Tunable Spinel Structure Phosphors: Dynamic Change in Near‐Infrared Windows and Their Applications

Huang

Chen

Huang

et al. 2023

Advanced Optical Materials

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Applications in near‐infrared (NIR) have been explored significantly in many fields, including bioimaging, night vision, plant growth, and chemical analysis. Different emission profiles are required within the same industry. Developing luminescent materials with different tuning methods is reliable for controlling the NIR regions (NIR‐I, 700–1000 nm; NIR‐II, 1000–1700 nm). Spinel phosphors are promising candidates due to their ability to modulate the crystal field. Understanding the parameters that influence the degree of inversion in spinel compounds is crucial to harness the variability of the spinel structure. Cr3+ and Ni2+ are ideal activators for NIR‐I and NIR‐II emissions, respectively. However, there is a need for phosphors that emit in the NIR‐II region when excited by visible light. Although the energy transfer method combining two activators is considered, this review focuses on different types of spinel structures, discussing their types and common strategies to tune the host structure. The goal is to achieve desired shift and broadness of the entire NIR spectrum, highlighting the importance of spectrum tuning for practical applications.

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Anti-thermal-quenching in Zn1-Li Ga2O4-δ:Cr3+ phosphor for plant cultivation and optical thermometer based on defect engineering

Cited by 13 publications

References 37 publications

Bandgap engineering—Influence of the evolution of (Zn/Mg)Al₂O₄:Cr³⁺ spinel phosphors on the photoluminescence properties

Bandgap engineering—Influence of the evolution of (Zn/Mg)Al₂O₄:Cr³⁺ spinel phosphors on the photoluminescence properties

A broadband near-infrared emission Na₃Al₂(PO₄)₂F₃:Cr³⁺ phosphor exhibiting zero photoluminescence quenching at 398 K

Tunable Spinel Structure Phosphors: Dynamic Change in Near‐Infrared Windows and Their Applications

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Anti-thermal-quenching in Zn1-Li Ga2O4-δ:Cr3+ phosphor for plant cultivation and optical thermometer based on defect engineering

Cited by 13 publications

References 37 publications

Bandgap engineering—Influence of the evolution of (Zn/Mg)Al2O4:Cr3+ spinel phosphors on the photoluminescence properties

Bandgap engineering—Influence of the evolution of (Zn/Mg)Al2O4:Cr3+ spinel phosphors on the photoluminescence properties

A broadband near-infrared emission Na3Al2(PO4)2F3:Cr3+ phosphor exhibiting zero photoluminescence quenching at 398 K

Tunable Spinel Structure Phosphors: Dynamic Change in Near‐Infrared Windows and Their Applications

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Bandgap engineering—Influence of the evolution of (Zn/Mg)Al₂O₄:Cr³⁺ spinel phosphors on the photoluminescence properties

Bandgap engineering—Influence of the evolution of (Zn/Mg)Al₂O₄:Cr³⁺ spinel phosphors on the photoluminescence properties

A broadband near-infrared emission Na₃Al₂(PO₄)₂F₃:Cr³⁺ phosphor exhibiting zero photoluminescence quenching at 398 K