Regulation of red to near-infrared emission in Mn<sup>2+</sup> single doped magnesium zinc phosphate solid-solution phosphors by modification of the crystal field

Y., Y.; Hu, Jieqi; Song, Enhai; Ye, Shi; Zhang, Q. Y.

doi:10.1039/c5tc03116h

Cited by 26 publications

(18 citation statements)

References 30 publications

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“…Herein, a dual-wavelength (530/650 nm) emitting material, Li 2 ZnSiO 4 :Mn 2+ , is produced by controlling the doping concentration of Mn 2+ , wherein the two emission bands have different concentration- and temperature-dependent luminescence behaviour, but exhibit quite similar excitation spectra. Although dual-emission characteristics have also been observed in two Mn 2+ -doped crystallographic sites in some cases, the two emission bands always show distinct excitation spectra in these systems 33 – 36 . Additionally, rational control of the site preference of the dopant is difficult in these cases.…”

Section: Introductionmentioning

confidence: 96%

Mn2+-activated dual-wavelength emitting materials toward wearable optical fibre temperature sensor

et al. 2022

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Photothermal sensing is crucial for the creation of smart wearable devices. However, the discovery of luminescent materials with suitable dual-wavelength emissions is a great challenge for the construction of stable wearable optical fibre temperature sensors. Benefiting from the Mn2+-Mn2+ superexchange interactions, a dual-wavelength (530/650 nm)-emitting material Li2ZnSiO4:Mn2+ is presented via simple increasing the Mn2+ concentration, wherein the two emission bands have different temperature-dependent emission behaviours, but exhibit quite similar excitation spectra. Density functional theory calculations, coupled with extended X-ray absorption fine structure and electron-diffraction analyses reveal the origins of the two emission bands in this material. A wearable optical temperature sensor is fabricated by incorporating Li2ZnSiO4:Mn2+ in stretchable elastomer-based optical fibres, which can provide thermal-sensitive emissions at dual- wavelengths for stable ratiometric temperature sensing with good precision and repeatability. More importantly, a wearable mask integrated with this stretchable fibre sensor is demonstrated for the detection of physiological thermal changes, showing great potential for use as a wearable health monitor. This study also provides a framework for creating transition-metal-activated luminescence materials.

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Section: Introductionmentioning

confidence: 96%

Mn2+-activated dual-wavelength emitting materials toward wearable optical fibre temperature sensor

et al. 2022

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“…On the other hand, because of the specific driving forces of Mn 2+ precipitation and site‐preference in a given host lattice, the practical realization of dual‐ or multiband emission from Mn 2+ ions is rather difficult. Even though dual‐band emission from Mn 2+ ions has been realized in some systems, the two emission bands possess distinct excitation spectra, thus, practical application remains limited …”

Section: Introductionmentioning

confidence: 99%

Wavelength‐Tunability and Multiband Emission from Single‐Site Mn²⁺ Doped CaO Through Antiferromagnetic Coupling and Tailored Superexchange Reactions

Song

Wang

et al. 2017

Advanced Optical Materials

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In modern phosphor materials, in contrast to single‐band emission, simultaneous photoluminescence through two or more emission bands enables broad and tailorable emission color, but requires fine control of activator precipitation on specific crystallographic sites. This presents a major obstacle in the design of tunable emitters, since dedicated control of site occupancy is rarely possible. Here, a new paradigm of tunability is considered, which overcomes this limitation. It is demonstrated in CaO:Mn2+ that single‐ and dual‐band emission can be generated by involving only a single type of crystallographic sites. This enables tailoring of the emission color alone through dopant concentration. The two emission bands exhibit different spectral, dynamic, and thermal characteristics, but very similar excitation spectra. While the variations in thermal quenching provide a tool for tunability, the variations in decay behavior suggest interesting potential for lifetime‐multiplexing and coding. Energy transfer is observed between the two emission bands, using time‐resolved emission spectra. From the analysis of crystal structure, spectral data, electron paramagnetic resonance analyses, and density functional theory calculations analyses, it is found that the emission bands at ≈600 and 660 nm originate from isolated Mn2+ ions and superexchange reactions in Mn2+ Mn2+ dimers, respectively.

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“…93 Ma et al reported that a series of novel red-to NIR-emitting Mn 2+ -activated (Mg 1−x Zn x ) 2.97 (PO 4 ) 2 (x = 0, 0.2, 0.4, 0.5, 0.6, and 0.8). 94 The fiveand six-coordinated structure for Mn 2+ enables the generation of NIR emission (peaking at 730 nm, lower energy) and red emission (peaking at 630 nm, higher energy). The main reason is that Mn 2+ ions are distributed at distinct crystal field environments with a different coordination.…”

Section: High-throughput Calculation and Crystal Structure Design To ...mentioning

confidence: 99%

“…(c) Normalized photoluminescence emission spectra of Li 2 Zn 1– x Mg x Ge 3 O 8 :3%Mn 2+ (0 ≤ x ≤ 0.9) . (d) Normalized photoluminescence emission spectra of (Mg 1– x Zn x ) 2.97 (PO 4 ) 2 :0.03Mn 2+ ( x = 0–0.8) under 417 nm excitation . Part b was reproduced with permissions from ref .…”

Section: High-throughput Calculation and Crystal Structure Design To ...mentioning

confidence: 99%

Advances in Near-Infrared Luminescent Materials without Cr³⁺: Crystal Structure Design, Luminescence Properties, and Applications

et al. 2021

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Near-infrared (NIR) luminescent materials are attracting much attention as the promising applications in food composition analysis, night vision, biosensors, and so on. Besides Cr3+ ions, other ions such as Eu2+, Ce3+, and Bi3+, etc. recently also exhibit remarkable broadband NIR light emission in inorganic hosts. The key issues are to optimize their photoluminescence quantum yield and reveal an unclear “structure-luminescence” relationship. Herein, photoluminescence properties of NIR luminescent materials without Cr3+ are systematically summarized. Importantly, we propose a significant influence of local crystal structure on NIR luminescence properties. These strategies contain (i) ligand covalency, (ii) strong crystal field and distorted lattice, (iii) selective sites occupation, and (iv) mixed valences and doping level control. The proposed “structure-luminescence” relationship can provide a new insight into exploit NIR luminescent materials and optimize current luminescent materials. Furthermore, the concept of “high-throughput DFT prediction-crystal structure design-photoluminescence performances optimization” is summarized to swiftly develop targeted NIR luminescent materials. Subsequently, energy transfer strategies and application prospects are summarized in detail. This review discusses the relationship between crystal structure and NIR light emission based on a high-throughput method. The proposed concept can offer a guidance to exploit a series of novel NIR luminescent materials and clarify underlying luminescence mechanisms.

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Regulation of red to near-infrared emission in Mn²⁺ single doped magnesium zinc phosphate solid-solution phosphors by modification of the crystal field

Abstract: The different Mg/Zn ratios of (Mg1−xZnx)2.97(PO4)2:0.03Mn2+ result in various PL intensities and spectra profiles, which are related to the crystal field strength and local environment of the Mn2+ ions.

Cited by 26 publications

References 30 publications

Mn2+-activated dual-wavelength emitting materials toward wearable optical fibre temperature sensor

Mn2+-activated dual-wavelength emitting materials toward wearable optical fibre temperature sensor

Wavelength‐Tunability and Multiband Emission from Single‐Site Mn²⁺ Doped CaO Through Antiferromagnetic Coupling and Tailored Superexchange Reactions

Advances in Near-Infrared Luminescent Materials without Cr³⁺: Crystal Structure Design, Luminescence Properties, and Applications

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Regulation of red to near-infrared emission in Mn2+ single doped magnesium zinc phosphate solid-solution phosphors by modification of the crystal field

Abstract: The different Mg/Zn ratios of (Mg1−xZnx)2.97(PO4)2:0.03Mn2+ result in various PL intensities and spectra profiles, which are related to the crystal field strength and local environment of the Mn2+ ions.

Cited by 26 publications

References 30 publications

Mn2+-activated dual-wavelength emitting materials toward wearable optical fibre temperature sensor

Mn2+-activated dual-wavelength emitting materials toward wearable optical fibre temperature sensor

Wavelength‐Tunability and Multiband Emission from Single‐Site Mn2+ Doped CaO Through Antiferromagnetic Coupling and Tailored Superexchange Reactions

Advances in Near-Infrared Luminescent Materials without Cr3+: Crystal Structure Design, Luminescence Properties, and Applications

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Regulation of red to near-infrared emission in Mn²⁺ single doped magnesium zinc phosphate solid-solution phosphors by modification of the crystal field

Wavelength‐Tunability and Multiband Emission from Single‐Site Mn²⁺ Doped CaO Through Antiferromagnetic Coupling and Tailored Superexchange Reactions

Advances in Near-Infrared Luminescent Materials without Cr³⁺: Crystal Structure Design, Luminescence Properties, and Applications