Efficient Cr3+-activated NaInP2O7 phosphor for broadband near-infrared LED applications

Wang, Qi; Wang, Shangwei; Tan, Tao; Wang, Jiutian; Pang, Ran; Li, Da; Li, Chengyu; Zhang, Hongjie

doi:10.1039/d2qi00794k

Cited by 21 publications

(21 citation statements)

References 47 publications

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“…The photoluminescence excitation and emission spectra of these compounds are plotted in Figure b,c, respectively. The excitation spectra present two intense bands with peaks located in blue and red regions, which can be assigned to 4 A 2 ( 4 F) → 4 T 1 ( 4 F) and 4 A 2 ( 4 F) → 4 T 2 ( 4 F) transitions of Cr 3+ , respectively . Upon 450 nm excitation, a broadband NIR emission covering 700–1100 nm with emission peaks ranging from 730 to 830 nm can be observed in this family.…”

Section: Resultsmentioning

confidence: 87%

“…The excitation spectra present two intense bands with peaks located in blue and red regions, which can be assigned to 4 A 2 ( 4 F) → 4 T 1 ( 4 F) and 4 A 2 ( 4 F) → 4 T 2 ( 4 F) transitions of Cr 3+ , respectively. 42 Upon 450 nm excitation, a broadband NIR emission covering 700−1100 nm with emission peaks ranging from 730 to 830 nm can be observed in this family. Comparing the relative emission peak intensity (Figure 1d) indicates that the Y 3 In 1.94 Cr 0.06 Ga 3 O 12 has the highest emission intensity in this family.…”

Section: Computationmentioning

confidence: 89%

“…= 0.615 Å) substituting larger In 3+ (r 6-coor. = 0.80 Å) in the crystal structure of Y 3 In 2 Ga 3 O 12 (Figure 2c), 42,43 suggesting that the Cr 3+ ion was successfully introduced into the octahedral site without generating any impurity or significant structural variations.…”

Section: Crystal Structure and Morphologymentioning

confidence: 99%

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Highly Efficient Broadband Near-Infrared Luminescence with Zero-Thermal-Quenching in Garnet Y₃In₂Ga₃O₁₂:Cr³⁺ Phosphors

Zhong

2022

Chem. Mater.

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Broadband near-infrared (NIR) light source based on phosphor-converted light-emitting-diode (pc-LED) is crucial for applications in medical diagnosis, food quality analysis, and night vision fields, motivating the development of highly efficient and thermal robust NIR phosphor materials. Herein, a novel Cr 3+ -doped garnet phosphor Y 3 In 2 Ga 3 O 12 :Cr 3+ emerges from a fundamental study of the Ln 3 In 2 Ga 3 O 12 (Ln = La, Gd, Y, and Lu) family. Upon 450 nm excitation, this material presents a broadband NIR emission covering 650−1100 nm with a peak located at 760 nm and a full width at half maximum of 125 nm. This material also possesses an ultrahigh internal quantum efficiency (IQE = 91.6%) and absorption efficiency (AE = 46.6%), resulting in an external quantum efficiency as high as 42.7%. Moreover, the emission intensity of this material at 150 °C maintains 100% of the initial intensity, showing a rare zero-thermalquenching property. Fabricating an NIR pc-LED device by using this material, an excellent NIR output power of 68.4 mW with a photoelectric efficiency of 15.9% under 150 mA driving current can be obtained, which exhibits much better performance than the devices fabricated by using some reported efficient NIR materials. Therefore, this work not only provides an ultraefficient and thermally robust broadband NIR material for spectroscopy application but also contributes to the foundation of design rules of NIR materials with high performance.

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Section: Resultsmentioning

confidence: 87%

Section: Computationmentioning

confidence: 89%

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Highly Efficient Broadband Near-Infrared Luminescence with Zero-Thermal-Quenching in Garnet Y₃In₂Ga₃O₁₂:Cr³⁺ Phosphors

Zhong

2022

Chem. Mater.

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“…There is no apparent absorption from the visible to the NIR for the undoped CLSAS. The optical band gap of the CLSAS host can be calculated according to the Kubelka–Munk equation: [ 32,33 ]

\begin{array}{*{20}{c}}{F\left( R \right) = \frac{{{{\left( {1 - R} \right)}^2}}}{{2R}}}\end{array}

\begin{array}{*{20}{c}}{{{\left[ {F\left( R \right) \times h\nu } \right]}^2} = c\left( {h\nu - {E_{\rm{g}}}} \right)}\end{array}

…”

Section: Resultsmentioning

confidence: 99%

“…There is no apparent absorption from the visible to the NIR for the undoped CLSAS. The optical band gap of the CLSAS host can be calculated according to the Kubelka-Munk equation: [32,33] 1 2…”

Section: Pl Properties Of Clsas:cr 3+mentioning

confidence: 99%

Broadband NIR Phosphor Ca₂LuScAl₂Si₂O₁₂:Cr³⁺ for NIR LED Applications

Jin

Zhou

Ran

et al. 2022

Advanced Optical Materials

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Currently, NIR analysis and detection are mainly concentrated on large-scale equipment, which is not conducive to daily use. In order to achieve the practicability and convenience of optical-electronic products, smart NIR light sources have been proposed for intelligent devices, especial the smart phone, to detect the freshness and safety of food. [7] It is essential to find a new NIR light source with high efficiency and broadband emission for these applications. Compared with the traditional NIR light source (i.e., tungsten halide lamps and laser diodes), the NIR phosphorconverted light-emitting diodes (pc-LEDs) are prepared by combining broadband NIR phosphors and blue LED chips, which have the advantages of smaller size and longer life. [8,9] Therefore, developing a broadband NIR phosphor that can be effectively excited by the blue light is the top priority for many applications.Activators excited by the blue light in NIR phosphors are mainly rare-earth and transition metal ions. Eu 2+ is a candidate, which shows broad NIR light with a peak at 740 nm and a full width at half maximum (FWHM) of 160 nm in K 3 LuSi 2 O 7 , while the intensity at 150 °C is only 59% of that at room temperature. [10] In addition to the lower thermal stability, NIR emission from rare-earth ion single-doped phosphors are often to obtain high efficiency. [11,12] On the contrary, the NIR phosphor doped with transition metal ions is easy to obtain broadband emission with good thermal stability. Cr 3+ is one of transition metal ions with 3d 3 electronic configuration, and the shell does not shield the three valence electrons. The spatial expansion of the d-electron wavefunction will be strongly interacted by the crystal field and lattice vibrations. Therefore, the Cr 3+ ions are very sensitive to the crystal field, which can be exploited to obtain NIR phosphors with high thermal stability and broadband emission by changing the crystal field environment. [13] Furthermore, the d-d transition of Cr 3+ ions usually shows a vast emission peak and absorption peak, and there is a significant absorption in the blue light. Thus, NIR phosphors doped with Cr 3+ ions have been studied widely. [14][15][16][17][18] Cr 3+ often occupies octahedrons or tetrahedrons sites in germanate NIR phosphors with wide FWHM. [19][20][21] Although the NIR phosphor based on germanate has a comprehensive emission spectrum, the low quantum Near-infrared phosphor-converted light-emitting diodes (NIR pc-LEDs) have promising applications in food analysis, night vision imaging, and biological probes. Developing NIR phosphors with broadband emission and high efficiency has attracted immense interest. Herein, a novel NIR phosphor Ca 2 LuScAl 2 Si 2 O 12 :Cr 3+ (CLSAS:Cr 3+ ) is reported for the first time. Under the excitation of 442 nm light, CLSAS:Cr 3+ shows broadband emission from 600 to 900 nm with a full width at half maximum (FWHM) of 142 nm, benefiting from the emissions of two Cr 3+ centers in CLSAS, which is proved by the spectra and the decay curves. The internal q...

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Broadband and Multimode Near‐Infrared Emitter Based on Cr³⁺‐Activated Stannate for Multifunctional Applications

Zhou

Song

et al. 2023

Advanced Optical Materials

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Efficient Cr³⁺-activated NaInP₂O₇ phosphor for broadband near-infrared LED applications

Abstract: Recently, Cr3+-activated phosphors have garnered attention for broadband near-infrared phosphor converted light-emitting diodes (NIR pc-LEDs) applications, but usually display low efficiency. Herein, we designed and synthesized a novel efficient broadband NIR...

Cited by 21 publications

References 47 publications

Highly Efficient Broadband Near-Infrared Luminescence with Zero-Thermal-Quenching in Garnet Y₃In₂Ga₃O₁₂:Cr³⁺ Phosphors

Highly Efficient Broadband Near-Infrared Luminescence with Zero-Thermal-Quenching in Garnet Y₃In₂Ga₃O₁₂:Cr³⁺ Phosphors

Broadband NIR Phosphor Ca₂LuScAl₂Si₂O₁₂:Cr³⁺ for NIR LED Applications

Broadband and Multimode Near‐Infrared Emitter Based on Cr³⁺‐Activated Stannate for Multifunctional Applications

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Efficient Cr3+-activated NaInP2O7 phosphor for broadband near-infrared LED applications

Abstract: Recently, Cr3+-activated phosphors have garnered attention for broadband near-infrared phosphor converted light-emitting diodes (NIR pc-LEDs) applications, but usually display low efficiency. Herein, we designed and synthesized a novel efficient broadband NIR...

Cited by 21 publications

References 47 publications

Highly Efficient Broadband Near-Infrared Luminescence with Zero-Thermal-Quenching in Garnet Y3In2Ga3O12:Cr3+ Phosphors

Highly Efficient Broadband Near-Infrared Luminescence with Zero-Thermal-Quenching in Garnet Y3In2Ga3O12:Cr3+ Phosphors

Broadband NIR Phosphor Ca2LuScAl2Si2O12:Cr3+ for NIR LED Applications

Broadband and Multimode Near‐Infrared Emitter Based on Cr3+‐Activated Stannate for Multifunctional Applications

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Efficient Cr³⁺-activated NaInP₂O₇ phosphor for broadband near-infrared LED applications

Highly Efficient Broadband Near-Infrared Luminescence with Zero-Thermal-Quenching in Garnet Y₃In₂Ga₃O₁₂:Cr³⁺ Phosphors

Highly Efficient Broadband Near-Infrared Luminescence with Zero-Thermal-Quenching in Garnet Y₃In₂Ga₃O₁₂:Cr³⁺ Phosphors

Broadband NIR Phosphor Ca₂LuScAl₂Si₂O₁₂:Cr³⁺ for NIR LED Applications

Broadband and Multimode Near‐Infrared Emitter Based on Cr³⁺‐Activated Stannate for Multifunctional Applications