A highly efficient and thermally stable broadband Cr<sup>3+</sup>-activated double borate phosphor for near-infrared light-emitting diodes

Huang, Decai; Zhu, Haomiao; Deng, Zhonghua; Yang, Hongyi; Hu, J. F.; Liang, Sisi; Chen, Dejian; Ma, En; Guo, Wang

doi:10.1039/d0tc04803h

Cited by 169 publications

(124 citation statements)

References 56 publications

Supporting

Mentioning

122

Contrasting

Unclassified

Order By: Relevance

“…ForN IR spectroscopic applications,a ni deal light source should exhibit ab road spectrum to cover more information on the functional groups. [19] Efficient emission intensity in the detection range is also required, which guarantees less noise and interference for higher detection sensitivity.H ere,e thyl alcohol and water are selected to demonstrate the potential of LIZSO:Cr 3+ in NIR spectroscopic applications.Asdisplayed in Figure 5a,t he transmission spectra measured by the UV-Vis-NIR spectrometer show characteristic absorption bands of ethyl alcohol at 908 and 1015 nm, and water at 975 nm. Figure 5b and S15 present the PL spectra of the LIZSO:Cr 3+ (y = 0, 0.30, and 0.60) phosphors after penetrating nothing, ethyl alcohol, and water.…”

Section: Resultsmentioning

confidence: 99%

Simultaneous Broadening and Enhancement of Cr³⁺Photoluminescence in LiIn₂SbO₆by Chemical Unit Cosubstitution: Night‐Vision and Near‐Infrared Spectroscopy Detection Applications

et al. 2021

View full text Add to dashboard Cite

Near‐infrared (NIR)‐emitting phosphor materials have been extensively developed for optoelectronic and biomedical applications. Although Cr3+‐activated phosphors have been widely reported, it is challenging to achieve ultra‐broad and tunable NIR emission. Here, a new ultra‐broadband NIR‐emitting LiIn2SbO6:Cr3+ phosphor with emission peak at 965 nm and a full‐width at half maximum of 217 nm is reported. Controllable emission tuning from 965 to 892 nm is achieved by chemical unit cosubstitution of [Zn2+–Zn2+] for [Li+–In3+], which can be ascribed to the upshift of 4T2g energy level due to the strengthened crystal field. Moreover, the emission is greatly enhanced, and the FWHM reaches 235 nm. The as‐prepared luminescent tunable NIR‐emitting phosphors have demonstrated the potential in night‐vision and NIR spectroscopy techniques. This work proves the feasibility of chemical unit cosubstitution strategy in emission tuning of Cr3+‐doped phosphors, which can stimulate further studies on the emission‐tunable NIR‐emitting phosphor materials.

show abstract

Section: Resultsmentioning

confidence: 99%

Simultaneous Broadening and Enhancement of Cr³⁺Photoluminescence in LiIn₂SbO₆by Chemical Unit Cosubstitution: Night‐Vision and Near‐Infrared Spectroscopy Detection Applications

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The peak position of the 4 T 2g – 4 A 2g transition redshifts from 753 to 764 nm (shift energy ≈174 cm −1 ), which could be mainly resulted from the weakened crystal field caused by the lattice expansion when the sample is heated from RT to 473 K (Figure 3b). [ 14,15,29,30 ] Correspondingly, the FWHM extends from 124 to 140 nm due to the strengthened EPC. [ 15,29,30 ] For the thermal stability of CLMSG:5%Cr 3+ (Figure 3c), the IQE manifests an unanimous thermal quenching due to the nonradiative relaxation of the 4 T 2g state.…”

Section: Resultsmentioning

confidence: 99%

Thermally Stable CaLu₂Mg₂Si₃O₁₂:Cr³⁺ Phosphors for NIR LEDs

Liu

Yuan

et al. 2021

Advanced Optical Materials

101

View full text Add to dashboard Cite

Phosphor-converted (pc) white LEDs, generally installed in smartphones, are constructed by a single commercial blue LED and green/yellow/red phosphor powders. [12,13] Based on the mature pcLED technology, broadband NIR pcLED by employing phosphors that convert blue light to broadband NIR light is developed. [14,15] Commercial blue InGaN LEDs are efficient. [16] Using a single blue LED and NIR phosphors, a blue-NIR pcLED is the best solution to meet the needs of both compact dimensions and broadband NIR radiation. [17] Since the world's first broadband blue-NIR pcLED was produced by OSRAM at the end of 2016, [18] enormous progress has been achieved in broadband NIR phosphors that can be effectively stimulated by blue light. Comprehending kinds of reported NIR phosphors, Cr 3+ is believed to be one kind of the best activators due to its tuneable broadband and efficient NIR emission. [2,14,15,[17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33] Correspondingly, the radiant power of NIR light was improved from 7-18.2 mW [25,33] to 43.1-81 mW [14,21,30,31] for the NIR pcLEDs driven at 350 mA. To achieve a high NIR radiation, the key is how to simultaneously possess a high efficiency and good thermal stability in NIR phosphors. The biggest challenge is how to discover a host that can depress the electron-phonon coupling (EPC) of Cr 3+ to the host.Garnets have been regarded as excellent hosts among lots of Cr 3+ doped NIR phosphors. Because garnets usually have a large bandgap that can depress the EPC of Cr 3+ to the host lattice. In addition a high efficiency, thus, Cr 3+ manifests high thermal stability in garnets, [27][28][29][30][31] such as the silicate garnet of Ca 3 Sc 2 Si 3 O 12 :Cr 3+ (CSSG:Cr 3+ ). [30] Herein, another silicate garnet of CaLu 2 Mg 2 Si 3 O 12 (CLMSG) that has a large bandgap (5.55 eV) is noted, [34] and Ce 3+ shows excellent luminescence in CLMSG for white LEDs. [34,35] In this work, we report the CLMSG:Cr 3+ NIR phosphor for the first time. Benefiting from the large bandgap and the weakened coupling of Cr 3+ to the CLMSG host, the optimized CLMSG:5%Cr 3+ has a characteristic of good thermal stability (≈92.1%@373 K). Correspondingly, the NIR radiation reaches 34.75 mW@100 mA for the fabricated tiny NIR pcLED.

show abstract

“…For NIR spectroscopic applications, an ideal light source should exhibit a broad spectrum to cover more information on the functional groups [19] . Efficient emission intensity in the detection range is also required, which guarantees less noise and interference for higher detection sensitivity.…”

Section: Resultsmentioning

confidence: 99%

Simultaneous Broadening and Enhancement of Cr³⁺Photoluminescence in LiIn₂SbO₆by Chemical Unit Cosubstitution: Night‐Vision and Near‐Infrared Spectroscopy Detection Applications

et al. 2021

View full text Add to dashboard Cite

show abstract

A highly efficient and thermally stable broadband Cr³⁺-activated double borate phosphor for near-infrared light-emitting diodes

Abstract: GdAl3(BO3)4:Cr3+ is used to fabricate a NIR-pc-LED that shows promise for plant lighting and applications in the nondestructive analysis of agricultural products.

Cited by 169 publications

References 56 publications

Simultaneous Broadening and Enhancement of Cr³⁺Photoluminescence in LiIn₂SbO₆by Chemical Unit Cosubstitution: Night‐Vision and Near‐Infrared Spectroscopy Detection Applications

Simultaneous Broadening and Enhancement of Cr³⁺Photoluminescence in LiIn₂SbO₆by Chemical Unit Cosubstitution: Night‐Vision and Near‐Infrared Spectroscopy Detection Applications

Thermally Stable CaLu₂Mg₂Si₃O₁₂:Cr³⁺ Phosphors for NIR LEDs

Simultaneous Broadening and Enhancement of Cr³⁺Photoluminescence in LiIn₂SbO₆by Chemical Unit Cosubstitution: Night‐Vision and Near‐Infrared Spectroscopy Detection Applications

Contact Info

Product

Resources

About

A highly efficient and thermally stable broadband Cr3+-activated double borate phosphor for near-infrared light-emitting diodes

Abstract: GdAl3(BO3)4:Cr3+ is used to fabricate a NIR-pc-LED that shows promise for plant lighting and applications in the nondestructive analysis of agricultural products.

Cited by 169 publications

References 56 publications

Simultaneous Broadening and Enhancement of Cr3+Photoluminescence in LiIn2SbO6by Chemical Unit Cosubstitution: Night‐Vision and Near‐Infrared Spectroscopy Detection Applications

Simultaneous Broadening and Enhancement of Cr3+Photoluminescence in LiIn2SbO6by Chemical Unit Cosubstitution: Night‐Vision and Near‐Infrared Spectroscopy Detection Applications

Thermally Stable CaLu2Mg2Si3O12:Cr3+ Phosphors for NIR LEDs

Simultaneous Broadening and Enhancement of Cr3+Photoluminescence in LiIn2SbO6by Chemical Unit Cosubstitution: Night‐Vision and Near‐Infrared Spectroscopy Detection Applications

Contact Info

Product

Resources

About

A highly efficient and thermally stable broadband Cr³⁺-activated double borate phosphor for near-infrared light-emitting diodes

Simultaneous Broadening and Enhancement of Cr³⁺Photoluminescence in LiIn₂SbO₆by Chemical Unit Cosubstitution: Night‐Vision and Near‐Infrared Spectroscopy Detection Applications

Simultaneous Broadening and Enhancement of Cr³⁺Photoluminescence in LiIn₂SbO₆by Chemical Unit Cosubstitution: Night‐Vision and Near‐Infrared Spectroscopy Detection Applications

Thermally Stable CaLu₂Mg₂Si₃O₁₂:Cr³⁺ Phosphors for NIR LEDs

Simultaneous Broadening and Enhancement of Cr³⁺Photoluminescence in LiIn₂SbO₆by Chemical Unit Cosubstitution: Night‐Vision and Near‐Infrared Spectroscopy Detection Applications