Sensitization of Nd3+ by 4f-5d transition of Ce3+ in Ba2Y(BO3)2Cl phosphor for the prospective NIR applications

Talewar, Rupesh A.; Mahamuda, Sk.; Rao, A.S.; Joshi, C. P.; Moharil, S. V.

doi:10.1016/j.jlumin.2018.05.035

Cited by 27 publications

(19 citation statements)

References 66 publications

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“…Theband gap of the LISO host is calculated to be 3.7 eV (Figure S8), indicating that LISO is as uitable host for Cr 3+ doping. As illustrated in Figure 2a,t he representative LIZ-SO:Cr 3+ (y = 0, 0.40, and 0.80) phosphors have excellent absorption in the ultraviolet, blue,a nd red regions that are assigned to the 4 A 2g (F) ! 4 T 1g (P), 4 A 2g (F) !…”

Section: Resultsmentioning

confidence: 99%

“…As illustrated in Figure 2a,t he representative LIZ-SO:Cr 3+ (y = 0, 0.40, and 0.80) phosphors have excellent absorption in the ultraviolet, blue,a nd red regions that are assigned to the 4 A 2g (F) ! 4 T 1g (P), 4 A 2g (F) ! 4 T 1g (F), and 4 A 2g (F) !…”

Section: Resultsmentioning

confidence: 99%

“…[3] Common rare earth activators Pr 3+ ,N d 3+ , Tm 3+ ,a nd Yb 3+ show narrow-band NIR emission accompanied by very narrow and weak absorption, restricting their applications in certain fields. [4] Recently,B i 3+ and Eu 2+activated NIR-emitting phosphors have also been explored. [1b, 5] However,t heir emission wavelengths are near the deep red region and not long enough for the NIR region.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2021

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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.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2021

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“…The glass phosphor converted LED showed an NIR emission centered at 1000 nm with 1 mW output power under 815 mA forward current. However, the efficiency of these glass phosphors was low due to f−f forbidden transition of rare‐earth ions . Transition metal Cr 3+ was a promising NIR luminescence center when it located in weak octahedral crystal field.…”

Section: Introductionmentioning

confidence: 99%

Cr³⁺‐Doped Broadband NIR Garnet Phosphor with Enhanced Luminescence and its Application in NIR Spectroscopy

Zhang

Wang

Hao

et al. 2019

Advanced Optical Materials

310

183

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Broadband near‐infrared (NIR) phosphor‐converted light emitting diode (pc‐LED) is demanded for wearable biosensing devices, but it suffers from low efficiency and low radiance. This study reports a broadband NIR Ca3‐xLuxHf2Al2+xSi1−xO12:Cr3+ garnet phosphor with emission intensity enhanced by 81.5 times. Chemical unit co‐substitution of [Lu3+−Al3+] for [Ca2+−Si4+] is responsible for the luminescence enhancement and further alters the crystal structure and electronic properties of the garnet. Using the optimized phosphor, a NIR pc‐LED with photoelectric efficiencies of 21.28%@10 mA, 15.75%@100 mA and NIR output powers of 46.09 mW@100 mA, 54.29 mW@130 mA is fabricated. The high power NIR light is observed to penetrate upper arms (≈8 cm). For application in NIR spectroscopy, the NIR pc‐LED is used as light source to measure transmission spectra of water, alcohol, and bovine hemoglobin solution. These results indicate the NIR garnet phosphor to be a promising candidate for NIR pc‐LED.

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“…Under excitation at the wavelength of 370 nm, a broad emission band extending upto 600 nm having maximum at 419 nm was observed (Figure 5A) which is due to the 5d → 2 F 5/2 , 2 F 7/2 allowed transition resulted from the coupling of 5d electron with the host lattice 33,34 . This broad emission band can be split into three different bands at 412, 449, and 526 nm by Gaussian curve fitting (Figure 5B) and these bands are resulted due to the transition from ground state to different field‐splitting 5d levels of Ce 3+ ions 30,24,35 .…”

Section: Resultsmentioning

confidence: 96%

Photoluminescence studies of Ce³⁺ ion‐doped BiPO₄ phosphor and its photocatalytic activity

Naorem

Singh

2020

Int J Applied Ceramic Tech

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Ce 3+ ion doped BiPO 4 phosphors were synthesized by co-precipitation method using ethylene glycol as capping agent. The prepared phosphors were characterized by XRD, SEM, FT-IR, UV-Vis, and PL spectroscopy techniques. The formation of monoclinic phase was confirmed from XRD and FT-IR studies. SEM study revealed the rice shape morphology of BiPO 4 :Ce 3+ (7at.%). In the photoluminescence analysis, a broad emission band extending in a wide wavelengths range with maxima around 419 and 470 nm was observed under excitation at 370 and 417 nm, respectively. These emission bands are originated from the electronic transitions, viz., 5d → 2 F 5/2 , 2 F 7/2 of Ce 3+ ion. The emission intensity was accentuated with the increase of Ce 3+ ion till 7at.% and subsequently attenuated with further increase of Ce 3+ ion concentration; which is due to the concentration quenching effect. The BiPO 4 :Ce 3+ (7at.%) sample was characterized for the feasibility of photocatalytic degradation of methylene blue under UV light irradiation and degradation of 90% of the dye was degraded within 120 minutes was observed. From the results, it is believed that the prepared BiPO 4 :Ce 3+ may have potential applications in solid state lighting as well as in photocatalysis for the degradation of organic dyes.

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Sensitization of Nd3+ by 4f-5d transition of Ce3+ in Ba2Y(BO3)2Cl phosphor for the prospective NIR applications

Cited by 27 publications

References 66 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

Cr³⁺‐Doped Broadband NIR Garnet Phosphor with Enhanced Luminescence and its Application in NIR Spectroscopy

Photoluminescence studies of Ce³⁺ ion‐doped BiPO₄ phosphor and its photocatalytic activity

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Sensitization of Nd3+ by 4f-5d transition of Ce3+ in Ba2Y(BO3)2Cl phosphor for the prospective NIR applications

Cited by 27 publications

References 66 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

Cr3+‐Doped Broadband NIR Garnet Phosphor with Enhanced Luminescence and its Application in NIR Spectroscopy

Photoluminescence studies of Ce3+ ion‐doped BiPO4 phosphor and its photocatalytic activity

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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

Cr³⁺‐Doped Broadband NIR Garnet Phosphor with Enhanced Luminescence and its Application in NIR Spectroscopy

Photoluminescence studies of Ce³⁺ ion‐doped BiPO₄ phosphor and its photocatalytic activity