Optimization of Bi2O3–B2O3-based glass phosphor co-doped with Yb3+ and Nd3+ for optical coherence tomography light source

Fuchi, Shingo; Sakano, Ayako; Mizutani, Reiko; Takeda, Yoshikazu

doi:10.1007/s00340-011-4533-0

Cited by 20 publications

(10 citation statements)

References 8 publications

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“…Although many efforts have been devoted to NIR phosphors using rare-earth ions as activators, the emission spectrum is relatively narrow and does not meet the demand for a broad-band NIR pc-LED and, furthermore, this kind of research has mainly been focused on long afterglow luminescence materials. − Rare-earth ions restricted the NIR pc-LED applications due to their inherent narrow excitation and emission bands. In compared with the f–f forbidden transitions of rare-earth ions, the d–d transitions of transition-metal ions usually exhibit broad-band absorption and emission, thus showing greater potential in NIR pc-LEDs. − Recently, Wang and co-workers reported that Ni 2+ -doped ZnGa 2 O 4 showed luminescence with a spectral range from 1100 to 1700 nm and a full width at half-maximum (fwhm) value of 288 nm . Broad-band near-infrared emission (fwhm = 125 nm) has also been reported by Zhang and co-workers in Mn 2+ -doped MgAl 2 O 4 phosphors.…”

Section: Introductionmentioning

confidence: 94%

Broadband Near-Infrared Emitting Ca₂LuScGa₂Ge₂O₁₂:Cr³⁺ Phosphors: Luminescence Properties and Application in Light-Emitting Diodes

et al. 2020

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In recent years, the demand for near-infrared phosphor-converted light-emitting diodes (NIR pc-LEDs) has increased rapidly, leading to more and more attention being paid to the research of broad-band near-infrared phosphors. In this work, Cr3+-doped Ca2LuScGa2Ge2O12 (CLSGG:Cr3+) phosphors with broad-band NIR emission were prepared through traditional high-temperature solid-state reactions. The crystal structures of the phosphors were analyzed by X-ray diffraction (XRD) and Rietveld refinement. The photoluminescence excitation (PLE) spectra of the synthesized CLSGG:Cr3+ phosphors exhibit a strong absorption band in the 400–500 nm region, which matches well with a blue-light-emitting chip. The photoluminescence (PL) spectra of the phosphors show broad-band emission ranging from 650 to 1100 nm with a full width at half-maximum (fwhm) of about 150 nm. At 423 K, the integrated emission intensity of CLSGG:0.02Cr3+ is about 59% of that at room temperature. A NIR pc-LED device was fabricated by combining a mixture of as-synthesized CLSGG:0.02Cr3+ phosphor and silicone with a 460 nm blue-light-emitting chip. Under a driving current of 100 mA, the output power of the device can achieve 1.213 mW, indicating that the as-prepared phosphors are promising for NIR pc-LED applications.

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Section: Introductionmentioning

confidence: 94%

Broadband Near-Infrared Emitting Ca₂LuScGa₂Ge₂O₁₂:Cr³⁺ Phosphors: Luminescence Properties and Application in Light-Emitting Diodes

et al. 2020

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“…Some early works on broadband NIR phosphors were conducted by Fuchi et al Rare‐earth ions such as Pr 3+ , Nd 3+ , Yb 3+ , Sm 3+ , and Tm 3+ were doped in Bi 2 O 3 ‐Sb 2 O 3 ‐B 2 O 3 glasses. The glass phosphor converted LED showed an NIR emission centered at 1000 nm with 1 mW output power under 815 mA forward current.…”

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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“…We developed a technique in order to verify the authenticity of ceramic products mechanically and to enhance the dif iculty of counterfeiting genuine products, based on a concept called artifact metrics [5,6,7,8]. In our previous study [9], we focused on a transparent glass phosphor which exhibited a one-peak emission wavelength in the near infrared wavelength band by optical excitation [10,11,12,13]. Then, we proposed the idea of adding glass phosphor powder into the glaze or paint.…”

Section: Introduction a Background And Targetmentioning

confidence: 99%

Anti-copy and authenticity verification method for ceramic products: Development of new glass phosphor with two optical features

2018

J. adv. tec. eng. res.

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Multi-modal artifact metrics is an anti-counterfeiting technique, and was created based on the concept of multimodal biometrics. By this method, additives (functional materials) are added to the artifact during the manufacturing process in order to provide multiple feature information. Hence, the certainty of authenticity and dif iculty of counterfeiting could be enhanced. In order to provide two kinds of optical characteristic information (emission intensity and hue) into the artifact, we developed a new type of glass phosphor. This is a novel approach, since up-conversion phosphors with different hue and emission intensity by optical excitation at each observation point have never been reported. In this paper, we report the development of this glass phosphor, especially the production method and results of the fundamental experiments. The developed glass phosphor emitted as intended and demonstrated the validity of our approach.

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Optimization of Bi2O3–B2O3-based glass phosphor co-doped with Yb3+ and Nd3+ for optical coherence tomography light source

Cited by 20 publications

References 8 publications

Broadband Near-Infrared Emitting Ca₂LuScGa₂Ge₂O₁₂:Cr³⁺ Phosphors: Luminescence Properties and Application in Light-Emitting Diodes

Broadband Near-Infrared Emitting Ca₂LuScGa₂Ge₂O₁₂:Cr³⁺ Phosphors: Luminescence Properties and Application in Light-Emitting Diodes

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

Anti-copy and authenticity verification method for ceramic products: Development of new glass phosphor with two optical features

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Optimization of Bi2O3–B2O3-based glass phosphor co-doped with Yb3+ and Nd3+ for optical coherence tomography light source

Cited by 20 publications

References 8 publications

Broadband Near-Infrared Emitting Ca2LuScGa2Ge2O12:Cr3+ Phosphors: Luminescence Properties and Application in Light-Emitting Diodes

Broadband Near-Infrared Emitting Ca2LuScGa2Ge2O12:Cr3+ Phosphors: Luminescence Properties and Application in Light-Emitting Diodes

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

Anti-copy and authenticity verification method for ceramic products: Development of new glass phosphor with two optical features

Contact Info

Product

Resources

About

Broadband Near-Infrared Emitting Ca₂LuScGa₂Ge₂O₁₂:Cr³⁺ Phosphors: Luminescence Properties and Application in Light-Emitting Diodes

Broadband Near-Infrared Emitting Ca₂LuScGa₂Ge₂O₁₂:Cr³⁺ Phosphors: Luminescence Properties and Application in Light-Emitting Diodes

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