Dy3+ doped calcium boroaluminate glasses and Blue Led for smart white light generation

Lodi, Thiago A.; Dantas, N.F.; Gonçalves, T. S.; Camargo, Andréa Simone Stucchi de; Pedrochi, F.; Steimacher, A.

doi:10.1016/j.jlumin.2018.11.045

Cited by 42 publications

(16 citation statements)

References 36 publications

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“…For the radiative transition of Dy 3+ , it is worth noting that the hypersensitivity of the 4 F 9/2 → 6 H 13/2 transition (yellow emission) can induce different Y/B ratios and consequently different values in the color coordinates 36 . The Y/B values of the 0.5Dy‐KNN‐xBSN ceramics before and after illumination are shown in Figure 6E.…”

Section: Resultsmentioning

confidence: 99%

Smart white lighting and multi‐mode optical modulations via photochromism in Dy‐doped KNN‐based transparent ceramics

Lin

Wang

et al. 2020

J. Am. Ceram. Soc.

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Compared to common incandescent and fluorescent lamps, solid-state lighting (SSL) has gained tremendous attention owing to their high luminous efficiency, high brightness, low power consumption and long lifetime. 1-4 Lightemitting diodes (LEDs) in SSL sources exhibit widespread applications in backlighting displays, data communications, medical devices, barcode scanners, and signals. 5,6 White light is commonly obtained by the excitation of either ultraviolet (UV) or blue emitting LED chips that encapsulate phosphors in an epoxy resin. However, phosphors coated on the chips are easily deteriorated due to heating, contacting with organic solvents or re-absorption of blue light, reducing the quality of emitted light. 7,8 Meanwhile, phosphors own lower thermal conductivity and higher surface energy than that of bulk counterparts, partly reducing the emission efficiency and lifetime of LEDs. Therefore, it is of great interest to develop bulk materials with the advantages of simple packaging, good thermal stability, and high efficiency of heat conduction for LEDs. Nonetheless, frequently studied bulk luminescent materials are concentrated in glass-ceramics, such as Y 3 Al 5 O 12 (YAG) and the derivatives. 9-11 To expand the functionalities in LEDs, especially WLEDs, it is of significance to explore novel luminescent bulks.

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Section: Resultsmentioning

confidence: 99%

Smart white lighting and multi‐mode optical modulations via photochromism in Dy‐doped KNN‐based transparent ceramics

Lin

Wang

et al. 2020

J. Am. Ceram. Soc.

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“…32 Moreover, Dy 3+ shows 4 F 9/2 → 6 H 15/2 and 4 F 9/2 → 6 H 13/2 transitions in the visible region that are influential for a yellow/blue emission and ideal white light generation. 40,44,76 Table 1 demonstrates various studies for efficient white light generations exploiting RE ions. Figure 1 shows various The REOs have promising prospects in an efficient white light generation.…”

Section: Reos' Optical Applications and Prospectsmentioning

confidence: 99%

“…41 The Dy 2 O 3 blended trialkali oxyfluoroborate (NKLB-Dy), lithium lead gadolinium silicate (LPDy), Li 2 O-BaO-GdF 3 −SiO 2 (LGFDy), LiF-CaO-Bi 2 O 3 −B 2 O 3 , and calcium boroaluminate (CaBAl) glasses have a higher yellowto-blue ratio indicating the covalent character of the Dy−O bond, making them potential candidates for laser and white light generation applications. 33,43,44,80,81 The 0.5 mol % Dy 2 O 3doped lithium borate glasses have the maximum emission intensity under UV irradiation (i.e., 350 nm) also signifying their practicality in manufacturing contemporary bright white LED bulbs. 45 Furthermore, 2 mol % Eu 2 O 3 with 5 mol % Dy 2 O 3 -doped CaWO 4 is also a suitable candidate for white light emission.…”

Section: Reos' Optical Applications and Prospectsmentioning

confidence: 99%

A Review on Optical Applications, Prospects, and Challenges of Rare-Earth Oxides

Hossain

Ahmed

et al. 2021

ACS Appl. Electron. Mater.

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In small- and large-scale industries, manipulable optical characteristics are desired. In this regard, rare-earth oxides (REOs) have been providing pragmatic attributes in terms of successful implementations and promising prospects throughout the last few decades. Currently, there is no comprehensive literature review on REOs that can aid researchers in focusing on industry-relevant emerging materials. Therefore, this review reports studies that have been able to experimentally utilize the physical, chemical, thermal, electronic, spectroscopic, and photocatalytic properties of REOs in the optical field. The brief and focused review finds that the most pronounced applications of REOs in the optical field are in white light and laser, while the prospective ground likely lies in optoelectronics, fiber optic applications, and miscellaneous repertoires that incorporate an innovative utilization of an electronic configuration of REOs. From the perspective of this review, the versatility of an REO in the optical field has become prominent and quantified by the successful implementations of REOs in white light and nonwhite light applications. Furthermore, the innovative applications of REOs include but are not limited to the development of solid-state optical devices, optoelectronic systems, and photocatalytic agents. Specifically, their futuristic applications are likely to be led by the development of stronger emission devices and the obtaining of flexible doping characteristics by several ions such as Li+, Eu3+, Dy3+, Nd3+, La3+, Yb3+, etc. at different levels, which will render the pathway for further exploration in this regard. However, the improvement in terms of methodological attributes requires a serious consideration of overcoming the limitation of thermal stability, lack of exploration of several types of lights, photodarkening in critical applications, lack of applicability at a wide range of temperatures, and so on. From an industrial perspective, it can be conjectured from the reported literature that the challenges will be overcome at a large scale within a few years due to the expedited technological advancements of the experimental repertoires, rendering the REO applications in the optical field reasonably economic and commercially viable. In short, this is the first review that objectively considers the applications and prospects of REOs, which will essentially invoke several studies to investigate the specific properties and viability of REOs in the optical field.

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“…On the other hand, rare earth (RE) ions, which possess 4f → 4f transition with narrow and strong band emission, have been widely used to gain abundant emission colors . Among RE ions, Tm 3+ has attracted much attention recently because it provides blue luminescence with appropriate lifetime and color‐rendering properties . It is well known that yellow and blue lights in appropriate proportions could generate white light .…”

Section: Introductionmentioning

confidence: 99%

“…Among RE ions, Tm 3+ has attracted much attention recently because it provides blue luminescence with appropriate lifetime and color‐rendering properties . It is well known that yellow and blue lights in appropriate proportions could generate white light . Considering that the efficient white luminescence significantly depends on the yellow‐to‐blue intensity ratio, white light is expected to be generated by adjusting the heat treatment condition, pumping source and RE ion doping content, which are the key factors that affect the yellow emission from ZnO as well as blue emission of Tm 3+ ions.…”

Section: Introductionmentioning

confidence: 99%

Color‐tunable and white emission of Tm³⁺ doped transparent zinc silicate glass‐ceramics embedding ZnO nanocrystals

et al. 2019

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Tm3+ doped zinc silicate glass‐ceramics composed of SiO2‐Al2O3‐ZnO‐K2O‐Tm2O3 embedded with ZnO nanocrystals were successfully fabricated by melt‐quenching method with subsequent heat treatment. Tm3+ ions and ZnO nanocrystals were introduced as blue and yellow luminescence centers, respectively. The effects of heat treatment, excitation wavelength and Tm3+ doping concentration on the photoluminescence behaviors of these glass‐ceramics were studied. Short‐time (5 minutes) heat treatment was considered as the optimal heat treatment time, which facilitates simultaneously emitting narrow blue peak located at 453 nm and a broad yellow band centered at 580 nm. Blue and yellow emissions could be attributed to the 1D2 → 3F4 transition of Tm3+ and Zni/Oi‐related defect emission of ZnO nanocrystals, respectively. The combination of these two emissions allows the realization of white light emitting in the glass‐ceramic samples. Furthermore, tunable luminescent color and chromaticity coordinates, including yellow, white and blue, can be realized by varying the pumping wavelengths as well as the content of Tm3+ dopant in the glass matrix. Nearly perfect white light emission with Commission Internationale de l'Eclairage coordinate (x = 0.33, y = 0.32) was achieved for the 0.05 mol% Tm3+ doped glass‐ceramic embedding ZnO nanocrystals by heat treatment at 750°C for 5 minutes under the excitation of 360 nm. These luminescent glass‐ceramics doped with Tm3+ ion and ZnO nanocrystals could be a promising candidate for white light emitting devices under near‐ultraviolet excitation.

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Dy3+ doped calcium boroaluminate glasses and Blue Led for smart white light generation

Cited by 42 publications

References 36 publications

Smart white lighting and multi‐mode optical modulations via photochromism in Dy‐doped KNN‐based transparent ceramics

Smart white lighting and multi‐mode optical modulations via photochromism in Dy‐doped KNN‐based transparent ceramics

A Review on Optical Applications, Prospects, and Challenges of Rare-Earth Oxides

Color‐tunable and white emission of Tm³⁺ doped transparent zinc silicate glass‐ceramics embedding ZnO nanocrystals

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Dy3+ doped calcium boroaluminate glasses and Blue Led for smart white light generation

Cited by 42 publications

References 36 publications

Smart white lighting and multi‐mode optical modulations via photochromism in Dy‐doped KNN‐based transparent ceramics

Smart white lighting and multi‐mode optical modulations via photochromism in Dy‐doped KNN‐based transparent ceramics

A Review on Optical Applications, Prospects, and Challenges of Rare-Earth Oxides

Color‐tunable and white emission of Tm3+ doped transparent zinc silicate glass‐ceramics embedding ZnO nanocrystals

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Product

Resources

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Color‐tunable and white emission of Tm³⁺ doped transparent zinc silicate glass‐ceramics embedding ZnO nanocrystals