Photoluminescence properties of tellurite glasses doped Dy3+ and Eu3+ for the UV and blue converted WLEDs

Yu, Chengye; Yang, Zhengwen; Huang, Anjun; Chai, Zhuangzhuang; Qiu, Jianbei; Song, Zhiguo; Zhou, Dacheng

doi:10.1016/j.jnoncrysol.2016.11.025

Cited by 84 publications

(27 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This implies that the samples can be easily damaged by mechanical contact. Yu et al reported a codoped glass with Dy 3+ and Eu 3+ and tested its emission with UV and blue light as excitation source . To the best of our knowledge, doped glasses combined with PIGs have not been reported yet.…”

Section: Introductionmentioning

confidence: 99%

Eu³⁺‐doped glass as a color rendering index enhancer in phosphor‐in‐glass

et al. 2018

View full text Add to dashboard Cite

A new method for improving color rendering index (CRI) and low correlated color temperature (CCT) in high‐power white‐light‐emitting diodes (WLEDs) is proposed. We used a configuration of phosphor‐in‐glass (PIG) and studied light output changes with the increment in concentration of yellow‐emitting Y3Al5O12:Ce3+ (YAG:Ce3+) phosphor. The PIG was coupled on the top of blue‐light‐emitting diodes (LED) chip (465 nm). To compensate the lack of red emission in the phosphor, Eu3+‐doped tellurium glass with different europium content was employed as a red emitter. The suitable contents of YAG:Ce3+ and Eu3+ were 7.5 weight percent (wt%) and 3 mol percent (mol%), respectively. The CRI value went from 72 to 82, whereas the CCT was reduced from 24 933 to 6434 K. The proposed structure can improve CCT as well as CRI of WLEDs just by placing a glass on top.

show abstract

Section: Introductionmentioning

confidence: 99%

Eu³⁺‐doped glass as a color rendering index enhancer in phosphor‐in‐glass

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Recently, much attention has been focused on the photoluminescence properties of inorganic glasses doped with rare‐earth ions because of their superior inherent advantages such as high transparency, higher doping levels of rare‐earth ions, without the application of epoxy resin, and easy preparation in desirable shapes and sizes . Among the various inorganic glasses, the tellurite glasses was considered as one of the luminescence hosts for the rare‐earth ions due to their relatively low phonon energy, and the high‐efficient near‐infrared and up‐conversion luminescence were observed in the tellurite glasses doped with the rare‐earth ions . Moreover, the preparation of tellurite glasses with the low melting temperature is energy‐saving in contrast to the rare‐earth doped oxyfluoride silicate glasses.…”

Section: Introductionmentioning

confidence: 99%

“…[12][13][14][15][16][17][18] Among the various inorganic glasses, the tellurite glasses was considered as one of the luminescence hosts for the rare-earth ions due to their relatively low phonon energy, and the high-efficient nearinfrared and up-conversion luminescence were observed in the tellurite glasses doped with the rare-earth ions. 19 Moreover, the preparation of tellurite glasses with the low melting temperature is energy-saving in contrast to the rare-earth doped oxyfluoride silicate glasses. However, the tellurite glasses doped with rare-earth ions exhibited generally low luminescence efficiency because of the small absorption and emission cross sections caused by the dipole forbidden transitions of rare-earth ions.…”

Section: Introductionmentioning

confidence: 99%

Enhanced photoluminescence property and mechanism of Eu³⁺‐doped tellurite glasses by the silver and gold nanoparticles

Yang

Qiu

et al. 2017

J Am Ceram Soc

Self Cite

View full text Add to dashboard Cite

In this work, the silver or gold nanoparticle single‐existing and co‐existing tellurite glasses doped with Eu3+ were prepared, and the influence of gold or silver nanoparticles on the photoluminescence of tellurite glasses doped with Eu3+ were investigated. The photoluminescence of tellurite glasses doped with Eu3+ was enhanced by the surface plasmon absorption of gold or silver nanoparticles, and the maximum luminescence enhancement factors caused by the silver and gold nanoparticles are 4.8 and 3.5 factors, respectively. The differentiation of luminescence enhancement mechanisms caused by the gold or silver nanoparticles was demonstrated. The enhanced luminescence mechanism of the Au nanoparticle single‐existing tellurite glasses doped with Eu3+ was from the increasing of radiative decays rate caused by the Au nanoparticles. The excitation field enhancement caused by the Ag nanoparticles was responsible for the luminescence enhancement of the Ag single‐existing tellurite glasses doped with Eu3+. About 4.2‐factor luminescence enhancement was observed in the Ag and Au nanoparticle co‐existing tellurite glasses doped with Eu3+, which is attributed to the increasing of radiative decays rate and excitation field enhancement caused by the Au and Ag nanoparticles.

show abstract

“…Physical and structural investigations of tellurite glasses have been studied with different transition metal oxides TMO and rare earth oxides REO compositions [1][2][3][4][5][6][7][8][9][10]. Recently, self-cleanliness of co-doped lithium niobate tellurite glass and UV converted white light-emitting diodes (W-LEDs) have been reported [1,4].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, self-cleanliness of co-doped lithium niobate tellurite glass and UV converted white light-emitting diodes (W-LEDs) have been reported [1,4]. In Tauc's method [11,12], absorption coefficient (α) requires measurement of the absorbance, reflectance, and thickness of the film.…”

Section: Introductionmentioning

confidence: 99%

Optical and Thermal Properties of Some Tellurite Glasses

El‐Mallawany¹

2017

AJOP

View full text Add to dashboard Cite

Abstract:Tellurite glasses in the form (95-X) TEO 2 -5NB 2 O 5 -XTIO 2 , X= 5.0, 7.5, 10.0 and 12.5 mol % have been successfully prepared by the melt quenching technique. Density ρ and molar volume V have been measured. UV-Visible absorption spectra for the presented ternary tellurite glass systems have been measured in the wavelength range 200-850 nm. The optical band gap, E g , and refractive index, n, of the presented glass systems have been calculated by using the derivation absorption spectrum fitting (DASF) and absorption spectrum fitting (ASF) methods. Also, Urbach's energy, ∆E for tellurite glass systems was obtained using the absorption spectrum fitting (ASF) method. Comparison between both methods has been presented. Differential thermal analysis (DTA) for the prepared glasses with systematic heating rate 10°C/min has been carried out. The glass transition temperature, T g , onset crystallization temperature, T c , melting temperature, T m , glass stability range, S, and glass factor, K g , of the present glasses have been measured. The average cross-link density, ¯n c , number of bonds per unit volume, n b , and average stretching force constant, F¯, have been calculated.

show abstract

Photoluminescence properties of tellurite glasses doped Dy3+ and Eu3+ for the UV and blue converted WLEDs

Cited by 84 publications

References 28 publications

Eu³⁺‐doped glass as a color rendering index enhancer in phosphor‐in‐glass

Eu³⁺‐doped glass as a color rendering index enhancer in phosphor‐in‐glass

Enhanced photoluminescence property and mechanism of Eu³⁺‐doped tellurite glasses by the silver and gold nanoparticles

Optical and Thermal Properties of Some Tellurite Glasses

Contact Info

Product

Resources

About

Photoluminescence properties of tellurite glasses doped Dy3+ and Eu3+ for the UV and blue converted WLEDs

Cited by 84 publications

References 28 publications

Eu3+‐doped glass as a color rendering index enhancer in phosphor‐in‐glass

Eu3+‐doped glass as a color rendering index enhancer in phosphor‐in‐glass

Enhanced photoluminescence property and mechanism of Eu3+‐doped tellurite glasses by the silver and gold nanoparticles

Optical and Thermal Properties of Some Tellurite Glasses

Contact Info

Product

Resources

About

Eu³⁺‐doped glass as a color rendering index enhancer in phosphor‐in‐glass

Eu³⁺‐doped glass as a color rendering index enhancer in phosphor‐in‐glass

Enhanced photoluminescence property and mechanism of Eu³⁺‐doped tellurite glasses by the silver and gold nanoparticles