Oxide phosphors for efficient light upconversion: Yb3+ and Er3+ co-doped Ln2BaZnO5 (Ln = Y, Gd)

Etchart, Isabelle; Huignard, Arnaud; Bérard, Mathieu; Nordin, Muhammad Noor; Hernández, Ignacio Colomer; Curry, Richard J.; Gillin, W. P.; Cheetham, Anthony K.

doi:10.1039/c000127a

Cited by 112 publications

(77 citation statements)

References 36 publications

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“…This can be explained by the appearance of concentration quenching, as has been observed in previous studies. 35 The inset of Figure 3 shows the evolution of the green (545 nm) to near-infrared (760 nm) emission intensity ratios for the same seven samples. For Yb 3+ concentrations above ~3%, the green to near-infrared ratio is seen to be constant with the Yb 3+ concentration.…”

Section: Concentration Dependence Of Uc Efficienciesmentioning

confidence: 99%

“…Recently, the upconversion properties of Y 2 BaZnO 5 :Yb 3+ ,Er 3+ and Gd 2 BaZnO 5 :Yb 3+ ,Er 3+ under 980 nm continuous and pulsed excitation were investigated and bright green and red emissions observed. 34,35 In the present work, we focus on the investigation of Yb 3+ ,Ho 3+ co-doped Y 2 BaZnO 5 for infrared to visible upconversion. We show that, by optimizing dopant concentrations, bright green upconversion luminescence can be achieved, with a relatively high efficiency of up to 2.6%.…”

Section: Introductionmentioning

confidence: 99%

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Efficient oxide phosphors for light upconversion; green emission from Yb³⁺and Ho³⁺co-doped Ln₂BaZnO₅(Ln = Y, Gd)

et al. 2011

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The optical properties of Yb 3+ and Ho 3+ co-doped Y 2 BaZnO 5 , synthesized by solid-state reactions, are investigated in detail. Under 977 nm excitation (~2.5 W/cm 2 ), bright green upconversion emission is observed. Concentration dependence studies at room temperature show that relatively high infrared to visible upconversion efficiencies are obtained with values up to ~2.6%. The results of power dependence studies and temperature dependent lifetime measurements allow us to determine the dominant upconversion mechanisms in Yb 3+ : Ho 3+ co-doped Y 2 BaZnO 5 oxides. The materials presented in this paper constitute new and efficient upconversion phosphors which may find utility in a variety of applications.

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Section: Concentration Dependence Of Uc Efficienciesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Efficient oxide phosphors for light upconversion; green emission from Yb³⁺and Ho³⁺co-doped Ln₂BaZnO₅(Ln = Y, Gd)

et al. 2011

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“…A maximum upconversion efficiency of 0.086 6 0.003% (420-530 nm emission range) was obtained in Y 2 BaZnO 5 : Yb 3þ (6%), Tm 3þ (0.25%) at room temperature under $ 2.5 W/cm 2 excitation. This opens up the possibility of combining the present Yb 3þ , Tm 3þ co-doped material with our Yb 3þ , Er 3þ (red plus green) phosphor 24 in order to produce white light. We shall explore this possibility in a future publication.…”

Section: Discussionmentioning

confidence: 99%

“…Recently, the upconversion properties of Ln 2 BaZnO 5 : Yb 3þ , Er 3þ and Ln 2 BaZnO 5 : Yb 3þ , Ho 3þ (Ln ¼ Y, Gd) under 980 nm continuous and pulsed excitation were investigated and efficient visible emissions observed in the red and the green. [23][24][25] In the present work, we focus on the investigation of Yb 3þ , Tm 3þ co-doped Y 2 BaZnO 5 materials for infrared to infrared and blue upconversion. Luminescence mechanisms are elucidated through power dependence studies and lifetime measurements on samples with different dopant concentrations.…”

Section: Introductionmentioning

confidence: 99%

Oxide phosphors for light upconversion; Yb3+ and Tm3+ co-doped Y2BaZnO5

Etchart

Hernández

Huignard

et al. 2011

Journal of Applied Physics

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The optical properties of Yb 3þ and Tm 3þ co-doped Y 2 BaZnO 5 , synthesized by solid-state reaction, are investigated in detail. Three main emission bands centered around 479 nm (blue), 654 nm (red), and 796 nm (near-infrared) are observed under near-infrared laser excitation via an upconversion process. Detailed studies of the upconversion properties as a function of dopant concentrations are described and upconversion efficiencies quantified precisely. Maximum efficiencies of $ 1.53% in the 730-870 nm near-infrared emission range and of $ 0.09% in the 420-530 nm blue range are obtained. The results of power dependence studies and concentration dependent lifetime measurements are presented. This in-depth spectroscopic study allows us, for the first time, to identify the dominant processes involved in the upconversion mechanism of Yb 3þ , Tm 3þ co-doped Y 2 BaZnO 5 oxides.

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“…[27][28][29] Oxide materials are usually chemically, mechanically, and thermally stable, and therefore can be promising hosts for light UC applications. [27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45] For these purposes, Er doped many oxide hosts UC materials have been designed and prepared, such as ZnO, 27 43 and NaNbO 3 44 have been studied. However, these types of pervoskite oxides have chemical and physical stability but low emission efficiency due to their low solubility of trivalent rare earth ions.…”

Section: Introductionmentioning

confidence: 99%

Upconversion luminescence, ferroelectrics and piezoelectrics of Er Doped SrBi4Ti4O15

Peng

Zou

et al. 2012

AIP Advances

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Er3+ doped SrBi4Ti4O15 (SBT) bismuth layered-structure ferroelectric ceramics were synthesized by the traditional solid-state method, and their upconversion photoluminescent (UC) properties were investigated as a function of Er3+ concentration and incident pump power. Green (555 nm) and red (670 nm) emission bands were obtained under 980 nm excitation at room temperature, which corresponded to the radiative transitions from 4S3/2, and 4F9/2 to 4I15/2, respectively. The emission color of the samples could be changed with moderating the doping concentrations. The dependence of UC intensity on pumping power indicated a two-photon emission process. Studies on dielectric properties indicated that the introduction of Er increased the ferroelectric-paraelectric phase transition temperature (Tc) of SBT, thus making this ceramic suitable for piezoelectric sensor applications at higher temperatures. Piezoelectric measurement showed that the doped SBT had a relative higher piezoelectric constant d33 compared with the non-doped ceramics. The thermal annealing behaviors of the doped sample revealed a stable piezoelectric property. The doped SBT showed bright UC emission while simultaneously having increased Tc and d33. As a multifunctional material, Er doped SBT ferroelectric oxide showed great potential in application of sensor, future optical-electro integration and coupling devices

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Oxide phosphors for efficient light upconversion: Yb3+ and Er3+ co-doped Ln2BaZnO5 (Ln = Y, Gd)

Cited by 112 publications

References 36 publications

Efficient oxide phosphors for light upconversion; green emission from Yb³⁺and Ho³⁺co-doped Ln₂BaZnO₅(Ln = Y, Gd)

Efficient oxide phosphors for light upconversion; green emission from Yb³⁺and Ho³⁺co-doped Ln₂BaZnO₅(Ln = Y, Gd)

Oxide phosphors for light upconversion; Yb3+ and Tm3+ co-doped Y2BaZnO5

Upconversion luminescence, ferroelectrics and piezoelectrics of Er Doped SrBi4Ti4O15

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Oxide phosphors for efficient light upconversion: Yb3+ and Er3+ co-doped Ln2BaZnO5 (Ln = Y, Gd)

Cited by 112 publications

References 36 publications

Efficient oxide phosphors for light upconversion; green emission from Yb3+and Ho3+co-doped Ln2BaZnO5(Ln = Y, Gd)

Efficient oxide phosphors for light upconversion; green emission from Yb3+and Ho3+co-doped Ln2BaZnO5(Ln = Y, Gd)

Oxide phosphors for light upconversion; Yb3+ and Tm3+ co-doped Y2BaZnO5

Upconversion luminescence, ferroelectrics and piezoelectrics of Er Doped SrBi4Ti4O15

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Efficient oxide phosphors for light upconversion; green emission from Yb³⁺and Ho³⁺co-doped Ln₂BaZnO₅(Ln = Y, Gd)

Efficient oxide phosphors for light upconversion; green emission from Yb³⁺and Ho³⁺co-doped Ln₂BaZnO₅(Ln = Y, Gd)