Optimization of Er3+-doped TiO2-thin films for infrared light up-conversion

Johannsen, Sabrina Rostgaard; Lauridsen, Lasse Rosenfeld; Julsgaard, Brian; Neuvonen, Pekka T.; Ram, Sanjay K.; Larsen, A. Nylandsted

doi:10.1016/j.tsf.2013.10.123

Cited by 18 publications

(12 citation statements)

References 26 publications

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“…The thin films were fabricated with high reproducibility, and the percentage of the different phases could in principle be controlled by varying the deposition parameters, like sputtering power or substrate temperature. From a previous study [3], polycrystalline thin films were observed for Er 3+ concentrations of 1.3 at%, however, the variation in the percentage of the different TiO 2 phases, and crystalline orientation was not that influenced by changes in the deposition parameters. Hence, our fabrication method do not allow for fabrication of the anatase and rutile phases separately.…”

Section: Methodsmentioning

confidence: 72%

“…The pressure during deposition was 0.40 Pa. However, the deposition times were modified to ensure that the thin films had approximately the same thickness [3]. The thin films were fabricated with high reproducibility, and the percentage of the different phases could in principle be controlled by varying the deposition parameters, like sputtering power or substrate temperature.…”

Section: Methodsmentioning

confidence: 99%

“…The rare-earth erbium ions (Er 3+ ) has been studied extensively as a dopant in a host matrix, predominately due to its luminescent properties around 1540 nm, which makes it suitable as a fiber amplifier for telecommunications [1,2]. In addition, due to its upconversion properties [3,4], enabling conversion of near-infrared radiation into red/green light, it has applications in a wide variety of fields like display technologies [5], photovoltaics [6,7], and medical diagnostics [8]. In order to utilize these luminescent properties of Er 3+ ions, they must be doped into appropriate hosts like fluorides, phosphates, or oxides.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of TiO_2 host crystallinity on Er^3+ light emission

Johannsen¹,

Roesgaard²,

Julsgaard³

et al. 2016

Opt. Mater. Express

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This work presents a study of the luminescence properties of Er 3+ when included into two different TiO 2 hosts: a polycrystalline and an amorphous host. The two host environments were produced by depositing two thin films with different Er 3+ concentration using radio-frequency magnetron sputtering. Structural analysis revealed the presence of the rutile and anatase phases in the polycrystalline film. Time-resolved and steadystate photoluminescence measurements evidenced the presence of two distinct local Er 3+ environments in the polycrystalline host. For the amorphous TiO 2 host, only one Er 3+ environment was observed, which differed from the two environments in the polycrystalline host. A method for extracting a fast and slow time-resolved emission spectrum from the two observed local environments in the polycrystalline host is also presented.

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Section: Methodsmentioning

confidence: 72%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of TiO_2 host crystallinity on Er^3+ light emission

Johannsen¹,

Roesgaard²,

Julsgaard³

et al. 2016

Opt. Mater. Express

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“…Indeed, the luminescence of Er 3+ ions at 1540 nm makes Er 3+ -doped TiO 2 systems suitable for optical planar waveguides, lasers, and fiber amplifiers for telecommunications [8,9,10,11]. In addition, red and green up-conversion emissions [12,13] make it a promising material for an even broader range of applications, such as photovoltaics, display technologies, medical diagnostics, and solid state lasers [14,15,16,17]. …”

Section: Introductionmentioning

confidence: 99%

Design, Synthesis, and Structure-Property Relationships of Er3+-Doped TiO2 Luminescent Particles Synthesized by Sol-Gel

et al. 2018

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Titania particles doped with various concentrations of Erbium were synthesized by the sol-gel method followed by different heat treatments. The shape and the grain growth of the particles were noticeably affected by the concentration of Erbium and the heat treatment conditions. An infrared emission at 1530 nm, as well as green and red up-conversion emissions at 550 and 670 nm, were observed under excitation at 976 nm from all of the synthesized particles. The emission spectra and lifetime values appeared to be strongly influenced by the presence of the different crystalline phases. This work presents important guidelines for the synthesis of functional Er3+-doped titania particles with controlled and tailored spectroscopic properties for photonic applications.

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“…Hydrogen is produced efficiently from aqueous methanol solution by using Pt supported TiO 2 combined with upconversion luminescence agent (Er 3+ :Y 3 Al 5 O 12 ) as the visible light photocatalysts [19,20]. Er 3+ doped TiO 2 thin films can present better response to infrared light upconversion [21]. With the assist of upconversion luminescent materials, TiO 2 solar photocatalysts were applied to degrade contaminants to purify water [22].…”

Section: Introductionmentioning

confidence: 99%

Visible Light Excited Catalysis and Reusability Performances of TiO₂@Pr:Y₂SiO₅ Upconversion Materials

Yan

Wang

Liu

et al. 2017

Journal of Nanomaterials

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To get high efficiency photodegradation on pollutants under visible light, Pr(III) doped Y2SiO5 upconversion materials and anatase TiO2 nanofilm coated Pr:Y2SiO5 composite have been prepared by using a sol-gel method. XRD and SEM test results indicated that TiO2 nanofilm was well coated on Pr:Y2SiO5 to form TiO2@Pr:Y2SiO5 composite particles with the sizes of 0.5–1.0 μm. To avoid secondary pollution resulting from incomplete recovery of catalyst particles, TiO2@Pr:Y2SiO5 was loaded on the glass fiber filters by using a dip-coating method. It is found that the catalyst particles were embedded into the carrier firmly, even after having been reused for 6 times. The luminescence intensities of TiO2@Pr:Y2SiO5 were getting down sharply with the coating contents of TiO2 increased, which was attributed to the adsorption of the luminescence by the TiO2 film in situ. As a result, TiO2@Pr:Y2SiO5 with 4% TiO2, which presented lowest luminescence intensity, showed the highest efficiency on the photodegradation of nitrobenzene wastewater. The catalysts loaded on glass fiber filters showed excellent reusability on the photodegradation of nitrobenzene and presented a photodegradation rate of 95% at the first time and up to 75.9% even after 6 times of reusing by the treatment time of 12 h.

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Optimization of Er3+-doped TiO2-thin films for infrared light up-conversion

Cited by 18 publications

References 26 publications

Influence of TiO_2 host crystallinity on Er^3+ light emission

Influence of TiO_2 host crystallinity on Er^3+ light emission

Design, Synthesis, and Structure-Property Relationships of Er3+-Doped TiO2 Luminescent Particles Synthesized by Sol-Gel

Visible Light Excited Catalysis and Reusability Performances of TiO₂@Pr:Y₂SiO₅ Upconversion Materials

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Optimization of Er3+-doped TiO2-thin films for infrared light up-conversion

Cited by 18 publications

References 26 publications

Influence of TiO_2 host crystallinity on Er^3+ light emission

Influence of TiO_2 host crystallinity on Er^3+ light emission

Design, Synthesis, and Structure-Property Relationships of Er3+-Doped TiO2 Luminescent Particles Synthesized by Sol-Gel

Visible Light Excited Catalysis and Reusability Performances of TiO2@Pr:Y2SiO5 Upconversion Materials

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Visible Light Excited Catalysis and Reusability Performances of TiO₂@Pr:Y₂SiO₅ Upconversion Materials