Performance of Erbium-doped TiO2 thin film grown by physical vapor deposition technique

Lahiri, Rini; Ghosh, Anupam; Dwivedi, Shyam Murli Manohar Dhar; Chakrabartty, Shubhro; Chinnamuthu, P.; Mondal, Aniruddha

doi:10.1007/s00339-017-1180-2

Cited by 19 publications

(8 citation statements)

References 41 publications

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“…Additionally, as previously reported in other studies, the bandgap was shown to be improved upon Er doping concentrations. 42 This increased bandgap energy implies an upshift in the conduction band of TiO 2 due to the substitution of Er 3+ ions for the Ti 3+ traps, comparable to the work reported by Rini Lahiri et al , 60 where Er-ion doping demonstrated a trap-assisted Moss–Burstein (M–B) effect. With this approach, the Er-ions could produce traps at the conduction band edge of TiO 2 , resulting in a blue shift in the conduction band that employs bandgap enlargement.…”

Section: Resultssupporting

confidence: 80%

“…The (E g + F g ) peak at 345 cm −1 revealed the Er–O bond associated with Er 2 O 3 . 60 Additionally, it is observed that the Raman peak intensity increased with RE-ion dopants, indicating non-stoichiometry defects that improve photo absorption. 61 Er 0.003 Nd 0.001 Ti 0.996 O 2 exhibited more intense Raman peaks, suggesting superior absorption.…”

Section: Resultsmentioning

confidence: 99%

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Defect engineered (Er³⁺/Nd³⁺) codoped TiO₂ photoanodes for enhanced photoelectrochemical and photovoltaic applications

Katta

Velpandian

Subrahmanyam

et al. 2022

Sustainable Energy Fuels

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Section: Resultssupporting

confidence: 80%

Section: Resultsmentioning

confidence: 99%

Defect engineered (Er³⁺/Nd³⁺) codoped TiO₂ photoanodes for enhanced photoelectrochemical and photovoltaic applications

Katta

Velpandian

Subrahmanyam

et al. 2022

Sustainable Energy Fuels

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“…The deposition process is carried out in the furnace that is connected with a vacuum pump. The catalyst on the substrate, temperature, and pressure during the material fabrication affect the morphology of the obtained structures [5,32,36]. This is an effective method to obtain metal oxide nanowires, nanorods, nanoneedles, etc.…”

Section: Metal Oxide Nanostructures Growth and Fabrication Methodsmentioning

confidence: 99%

Metal Oxide Nanostructures in Food Applications: Quality Control and Packaging

et al. 2018

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Metal oxide materials have been applied in different fields due to their excellent functional properties. Metal oxides nanostructuration, preparation with the various morphologies, and their coupling with other structures enhance the unique properties of the materials and open new perspectives for their application in the food industry. Chemical gas sensors that are based on semiconducting metal oxide materials can detect the presence of toxins and volatile organic compounds that are produced in food products due to their spoilage and hazardous processes that may take place during the food aging and transportation. Metal oxide nanomaterials can be used in food processing, packaging, and the preservation industry as well. Moreover, the metal oxide-based nanocomposite structures can provide many advantageous features to the final food packaging material, such as antimicrobial activity, enzyme immobilization, oxygen scavenging, mechanical strength, increasing the stability and the shelf life of food, and securing the food against humidity, temperature, and other physiological factors. In this paper, we review the most recent achievements on the synthesis of metal oxide-based nanostructures and their applications in food quality monitoring and active and intelligent packaging.

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“…The additional multisite vibrational modes were identified as RE−O bonds, where the (E g + F g ) peak at 345 cm −1 confirmed Er 2 O 3 of the Er−O bond. 53 Moreover, the RE-dopants increased the Raman peak intensity, as nonstoichiometric defects would improve absorption abilities. 53 Er 0.003 Nd 0.004 Ti 0.993 O 2 showed a strong Raman peak at 142 cm −1 , hoping for better photonics applications.…”

Section: Structural Propertiesmentioning

confidence: 99%

Tunable Broadband NIR PL Emissions with (Nd³⁺/Er³⁺) Codoped TiO₂ via Synergetic Energy Transfer

Katta

Biswas

Raavi

2022

ACS Appl. Opt. Mater.

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Tunable photoluminescence (PL) emissions in the near-infrared (NIR) region are the most advantageous qualities that benefit NIR light-dependent applications such as thermosensing, biosensing, solar cells, LED, bioimaging technologies, etc. Rare-earth trivalent (+3) doping is essential for the NIR light sources due to their unique transitions. Especially, multi-rare-earth doping is being highlighted for the effect of generating broad-band emissions. This work presents a concept of tunable NIR PL emission via codoping of (Er/Nd) into TiO2 at varied excitation wavelengths and stoichiometry ratios. We discovered the synergetic energy transfer (ET) mechanism among the Er3+ and Nd3+ energy states, which led to tuning the PL emissions over the NIR region to the mid-IR region. A broad-band PL emission from 850 to 1700 nm at an indirect excitation wavelength of 360 nm confirms the energy transfer (ET) occurring from TiO2 (host) to the lanthanide of Er3+ and Nd3+ (guests). In addition, the direct excitation (visible) excitation-dependent PL emission and their associated electron decay lifetime suggest the possibility of ET between Er3+ and Nd3+, which is evidenced by high energy transfer efficiency (ETE), whereas the ETE from Er3+ to Nd3+ is calculated to be 46% measured at the high intense PL emission of (1532 nm, Er: 4 F 13 / 2 .25em to .25em I 15 / 2 ) under the excitation of 528 nm. These results are consistent with the enhanced QY values up to 90% for the (Er/Nd) codoped TiO2 compared to the single Er-doped TiO2. Similarly, ETE from Nd to Er is almost 48% attained at the emission of (1068 nm, Nd: 4 F 3 / 2 .25em to .25em 4 I 11 / 2 ) under 588 nm excitation and their changes in the QY values indicate the ET occurrence from Nd3+ to Er3+. Thus, it is hypothesized that the PL investigations support the synergetic ET between Nd3+ and Er3+ is responsible for the tunable PL emissions.

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Performance of Erbium-doped TiO2 thin film grown by physical vapor deposition technique

Cited by 19 publications

References 41 publications

Defect engineered (Er³⁺/Nd³⁺) codoped TiO₂ photoanodes for enhanced photoelectrochemical and photovoltaic applications

Defect engineered (Er³⁺/Nd³⁺) codoped TiO₂ photoanodes for enhanced photoelectrochemical and photovoltaic applications

Metal Oxide Nanostructures in Food Applications: Quality Control and Packaging

Tunable Broadband NIR PL Emissions with (Nd³⁺/Er³⁺) Codoped TiO₂ via Synergetic Energy Transfer

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Performance of Erbium-doped TiO2 thin film grown by physical vapor deposition technique

Cited by 19 publications

References 41 publications

Defect engineered (Er3+/Nd3+) codoped TiO2 photoanodes for enhanced photoelectrochemical and photovoltaic applications

Defect engineered (Er3+/Nd3+) codoped TiO2 photoanodes for enhanced photoelectrochemical and photovoltaic applications

Metal Oxide Nanostructures in Food Applications: Quality Control and Packaging

Tunable Broadband NIR PL Emissions with (Nd3+/Er3+) Codoped TiO2 via Synergetic Energy Transfer

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Product

Resources

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Defect engineered (Er³⁺/Nd³⁺) codoped TiO₂ photoanodes for enhanced photoelectrochemical and photovoltaic applications

Defect engineered (Er³⁺/Nd³⁺) codoped TiO₂ photoanodes for enhanced photoelectrochemical and photovoltaic applications

Tunable Broadband NIR PL Emissions with (Nd³⁺/Er³⁺) Codoped TiO₂ via Synergetic Energy Transfer