Optical and electronic properties of transparent conducting Ta:TiO<sub>2</sub> thin and ultra-thin films: the effect of doping and thickness

Bricchi, Beatrice Roberta; Sygletou, Maria; Ornago, Luca; Terraneo, Giancarlo; Bisio, Francesco; Mancarella, Cristina; Stasi, Lorenzo; Rusconi, Francesco; Mogni, Erika; Ghidelli, Matteo; Biagioni, Paolo; Bassi, Andrea

doi:10.1039/d1ma00584g

Cited by 9 publications

(6 citation statements)

References 76 publications

(89 reference statements)

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“…This could be described by the fact that excessive γ-irradiation may generate too many lattice defects, such as dislocations and/or GBs acting as electron–hole recombination centers. 64 Finally, our results suggest that irradiation is a promising method for maintaining electrical conductivity type, however, its variability at various doses could be employed as a potential technique for detecting ionizing radiation.…”

Section: Resultsmentioning

confidence: 79%

Gamma-irradiated stibnite thin films set a remarkable benchmark performance for photoelectrochemical water splitting

Chihi

2024

RSC Adv.

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Section: Resultsmentioning

confidence: 79%

Gamma-irradiated stibnite thin films set a remarkable benchmark performance for photoelectrochemical water splitting

Chihi

2024

RSC Adv.

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“…Pulsed Laser Deposition (PLD) is a PVD technique where the material to be deposited is brought to the vapor state by means of a physical process, which is known as laser ablation [101][102][103]. A variety of materials and compounds can be deposited, both inorganic (metals, metal oxides, semiconductors, ceramics) and organic (polymers, biomolecules) [101,[104][105][106][107][108][109]. A high-energy pulsed laser beam hits a solid target material, which is immediately vaporized at the surface.…”

Section: Fundamentals Of Pldmentioning

confidence: 99%

Plasmonic titanium nitride nanomaterials prepared by physical vapor deposition methods

Mascaretti,

Mancarella,

Afshar

et al. 2023

Nanotechnology

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Titanium nitride (TiN) has recently emerged as an alternative to coinage metals to allow large-scale development of plasmonic applications. In this regard, its optical performance can be conveniently tuned by tailoring the process parameters of physical vapor deposition methods, such as magnetron sputtering and pulsed laser deposition. This review first introduces the fundamental features of TiN and a description on its optical properties, including insights on the main experimental techniques to measure them. Afterwards, magnetron sputtering and pulsed laser deposition are selected as fabrication techniques for TiN nanomaterials. The fundamental mechanistic aspects of both techniques are discussed in parallel with selected case studies from the recent literature, which elucidate the critical advantages of such techniques to engineer the nanostructure and the plasmonic performance of TiN.

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“…1(c In this work Raman analysis has been performed with the aim to understand the effect of gold addition on the crystalline quality of TiO2-based TCO samples. Vibrational properties of Ta-doped TiO2 have been widely investigated in the past and described elsewhere [42,43,57,66]; in particular, effective substitutional doping by Ta leads to a blue-shift of the Eg(1) peak of TiO2 anatase. The Raman spectra of Au-TCO annealed composites compared with their Au-free references are presented in Fig.…”

Section: A Morphology and Structurementioning

confidence: 99%

“…Ref. [66], and here only slightly adapted in order to fulfill the optimal fitting of transmittance curves (Fig.…”

Section: Experimental Transmittance Spectra Of Au-bottom and Au-sandw...mentioning

confidence: 99%

Tunable optical and plasmonic response of Au nanoparticles embedded in Ta-doped TiO2 transparent conducting films

Mancarella

Sygletou

Bricchi

et al. 2022

Phys. Rev. Materials

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Localised Surface Plasmon Resonances (LSPR) are fascinating optical phenomena occurring in metal nanostructures, like gold nanoparticles (Au NPs). Plasmonic excitation can be tailored efficiently in the visible range by acting on size, shape and NP surrounding, whereas carrier density is fixed, thus restricting the LSPR modulation. Transparent Conductive Oxides (TCOs), on the other hand, are gaining increasing interest for their transparency, charge carrier tunability and plasmonic features in the infrared. The combination of these two materials into a metal-TCO nanocomposite can give access to unique electrical and optical characteristics, to be tailored in view of the desired optoelectronic application. In this study Au NPs and Ta-doped TiO2 TCO films have been merged with the aim to master the Au plasmon resonance by acting on the dielectric properties of the surrounding TCO. Morphology, structure and electrical properties have been investigated as well, in order to understand the optical response of the nano-systems. The role of the embedding geometry has been explored, revealing that the largest LSPR shift (550-760 nm) occurs when the nanoparticles are sandwiched in the middle of the film, and not at the "bottom" of the film (substrate/film interface). Ta doping in the TCO has been varied (5-10% at. and bare TiO2) to induce a permittivity change of the matrix. As a result, Au LSPR is clearly blue-shifted when decreasing the dielectric permittivity at higher Ta content in the sandwich configuration. Despite the non-optimal electrical performance caused by defectivity of the films, Au-Ta:TiO2 multifunctional nanocomposites are promising candidates for their optical behavior as highly tunable plasmonic conductive metamaterials for advanced light management.

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Optical and electronic properties of transparent conducting Ta:TiO₂ thin and ultra-thin films: the effect of doping and thickness

Abstract: The development of low-dimensional transparent conducting systems is nowadays gaining interest in view of novel optoelectronic applications. In this paper, we investigate the evolution of optical and electronic properties of...

Cited by 9 publications

References 76 publications

Gamma-irradiated stibnite thin films set a remarkable benchmark performance for photoelectrochemical water splitting

Gamma-irradiated stibnite thin films set a remarkable benchmark performance for photoelectrochemical water splitting

Plasmonic titanium nitride nanomaterials prepared by physical vapor deposition methods

Tunable optical and plasmonic response of Au nanoparticles embedded in Ta-doped TiO2 transparent conducting films

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Optical and electronic properties of transparent conducting Ta:TiO2 thin and ultra-thin films: the effect of doping and thickness

Abstract: The development of low-dimensional transparent conducting systems is nowadays gaining interest in view of novel optoelectronic applications. In this paper, we investigate the evolution of optical and electronic properties of...

Cited by 9 publications

References 76 publications

Gamma-irradiated stibnite thin films set a remarkable benchmark performance for photoelectrochemical water splitting

Gamma-irradiated stibnite thin films set a remarkable benchmark performance for photoelectrochemical water splitting

Plasmonic titanium nitride nanomaterials prepared by physical vapor deposition methods

Tunable optical and plasmonic response of Au nanoparticles embedded in Ta-doped TiO2 transparent conducting films

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Product

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Optical and electronic properties of transparent conducting Ta:TiO₂ thin and ultra-thin films: the effect of doping and thickness