Photoluminescence of nanocrystalline titanium dioxide films loaded with silver nanoparticles

Preclíková, Jana; Galář, Pavel; Trojánek, F.; Rezek, Bohuslav; Němcová, Yvonne‬; Malý, P.

doi:10.1063/1.3573486

Cited by 25 publications

(9 citation statements)

References 40 publications

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“…8). These emissions indicate the radiative recombination of self-trapped excitons and the radiative transitions inside the sub-states originating from the TiO 2 surface [51]. This result is in agreement with those reported by Vishwas et al [52].…”

Section: Pl Spectrasupporting

confidence: 91%

Effects of variations in precursor concentration on the growth of rutile TiO2 nanorods on Si substrate with fabricated fast-response metal–semiconductor–metal UV detector

Selman

Hassan

2015

Optical Materials

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Section: Pl Spectrasupporting

confidence: 91%

Effects of variations in precursor concentration on the growth of rutile TiO2 nanorods on Si substrate with fabricated fast-response metal–semiconductor–metal UV detector

Selman

Hassan

2015

Optical Materials

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“…According to the authors of Refs. [16,17], the broad band in the visible region were assigned to the emission from the surface states of TiO 2 nanoparticles. Due to the large amount of surface states of nanostructured materials, the PL intensity in the visible region was much higher than that of the bulk TiO 2 .…”

Section: Resultsmentioning

confidence: 99%

Size Effect of Gold Nanoparticles on Optical and Electrical Properties of Au@TiO\(_2\) Nanocomposite Thin Films

Pham

Nguyen

et al. 2021

Comm. in Phys.

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This study focuses on the influence of gold nanoparticle sizes on optical and electrical properties of Au@TiO2 nanocomposite films. Here, the gold nanoparticles (AuNPs) of different sizes of 5 nm, 10 nm, 20 nm, 40 nm and 60 nm were dispersed onto nanoporous TiO2 thin films to form Au@TiO2 nanocomposite films. FE-SEM images and UV-vis absorption spectra show that AuNPs had good dispersion on the TiO2 films and all Au@TiO2 nanocomposite films exhibited a good surface plasmon resonance (SPR) with the resonance absorption peaks in the visible light region (about 550 nm). The effect of AuNPs on the films photoluminescence property was investigated using excited laser light of 325 nm wavelength at room temperature. The films electrical properties were studied from the change of the photocurrent under illumination of solar simulator and UV light source. The results show that the presence of gold nanoparticles has significantly improved the photocurrent of Au@TiO2 nanocomposite films and especially when AuNPs size was less than 20 nm. In addition, we also found that the photocurrent magnitude of the films with small AuNPs sizes (5 nm and 10 nm) under solar simulator light was 4 times larger than the one under UV light. These results indicate that AuNPs size had a great influence on the improvement of photocurrent in nanocomposite films.

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“…Plasmon resonance is also a useful trick to allow high‐gap semiconductors to respond in the visible region of the electromagnetic spectrum. For example, TiO 2 , known for photocatalytic applications, has the disadvantage of having the energy gap in the ultraviolet (UV) region (respectively, 3.2 and 3.0 eV for anatase and rutile [ 31 ] ). To improve and overcome the performance of TiO 2 , conventional metallic NPs have been inserted in the dielectric matrix of nanostructured TiO 2 thin films thus obtaining a metamaterial that can be used in different fields.…”

Section: Introductionmentioning

confidence: 99%

Plasmonic Light Trapping in Titania–Silver Dots Thin Films

Manno

Buccolieri

Carbone

et al. 2020

Physica Status Solidi (b)

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Metal nanoparticles (NPs) in a transparent dielectric matrix represent a very intriguing system due to the plasmonic absorption tunable in the range of visible wavelengths. Herein, the preparation and physical characterization of plasmonic titania–silver dots thin films are reported. The synthesis parameter that leads to making a TiO2 matrix in which the Ag NPs are actually incorporated is carefully analyzed and controlled. Morphological (scanning electron microscopy, transmission electron microscopy, high resolution electron microscopy), structural (selected area diffraction, X‐ray diffraction), and spectroscopic (Raman spectroscopy) characterization techniques attest that the Ag NPs are spherical and homogeneously distributed into the TiO2 dielectric matrix in the structural modification of anatase. The study of the optical properties of films concludes the work. Plasmonic resonance is analyzed according to the light scattering theory.

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Photoluminescence of nanocrystalline titanium dioxide films loaded with silver nanoparticles

Cited by 25 publications

References 40 publications

Effects of variations in precursor concentration on the growth of rutile TiO2 nanorods on Si substrate with fabricated fast-response metal–semiconductor–metal UV detector

Effects of variations in precursor concentration on the growth of rutile TiO2 nanorods on Si substrate with fabricated fast-response metal–semiconductor–metal UV detector

Size Effect of Gold Nanoparticles on Optical and Electrical Properties of Au@TiO\(_2\) Nanocomposite Thin Films

Plasmonic Light Trapping in Titania–Silver Dots Thin Films

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