Some optical properties of silver peroxide (AgO) and silver oxide (Ag2O) films produced by chemical-bath deposition

Varkey, A.J.; Fort, Ada

doi:10.1016/0927-0248(93)90040-a

Cited by 114 publications

(67 citation statements)

References 14 publications

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“…Extrapolation of the linear portion of the plots of ( ℎ]) 2 versus photon energy to = 0 resulted in the optical band gap of the films. The optical band gap of the films increased from 2.05 to 2.13 eV with the increase of substrate temperature from 303 to 373 K. Further it decreased to 1.92 eV at substrate temperature of 423 K. Varkey and Fort [19] reported an optical band gap of 2.25 eV in Ag 2 O films produced by chemical bath deposition.…”

Section: Resultsmentioning

confidence: 93%

“…The phase transformation from Ag 2 O to Ag was also confirmed by the X-ray diffraction. Varkey and Fort [19] reported that the Ag 2 O and AgO films formed on glass substrates by chemical bath deposition showed the electrical resistivity of 0.5 Ω cm and 0.12 Ω cm, respectively. Ravi Chandra Raju et al [18] reported that the electrical resistivity increased from 1 × 10 −2 to 4 × 10 2 Ω cm with the increase of oxygen partial pressure from 9 to 50 Pa in pulsed laser deposited silver oxide films.…”

Section: Resultsmentioning

confidence: 99%

“…Thin films of silver oxide can be prepared by various techniques such as thermal oxidation of silver films [5], thermal evaporation [15,16], electron beam evaporation [17], pulsed laser deposition [18], chemical vapour deposition [19], electrodeposition [20], DC sputtering [8,10,[21][22][23][24][25], and RF sputtering [7,11,26,27]. Among these deposition techniques, RF magnetron sputtering is one of the promising techniques for preparation of Ag 2 O films because of the advantages of high deposition rates, uniformity on large area 2 ISRN Optics substrates, precise control on the chemical composition and physical properties.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of Silver Oxide Films Formed by Reactive RF Sputtering at Different Substrate Temperatures

Reddy

Pierson

et al. 2014

ISRN Optics

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Silver oxide (A 2 O) films were deposited on glass and silicon substrates held at temperatures in the range 303-473 K by reactive RF magnetron sputtering of silver target. The films formed at room temperature were single phase Ag 2 O with polycrystalline in nature, while those deposited at 373 K were improved in the crystallinity. The films deposited at 423 K were mixed phase of Ag 2 O and Ag. Atomic force micrographs of the films formed at room temperature were of spherical shape grains with size of 85 nm, whereas those deposited at 473 K were with enhanced grain size of 215 nm with pyramidal shape. Electrical resistivity of the single phase films formed at room temperature was 5.2 × 10 −3 Ωcm and that of mixed phase was 4.2 × 10 −4 Ωcm. Optical band gap of single phase films increased from 2.05 to 2.13 eV with the increase of substrate temperature from 303 to 373 K, while in mixed phase films it was 1.92 eV.

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Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Characterization of Silver Oxide Films Formed by Reactive RF Sputtering at Different Substrate Temperatures

Reddy

Pierson

et al. 2014

ISRN Optics

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“…1A). This electrically discolored region shows optical and x-ray photoelectron spectroscopic signatures characteristic of AgO films, (20,26,27) but remains an excellent conductor except at the site of electroluminescence. The increased resistivity and resulting electroluminescence do not arise in AgO films that are only heated in an oven without application of high currents.…”

mentioning

confidence: 99%

“…Three types of silver oxide samples were used in our studies (20,26), ranging in thickness from 15 to 80 nm. Initially conductive and nonelectroluminescent, all silver oxide films were activated by passing ϳ1 A (at ϳ5 V) through the film for several seconds at room temperature, resulting in a dramatic increase in resistance from ϳ5 ⍀ to ϳ10 6 ⍀.…”

mentioning

confidence: 99%

Strongly enhanced field-dependent single-molecule electroluminescence

Lee

González

Dickson

2002

Proc. Natl. Acad. Sci. U.S.A.

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Individual, strongly electroluminescent Agn molecules (n ‫؍‬ 2ϳ8 atoms) have been electrically written within otherwise nonemissive silver oxide films. Exhibiting characteristic single-molecule behavior, these individual room-temperature molecules exhibit extreme electroluminescence enhancements (>10 4 vs. bulk and dc excitation on a per molecule basis) when excited with specific ac frequencies. Occurring through field extraction of electrons with subsequent reinjection and radiative recombination, single-molecule electroluminescence is enhanced by a general mechanism that avoids slow bulk material response. Thus, while we detail strong electroluminescence from single, highly fluorescent Agn molecules, this mechanism also yields strong ac-excited electroluminescence from similarly prepared, but otherwise nonemissive, individual Cu nanoclusters.

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Effect of nanoparticle shape on the conductivity of Ag nanoparticle poly(vinyl alcohol) composite films

Sirohi

Mittal

Nain

et al. 2019

Polymer International

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In this work, the shape effect of silver nanoparticles (AgNPs) on photocatalysis and electrical conductivity was investigated. Different shapes of AgNPs achieved using various concentrations of NaBH 4 were characterized using particle size analysis, UV-visible spectroscopy and high-resolution transmission electron microscopy. The colours of colloidal solutions were found to be influenced by the shape of the nanoparticles. Yellow and blue AgNPs were spherical and triangular in shape, respectively, whereas distorted spherical particles showed a red colour and the presence of both particles in one solution resulted in a green colloidal solution. The AgNPs were used to prepare Ag/poly(vinyl alcohol) (PVA) composite films and their electrical conductivity was investigated. Owing to their better charge carrier generation, uniform distribution in the PVA matrix and enhanced surface plasmon resonance, blue AgNPs (triangular shaped) exhibited superior conductivity performance compared to the other nanoparticles. The values for maximum conductivity for the blue and yellow AgNPs were 3.45 × 10 −4 −1 cm −1 and 2.67 × 10 −4 −1 cm −1 respectively.

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Some optical properties of silver peroxide (AgO) and silver oxide (Ag2O) films produced by chemical-bath deposition

Cited by 114 publications

References 14 publications

Characterization of Silver Oxide Films Formed by Reactive RF Sputtering at Different Substrate Temperatures

Characterization of Silver Oxide Films Formed by Reactive RF Sputtering at Different Substrate Temperatures

Strongly enhanced field-dependent single-molecule electroluminescence

Effect of nanoparticle shape on the conductivity of Ag nanoparticle poly(vinyl alcohol) composite films

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