Influence of hydrogenation on the structure and visible photoluminescence of germanium oxide thin films

Ardyanian, M.; Rinnert, H.; Vergnat, M.

doi:10.1016/j.jlumin.2009.02.013

Cited by 29 publications

(30 citation statements)

References 21 publications

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“…The broad PL band at 800 nm was observed earlier from GeO x films [10]. Ardyanian et al have interpreted origin of this band to optical transitions conditioned by with O deficiency related defects or oxygen dangling bonds [10]. Some shift of this band in our case can be caused by a little difference in GeO x stoichiometry of the studied film, compared with the films studied earlier [10].…”

supporting

confidence: 69%

“…Ardyanian et al have interpreted origin of this band to optical transitions conditioned by with O deficiency related defects or oxygen dangling bonds [10]. Some shift of this band in our case can be caused by a little difference in GeO x stoichiometry of the studied film, compared with the films studied earlier [10]. It is known that optical gap of sub stoichiometric oxides strongly depends on stoichiometry.…”

supporting

confidence: 51%

“…One can see broad peak with the maximum at 680 nm from rela tively thick (100 nm) GeO x film. The broad PL band at 800 nm was observed earlier from GeO x films [10]. Ardyanian et al have interpreted origin of this band to optical transitions conditioned by with O deficiency related defects or oxygen dangling bonds [10].…”

mentioning

confidence: 71%

“…It is known that defects play important role in photoluminescence of dielectrics. Different groups have investigated point defects in ger manium dioxide [9] and germanium suboxide [10]. Photoluminescence intensity of dielectric films is defined by the competition between a radiative process and nonradiative relaxation of photoexcitations [11].…”

mentioning

confidence: 99%

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Anomalous temperature dependence of photoluminescence in GeO x films and GeO x /SiO2 nano-heterostructures

Marin¹,

Володин²,

Rinnert³

et al. 2012

Jetp Lett.

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supporting

confidence: 69%

supporting

confidence: 51%

mentioning

confidence: 71%

mentioning

confidence: 99%

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Anomalous temperature dependence of photoluminescence in GeO x films and GeO x /SiO2 nano-heterostructures

Marin¹,

Володин²,

Rinnert³

et al. 2012

Jetp Lett.

Self Cite

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“…The observed blue shift on PL of GeO 2 nanostructures have two reasons: one is decreasing the size of nanoparticles that increased the difference between of electronic states on molecules. Second reason is high amount of oxygen on product [23]. By decreasing particle size were increased the surface area and increased the surface oxidation.…”

Section: Resultsmentioning

confidence: 99%

Facile synthesis of GeO2 nanostructures and measurement of photocatalytic, photovoltaic and photoluminescence properties

Nejaty-Moghadam

Esmaeili-Bafghi-Karimabad

Gholamrezaei

et al. 2015

J Mater Sci: Mater Electron

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In this work, germanium dioxide nanostructures were prepared by a facile co-precipitation method. In this synthesis approach was used from acetyl acetone as capping agent to get the smallest nanoparticles. Some of effective parameters were optimized to achieve the best morphology of product, such as mole ratio of acetyl acetone, temperature and time. Small germania nanostructures with a size about 70 nm sizes were achieved in this method. Nanostructures were characterized using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Fourier transform infrared techniques X-ray energy dispersive spectroscopy and ultraviolet spectroscopy (UV-Vis). Various properties such as photoluminescence, photocatalytic and photovoltaic property were studied for as-prepared nanostructures. Results of germania nanostructures show that product revealed a PL band that caused from recombination of electron and hole in nanostructure. On the other hand, these nanostructures show a good photocatalytic behavior for degradation of methyl orange in presence of UV light. Therefore germania nanoparticles applied in photovoltaic measurement.

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Synthesis of Silicon and Germanium Oxide Nanostructures via Photonic Curing; a Facile Approach to Scale Up Fabrication

Khatoon,

Subedi,

Chrisey

2024

ChemistryOpen

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Silicon and Germanium oxide (SiOx and GeOx) nanostructures are promising materials for energy storage applications due to their potentially high energy density, large lithiation capacity (~10X carbon), low toxicity, low cost, and high thermal stability. This work reports a unique approach to achieving controlled synthesis of SiOx and GeOx nanostructures via photonic curing. Unlike conventional methods like rapid thermal annealing, quenching during pulsed photonic curing occurs rapidly (sub‐millisecond), allowing the trapping of metastable states to form unique phases and nanostructures. We explored the possible underlying mechanism of photonic curing by incorporating laws of photophysics, photochemistry, and simulated temperature profile of thin film. The results show that photonic curing of spray coated 0.1 M molarity Si and Ge Acetyl Acetate precursor solution, at total fluence 80 J cm−2 can yield GeOx and SiOx nanostructures. The as‐synthesized nanostructures are ester functionalized due to photoinitiated chemical reactions in thin film during photonic curing. Results also showed that nanoparticle size changes from ~48 nm to ~11 nm if overall fluence is increased by increasing the number of pulses. These results are an important contribution towards large‐scale synthesis of the Ge and Si oxide nanostructured materials which is necessary for next‐generation energy storage devices.

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Influence of hydrogenation on the structure and visible photoluminescence of germanium oxide thin films

Cited by 29 publications

References 21 publications

Anomalous temperature dependence of photoluminescence in GeO x films and GeO x /SiO2 nano-heterostructures

Anomalous temperature dependence of photoluminescence in GeO x films and GeO x /SiO2 nano-heterostructures

Facile synthesis of GeO2 nanostructures and measurement of photocatalytic, photovoltaic and photoluminescence properties

Synthesis of Silicon and Germanium Oxide Nanostructures via Photonic Curing; a Facile Approach to Scale Up Fabrication

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