Stabilisation of surface and photoluminescent properties of porous silicon

Olenych, I. B.

doi:10.3116/16091833/12/2/54/2011

Cited by 16 publications

(9 citation statements)

References 12 publications

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“…The transmittance spectra were measured with an "Avatar" spectrometer in the wave number region of 400-4000 cm −1 . To identify the absorption bands of the PS and PS-GO composites, the literature data [7,[29][30][31][32] were considered.…”

Section: Methodsmentioning

confidence: 99%

Effect of Graphene Oxide on the Properties of Porous Silicon

Olenych¹,

Aksimentyeva²,

Monastyrskii³

et al. 2017

Nano Online

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We studied an effect of the graphene oxide (GO) layer on the optical and electrical properties of porous silicon (PS) in hybrid PS-GO structure created by electrochemical etching of silicon wafer and deposition of GO from water dispersion on PS. With the help of scanning electron microscopy (SEM), atomic-force microscopy (AFM), and Fourier transform infrared (FTIR) spectroscopy, it was established that GO formed a thin film on the PS surface and is partly embedded in the pores of PS. A comparative analysis of the FTIR spectra for the PS and PS-GO structures confirms the passivation of the PS surface by the GO film. This film has a sufficient transparency for excitation and emission of photoluminescence (PL). Moreover, GO modifies PL spectrum of PS, shifting the PL maximum by 25 nm towards lower energies. GO deposition on the surface of the porous silicon leads to the change in the electrical parameters of PS in AC and DC modes. By means of current-voltage characteristics (CVC) and impedance spectroscopy, it is shown that the impact of GO on electrical characteristics of PS manifests in reduced capacitance and lower internal resistance of hybrid structures.

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Section: Methodsmentioning

confidence: 99%

Effect of Graphene Oxide on the Properties of Porous Silicon

Olenych¹,

Aksimentyeva²,

Monastyrskii³

et al. 2017

Nano Online

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“…These materials are used to create electronic, optical, and sensor systems with the aim of making maximum use of size effects and large specific surface areas. Passivation of porous silicon luminescent surfaces with polymer films protects the porous silicon from mechanical and atmospheric interactions, reduces the rate of degradation, and improves the photoluminescence stability [6]. Thin film polyaniline coatings are transparent, both to exciting radiation and to the intrinsic photoluminescence.…”

mentioning

confidence: 99%

Electrochromic effect in photoluminescent porous silicon–polyaniline hybrid structures

et al. 2012

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Changes in the intensity of light transmitted through polyaniline films caused by an external voltage are used to control the photoluminescence spectrum of nanoporous silicon. A study of the optical-luminescence properties of hybrid porous silicon-polyaniline structures under the influence of an applied external potential shows that polyaniline films deposited on a porous silicon surface can serve as an optical filter for the photoluminescence of porous silicon with an electrically controlled transmission band.

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“…22 it is established that these nanostructures contain cadmium oxide and cadmium hydroxide. A similar effect was observed in the photoluminescence studies of porous silicon (PS) [25], where quantum dots and quantum wires are formed from PS nanocrystals due to surface oxidation.…”

Section: Introductionmentioning

confidence: 56%

Long-term evolution of luminescent properties in CdI2 crystals

Karbovnyk

Bolesta

Rovetskyi

et al. 2016

Low Temperature Physics

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Fresh and aged melt-grown or gas-phase grown CdI 2 crystals are studied by means of low-temperature photoluminescence spectroscopy. Noticeable transformations of emission spectra are observed after long-term aging. The formation of nanostructures containing cadmium oxide and cadmium hydroxide as well as the changes in local surrounding of iodine atoms and the possible growth of polytypic modifications of CdI 2 are taken into account when considering the diversity of optical spectra. PACS: 78.55.-m Photoluminescence, properties and materials; 78.67.-n Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures.

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Stabilisation of surface and photoluminescent properties of porous silicon

Cited by 16 publications

References 12 publications

Effect of Graphene Oxide on the Properties of Porous Silicon

Effect of Graphene Oxide on the Properties of Porous Silicon

Electrochromic effect in photoluminescent porous silicon–polyaniline hybrid structures

Long-term evolution of luminescent properties in CdI2 crystals

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