The temperature dependent studies of Luminescent in nanosized SnO2 films
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Дата
2017
Науковий керівник
Укладач
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Назва журналу
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E-ISSN
Назва тому
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Анотація
Tin dioxide, widely used in various electronics industries, is not a luminophore
material, however, the luminescence of crystalline dioxide at
low temperatures is described in the literature [1]. Nanoscale forms of
this material liave recently been increasingly described as luminescent,
which expands the possibilities of its use [2].
The paper presents the results of temperature studies of the luminescence
of nanoscale tin dioxide films obtained by a sol-gel method using
polymers in the 9-300 К range.
SnOj films obtained using polymers exhibited photoluminescence at
room temperature in the orange-red region of the spectrum. Two peaks
are observed in the photoluminescence spectra: the first in the region
1.85-1.9 eV and the second in the region o f 2.32 eV. Apparently, the peak
at 647 nm (1.9 eV) is associated with oxygen vacancies in the samples
studied, and in the region of 2.32 eV with excess tin. The temperature
dependences of the peak energy, their intensity and lialf-width are considered.
The temperature dependences show a significant decrease in the luminescence
intensity of the peaks with increasing temperature. The observed
effect is explained by the temperature quenching of luminescence
as a result of nonradiative recombination. This is a consequence of the
existence of a significant density of electron states at the edges of the
forbidden band, specific for in dioxide, especially for nanoscale thin films
with a significant disruption o f long-range order.
Опис
Ключові слова
dioxide, luminophore material, temperature, luminescence of crystalline dioxide, SnOj films, peak energy
Бібліографічний опис
International reseach and practice conference: "Nanotechnology and nanomaterials" (NANO-2017), 23-26 august 2017, Chernivtsi, Ukraine : abstract book / The NAS of Ukraine, Inst. of physics [et al.] ; chairman A. G. Naumovets . – Kiev : Burlaka, 2017