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Title | Photoluminescence of high optical quality CdSe thin films deposited by close-spaced vacuum sublimation |
Authors |
Hnatenko, Yurii Pavlovych
Bukivskyi, Petro Mykolaiovych Faryna, Ivan Oleksandrovych Opanasiuk, Anatolii Serhiiovych Ivashchenko, Maksym Mykolaiovych |
ORCID |
http://orcid.org/0000-0002-8173-3948 http://orcid.org/0000-0002-1888-3935 http://orcid.org/0000-0002-4611-0956 |
Keywords |
II–VI films Low-temperature photoluminescence Residual impurity states Point defects Optical quality |
Type | Article |
Date of Issue | 2013 |
URI | http://essuir.sumdu.edu.ua/handle/123456789/33847 |
Publisher | ElsevierB.V. |
License | |
Citation | |
Abstract |
Polycrystalline CdSe thin films (d¼0.1–3.0 μm) have been deposited on a glass substrate by means of the
close-spaced vacuum sublimation technique. X-ray diffraction measurements have shown that the films
obtained at Тs4473 K have only wurtzite phase. The influence of deposition conditions, in particular, the
substrate temperature on the photoluminescence (PL) of CdSe films spectra was investigated. This let us
study the effect of glass substrate on their optical quality as well as determine the nature and energy
structure of the intrinsic defects and residual impurities in the films. The presence in PL spectrum of
the most intense sharp donor bound exciton D0
X-line for CdSe films obtained at Ts¼873 K indicates the
n-type conductivity and their high optical quality. Intensive PL bands in the spectral range 1.65–1.74 eV
were also observed, which are associated with the recombination of donor–acceptor pairs with the
participation of the shallow donor and acceptor centers caused by Na(Li) residual impurities. As a result
of the study of the PL spectra of CdSe films the optimal temperature conditions of their growth were
determined, namely, the substrate temperature T 873 K and the evaporator temperature T 973 K.
When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/33847 |
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J_Luminescence_2014.pdf | 611.63 kB | Adobe PDF | 1481128319 |
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