Study of the Structural and Optical Properties of Dy Doped CdS Thin Films Deposited by Close-spaced Vacuum SublimationCdSDy

Автор(ы) Yu.P. Gnatenko1, Yu.S. Yeromenko2, D.I. Kurbatov2, P.M. Bukivskij1, M.S. Furier1, A.P. Bukivskii1, A.S. Opanasyuk2
Принадлежность

1Institute of Physics of National Academy of Sciences of Ukraine, 46, Nauki Prosp., 03028 Kyiv, Ukraine

2Sumy State University, 2, Rymskyi-Korsakov Str., 4007 Sumy, Ukraine

Е-mail yuriygnatenko@ukr.net
Выпуск Том 10, Год 2018, Номер 5
Даты Получено 26.08.2018; в отредактированной форме 20.10.2018; опубликовано online 29.10.2018
Ссылка Yu.P. Gnatenko, Yu.S. Yeromenko, D.I. Kurbatov, et al., J. Nano- Electron. Phys. 10 No 5, 05001 (2018)
DOI https://doi.org/10.21272/jnep.10(5).05001
PACS Number(s) 85.60.Bt, 73.61.Ga
Ключевые слова Semiconductor thin films, Structural properties (9) , Low-temperature photoluminescence, Intrinsic defects.
Аннотация

In this work we deposited CdS:Dy thin films using a close-spaced vacuum sublimation method at different temperatures (Ts) of the glass substrate. The XRD analysis reveals that the obtained films only correspond to a single wurtzite phase. The microstress level in Dy doped CdS films decreases compared with undoped films. The results of the pole density calculations show that at Ts  (573-673) K the [002] crystallographic direction corresponds to the main axial growth texture. The intrinsic defects in the investigated films were studied based on the low temperature photoluminescence measurements. It was shown that the CdS:Dy thin films are sufficiently stoichiometric. Analysis of the free exciton reflection spectra indicates that the polarization of the bands corresponds to the optical c-axis perpendicular to the substrate surface. The optical transmittance of CdS:Dy thin films in the range of transparency (600-800 nm) at room temperature exceeded 80 %. Based on the obtained results, it is concluded that the CdS:Dy thin films are excellent crystalline and optical quality and may be increase the efficiency their photovoltaic applications.

Список литературы