I. Abbasov, M. Musayev, J. Huseynov, M. Kostyrko, G. Eyyubov, D. Askerov
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Temperature behaviour of the photoluminescence spectra of polycrystalline ZnSe films with different surface treatment
We present the photoluminescence spectra obtained in the case of normal incidence of exciting radiation at both polished and unpolished surfaces of chemicalvapour deposited ZnSe films in the temperature range 12–300 K. The luminescence has been excited using either a continuous-wave He–Cd laser with the wavelength λex = 325 nm (i.e., under the condition hvex > Eg for the photon energy) or a semiconductor laser with λex = 532 nm (i.e., hvex < Eg). We show that the temperature dependences of intensity, spectral position and half-width of a green photoluminescence band detected in the both alternative cases are very different in the region 12–80 K. However, their behaviours become very close to each other when the temperature increases up to 180 K. Finally, the above spectral parameters are almost the same in the region 180–300 K.
期刊介绍:
“Ukrainian Journal of Physical Optics” contains original and review articles in the fields of crystal optics, piezo-, electro-, magneto- and acoustooptics, optical properties of solids and liquids in the course of phase transitions, nonlinear optics, holography, singular optics, laser physics, spectroscopy, biooptics, physical principles of operation of optoelectronic devices and systems, which need rapid publication.
The journal was founded in 2000 by the Institute of Physical Optics of the Ministry of Education and Science of Ukraine.