A series of works «Novel materials based on zinc oxide for designing the optoelectronic devices»

Work number - M 18 AWARDED

Authors: Ievtushenko A.I., Shtepliuk I.I.

Submitted by the Frantsevich Institute for Problems of Materials Science, NAS of Ukraine

A series of works consists of 93 publications, published during the2008-2013.

The aim of this work is to study the growth features, structural and electronic, phonon and optical properties of the doped zinc oxide films and solid solutions based on them, which are required for designing the competitive and high-performance optoelectronic devices. An investigation of the grown films and structures was carried out through a combination of modern and high-precision experimental techniques: X-ray diffraction (XRD), atomic force microscopy (AFM), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), mass spectroscopy of secondary ions (SIMS), optical transmission, cathodo- and photoluminescence, time-resolved photoluminescence.

A number of new fundamental results that contribute to the understanding of growth process of ZnO:(N, N-Al, Cd, Se) films and structures based on them, the features of the band structure, the nature of the radiative recombination mechanisms was obtained. It was found the (i) correlation between the radiative lifetime and stoichiometric ratio, (ii) mechanisms of the electron-phonon scattering, (iii) a positive effect of the co-doping by nitrogen and aluminum on the photoelectric properties of the photodetectors based on them. It was developed and studied the highly-sensitive and high-speed thin-film photodetectors based on N-doped ZnO and n-Zn_1-xCd_xO/p-SiC, n-ZnO/p-CdTe heterostructures with improved electrical characteristics, which are promising for making light-emitting devices in the visible range.

The obtained results are of great practical importance for the implementation and development in Ukraine scientific and technical basis of new optoelectronics devices, in particular in the frames of the priority directions of science and technology "New materials and substances" and "Energy and Energy Efficiency."

Scientific publications on the topic of work: 25 papers in international journals with high impact factor. Total sum of the times cited - 97 (according to the SCOPUS database), h-index - 6.

Total number of authors’ publications - 138.