The Effect of Vacuumization on the Photoluminescence and Photoresponse Decay of ZnO Nanostructures Grown by Different Methods

Yuriy Rudyk1 yurarudyk [at] ukr.net
Mykola Rudko2 rydko_mykol [at] ukr.net
Borys Turko2
Viktor Rudyk2
Myron Panasiuk2
Volodymyr Kapustianyk1,2
Andriy Vaskiv2
  1. Solid State Physics Chair, Ivan Franko National University of Lviv, Ukraine, Lviv, Universytetska street 1.
  2. Scientific-Technical and Educational Center of Low Temperature Studies, Ivan Franko National University of Lviv, Ukraine, Lviv, Dragomanova street 50.
Abstract 

The effect of vacuumization on photoluminescence (PL) spectra and photoresponse decay of ZnO nanostructures fabricated by different methods was investigated. The visible band of photoluminescence and ultraviolet (UV) photosensitivity of the samples grown from the vapor phase was associated with the surface defects such as oxygen vacancies, and for the samples grown by hydrothermal method - with presence of the surface hydroxyl groups. The experimental results show that ZnO nanostructures grown from the vapor phase would be promising for producing of the low cost and effective UV detecting devices.

Keywords 
zinc oxide
nanostructures
photoluminescence
detectors of ultraviolet
defects
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