Structural, opto-electronic, electrical and photosensing properties of Ga and Ga-Si codoped ZnO

Abstract

2360 oC with a heat capacity of 9.62cal/deg/mole at 25oC. Its molecular weight is 81.38 g/mol with a relative density of 5.607 g-cm-3 . 1.2.2 Optical Properties: Pure ZnO is expected to be transparent to light in the visible region but absorbs ultra violet light. This property is due to ZnO having an optical bandgap of ~3.3eV at room temperature and ~3.44eV at temperatures of 4K[4] which corresponds to light in the UV region. This optical property of ZnO can be used for applications in photo detectors, solar cells, UV filters, etc. [4,5-7]. ZnO shows a sharp absorption peak near the vicinity of 380nm (UV region) in the photoluminescence spectra which is attributed to band to band transition and a broader emission band in the visible region which has been attributed to the intrinsic defects present in the ZnO structure.