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Vertically aligned ZnO nanorod array/CuO heterojunction for UV detector application
Author(s) -
Vikas L. S.,
Sanal K. C.,
Jayaraj M. K.,
Antony A.,
Puigdollers J.
Publication year - 2014
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201431221
Subject(s) - nanorod , materials science , heterojunction , optoelectronics , rectification , substrate (aquarium) , luminescence , voltage , nanotechnology , oceanography , physics , quantum mechanics , geology
Vertically aligned ZnO nanorod array (ZNA) was deposited by electrodeposition technique over glass substrate coated with Al doped ZnO (AZO). The photo‐luminescence spectrum of the ZNA showed a near band edge emission and deep level emission (DLE). The resolved DLE spectrum indicates the formation of various defect levels within the band gap of ZnO. P‐type CuO was deposited on ZNA to form ZNA/CuO heterojunction. The voltage–current ( V – I ) characteristics show a turn on voltage of 0.65 V. The device showed good rectification behavior and a rectification ratio of 50 at 1 V. The heterojunction with a device structure AZO/ZNA/CuO/Au showed good response on ultra violet (UV) illumination. The device has stability even after long exposures to atmospheric conditions and UV light.