Vanadium substitution: a simple and efficient way to improve UV sensing in ZnO

Tulika Srivastava; Gaurav Bajpai; Gyanendra Rathore; Sajal Biring; Somaditya Sen

doi:10.1063/1.5012877

Vanadium substitution: a simple and efficient way to improve UV sensing in ZnO

Materials Science 2018-04-04 v1

Authors: Tulika Srivastava , Gaurav Bajpai , Gyanendra Rathore , Sajal Biring , Somaditya Sen

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

UV sensing in pure ZnO is due to oxygen adsorption/desorption process from ZnO surface. Vanadium doping improves UV sensitivity of ZnO. Enhancement in UV sensitivity in doped ZnO is attributed to trapping and de-trapping of electrons at V4+ & V5+-related defect states. An extra electron in the V4+ state is excited under UV illumination while in absence of the same a trapping happens at the V5+ state. An insight to the mechanism is obtained by an analytic study of the response phenomenon.

Keywords

ZnO vanadium doping UV sensing defect states oxygen adsorption photoresponse

Cite

@article{arxiv.1710.05998,
  title  = {Vanadium substitution: a simple and efficient way to improve UV sensing in ZnO},
  author = {Tulika Srivastava and Gaurav Bajpai and Gyanendra Rathore and Sajal Biring and Somaditya Sen},
  journal= {arXiv preprint arXiv:1710.05998},
  year   = {2018}
}

Related papers

View all related →