Blue electroluminescence from Sb-ZnO/Cd- ZnO/Ga-ZnO heterojunction diode fabricated by dual ion beam sputtering

Sushil Kumar Pandey, Vishnu Awasthi, Shruti Verma, Shaibal Mukherjee

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

p-type Sb-doped ZnO/i-CdZnO/n-type Ga-doped ZnO was grown by dual ion beam sputtering deposition system. Current-voltage characteristics of the heterojunction showed a diode-like rectifying behavior with a turn-on voltage of ∼5 V. The diode yielded blue electroluminescence emissions at around 446 nm in forward biased condition at room temperature. The emission intensity increased with the increase of the injection current. A red shifting of the emission peak position was observed with the increment of ambient temperature, indicating a change of band gap of the CdZnO active layer with temperature in low-temperature measurement.

Original languageEnglish (US)
Pages (from-to)30983-30991
Number of pages9
JournalOptics Express
Volume22
Issue number25
DOIs
StatePublished - Dec 15 2014

Bibliographical note

Publisher Copyright:
© 2014 Optical Society of America.

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