Growth of single-phase Mg0.3Zn0.7O films suitable for solar-blind optical devices on RS-MgO substrates
2012 (English)In: Thin Solid Films, ISSN 0040-6090, E-ISSN 1879-2731, Vol. 520, no 6, 1705-1708 p.Article in journal (Refereed) Published
Single-phase rock-salt Mg0.3Zn0.7O film was fabricated on MgO (100) substrate by radio-frequency plasma assisted molecular beam epitaxy. A smooth surface was observed by in-situ reflection high-energy electron diffraction and ex-situ atomic force microscopy. X-ray diffraction characterization demonstrated a high-quality single-phase structure with highly (200) orientation and cube-on-cube epitaxial relationship. Zn fraction in the single-phase rock-salt Mg0.3Zn0.7O film was determined by Rutherford backscattering spectrometry. Optical property of the film was investigated by reflectance spectroscopy, which indicated a solar-blind band gap of 255.5 nm. The reason why Zn solubility limit is greatly enhanced in non-polar (100) film compared with (111) polar epilayer is tentatively discussed in this work, suggesting MgO (100) is more suitable for the synthesis of single-phase rock-salt MgZnO with high Zn content towards solar-blind opto-device applications.
Place, publisher, year, edition, pages
2012. Vol. 520, no 6, 1705-1708 p.
Magnesium zinc oxide, Molecular beam epitaxy, Magnesium oxide, Solar-blind, Rutherford backscattering spectrometry, X-ray diffraction
Other Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-92362DOI: 10.1016/j.tsf.2011.08.019ISI: 000300459200004ScopusID: 2-s2.0-84855973552OAI: oai:DiVA.org:kth-92362DiVA: diva2:516156
QC 201204172012-04-172012-04-022012-04-17Bibliographically approved