MgxZn1-xO epitaxial films grown on ZnO substrates by molecular beam epitaxy

H. Yuji; K. Nakahara; K. Tamura; S. Akasaka; A. Sasaki; T. Tanabe; H. Takasu; T. Onuma; S. F. Chichibu; A. Tsukazaki; A. Ohtomo; M. Kawasaki

doi:10.1117/12.774974

15 February 2008 Mg_xZn_1-xO epitaxial films grown on ZnO substrates by molecular beam epitaxy

H. Yuji, K. Nakahara, K. Tamura, S. Akasaka, A. Sasaki, T. Tanabe, H. Takasu, T. Onuma, S. F. Chichibu, A. Tsukazaki, A. Ohtomo, M. Kawasaki

Author Affiliations +

Proceedings Volume 6895, Zinc Oxide Materials and Devices III; 68950D (2008) https://doi.org/10.1117/12.774974
Event: Integrated Optoelectronic Devices 2008, 2008, San Jose, California, United States

Abstract

Thin films of ZnO and Mg_xZn_1-xO were epitaxially grown on Zn-polar ZnO substrates by plasma assisted molecular beam epitaxy. The miscut of c-plane ZnO substrates toward the [1-100] axis direction leads to a flat substrate surface with straight step edges. The growth mode of epitaxial ZnO films significantly depended on the growth temperature, and a substrate temperature over 800°C was needed for flat film surfaces with monolayer-height steps. Photoluminescence (PL) peak originating from the n = 2 state of A-free excitons was observed at 12 K for the ZnO films grown under stoichiometric and O-rich growth conditions. Mg_xZn_1-xO films were also fabricated under Zn-rich conditions. The film surface exhibited a step-and-terrace structure. The effective PL lifetime of Mg_0.08Zn_0.92O film was as long as 1.9 ns, which is the highest value ever reported, presumably due to a high purity level of the film.

Citation Download Citation

H. Yuji, K. Nakahara, K. Tamura, S. Akasaka, A. Sasaki, T. Tanabe, H. Takasu, T. Onuma, S. F. Chichibu, A. Tsukazaki, A. Ohtomo, and M. Kawasaki "Mg_xZn_1-xO epitaxial films grown on ZnO substrates by molecular beam epitaxy", Proc. SPIE 6895, Zinc Oxide Materials and Devices III, 68950D (15 February 2008); https://doi.org/10.1117/12.774974

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available