TITLE

Using graded barriers to control the optical properties of ZnO/Zn0.7Mg0.3O quantum wells with an intrinsic internal electric field

AUTHOR(S)
Hall, C. R.; Dao, L. V.; Koike, K.; Sasa, S.; Tan, H. H.; Inoue, M.; Yano, M.; Jagadish, C.; Davis, J. A.
PUB. DATE
May 2010
SOURCE
Applied Physics Letters;5/10/2010, Vol. 96 Issue 19, p193117
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Quantum wells with graded barriers are demonstrated as a means to control both the transition energy and electron-hole wave function overlap for quantum wells with an intrinsic internal electric field. In the case of c-axis grown ZnO/ZnMgO quantum wells, the graded barriers are produced by stepping the magnesium composition during the growth process. Four quantum wells with different structures are examined, where each well has similar transition energy, yet a wide range of wave function overlaps are observed. Photoluminescence and time resolved photoluminescence show good agreement with calculations.
ACCESSION #
50510737

 

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