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Title: Room-temperature luminescence of excitons in ZnO/(Mg,Zn)O multiple-quantum wells on lattice-matched substrates
Authors: Segawa, Y.
Kawasaki, M.
Ohtomo, A.
Makino, T.
Chia, C. H.
Tuan, N. T.
Sun, Handong
Tamura, K.
Koinuma, H.
Keywords: DRNTU::Science::Physics
Issue Date: 2000
Source: Makino, T., Chia, C. H., Tuan, N. T., Sun, H. D., Segawa, Y., Kawasaki, M., et al. (2000). Room-temperature luminescence of excitons in ZnO/(Mg, Zn)O multi-quantum wells on lattice-matched substrates. Applied Physics Letters, 77(7), 975-977.
Series/Report no.: Applied Physics Letters.
Abstract: We report on the optical properties of ZnO/(Mg, Zn)O multiple quantum wells (MQWs) on lattice-matched ScAlMgO4 substrates fabricated by laser molecular-beam epitaxy. As the well layer thickness decreased down to 7 Å, the photoluminescence (PL) and absorption peaks showed a systematic blueshift, consistent with the quantum-size effect. Moreover, a bright PL of free excitons could be observed even at room temperature. As a result, the PL could be tuned in the energy range of 3.3–3.6 eV by choosing the appropriate barrier height and well layer thickness. The widest tunability on the room-temperature luminescence of the excitons could be attained on the basis of the ZnO quantum structure. These favorable properties could not be attained in the MQWs on lattice-mismatched sapphire substrates.
ISSN: 0003-6951
DOI: 10.1063/1.1289066
Rights: Applied Physics Letters © copyright 2000 American Institute of Physics. The journal's website is located at
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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