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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.
Chia, C. H.
Tuan, N. T.
|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.||URI:||https://hdl.handle.net/10356/101295
|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 http://apl.aip.org/.||Fulltext Permission:||open||Fulltext Availability:||With Fulltext|
|Appears in Collections:||SPMS Journal Articles|
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