Idioma:

Room-temperature luminescence of excitons in ZnO/(Mg, Zn)O multiple quantum wells on lattice-matched substrates

Makino, T. ; Chia, C. H. ; Tuan, Nguen T. ; Sun, H. D. ; Segawa, Y. ; Kawasaki, M. ; Ohtomo, A. ; Tamura, K. ; Koinuma, H.

Applied physics letters, 2000-08, Vol.77 (7), p.975-977 [Periódico revisado por pares]

Texto completo disponível

Citações Citado por

Título:
Room-temperature luminescence of excitons in ZnO/(Mg, Zn)O multiple quantum wells on lattice-matched substrates
Autor: Makino, T. ; Chia, C. H. ; Tuan, Nguen T. ; Sun, H. D. ; Segawa, Y. ; Kawasaki, M. ; Ohtomo, A. ; Tamura, K. ; Koinuma, H.
É parte de: Applied physics letters, 2000-08, Vol.77 (7), p.975-977
Descrição: 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.
Idioma: Inglês

Voltar para lista de resultados