The structural and optical properties of mg-doped zinc oxide multiquantum barrier thin films.

ZnO/Zn 1 − x Mg x O asymmetric quantum barriers on JGS1 quartz glass and Al 2 O 3 substrates were prepared by a pulsed laser deposition (PLD) technique. Microstructure characterization confirmed the designed structure. Because of the design of ZnO/Zn 1 − x Mg x O asymmetric quantum barrier, representative exciton peaks were observed in the optical absorption spectrum at room-temperature. This confirmed that the designed ZnO/Zn 1 − x Mg x O asymmetric quantum barrier structure realized the quantum-binding effect at room-temperature. Moreover, when x = 0. 1 5 , the asymmetric quantum barrier structure had optimum performance compared with other x values. [ABSTRACT FROM AUTHOR]