Auteur(s): Lopez-Ponce Manuel, Nakamura A., Suzuki M., Temmyo J., Agouram S., Martinez-Tomas Mc, Munoz-Sanjose V., Lefebvre P., Ulloa J.-M., Munoz E., Hierro A.
(Article) Publié: Nanotechnology, vol. 25 p.255202 (2014)
Ref HAL: hal-01009919_v1
PMID 24897432
DOI: 10.1088/0957-4484/25/25/255202
WoS: 000337501200004
Exporter : BibTex | endNote
8 Citations
Résumé:
We report on the growth and microstructure analysis of high Cd content ZnCdO/ZnO multiple quantum wells (MQW) within a nanowire. Heterostructures consisting of ten wells with widths from 0.7 to 10nm are demonstrated, and show photoluminescence emissions ranging from 3.03 to 1.97eV. The wells with thicknesses⩽2nm have high radiative efficiencies compared to the thickest ones, consistent with the presence of quantum confinement. However, a nanometric analysis of the Cd profile along the heterostructures shows the presence of Cd diffusion from the ZnCdO well to the ZnO barrier. This phenomenon modifies the band structure and the optical properties of the heterostructure, and is considered in order to correctly identify quantum effects in the ZnCdO/ZnO MQWs.