Publication d'Eirini Sarigiannidou

Ici vous trouverez l'article d'Eirini Sarigiannidou :
"The elucidation of the residual and intentional doping processes in ZnO nanowires (NWs) grown by chemical bath deposition (CBD) is a major but still largely unexplored issue despite its primary importance for many nanoscale engineering devices. Here, we investigate the local structural environment around Ga dopants in ZnO NWs by combining synchrotron radiation-based x-ray linear dichroism with density functional theory calculations. We show that the family of $V_{\mathrm{Zn}}\text{−}{\mathrm{Ga}}_{\mathrm{Zn}}\text{−}nH$ defect complexes is predominantly formed and hence that hydrogen acts as an efficient passivating species even for intentional dopants like Ga. The residual and intentional doping processes are found to be highly correlated through significant interplay effects. These findings revisit the nature of intentional dopant-induced defects and defect complexes in ZnO NWs. They further reveal that hydrogen should be considered in unintentionally doped ZnO NWs grown by CBD as major defects but also in intentionally doped ZnO NWs through its efficient passivating effect, opening perspectives to more finely control their optical and electrical properties."