Title :
Processing and adsorption control in ZnO single nanowire photodetectors
Author :
Lopez-Ponce, M. ; Hierro, A. ; Ulloa, J.M. ; Munoz, E. ; Yamamoto, K. ; Nakamura, A. ; Temmyo, J.
Author_Institution :
Dept. de Ing. Electron., U.P.M., Madrid, Spain
Abstract :
ZnO single nanowire photodetectors have been measured in different ambient conditions in order to understand and control adsorption processes on the surface. A decrease in the conductivity has been observed as a function of time when the nanowires are exposed to air, due to adsorbed O2/H2O species at the nanowire surface. In order to have a device with stable characteristics in time, thermal desorption has been used to recover the original conductivity followed by PMMA coating of the exposed nanowire surface.
Keywords :
II-VI semiconductors; adsorption; desorption; hydrogen compounds; nanophotonics; nanowires; oxygen; photodetectors; polymers; zinc compounds; O2-H2O; PMMA coating; ZnO; adsorption control; single nanowire photodetectors; thermal desorption; Annealing; Conductivity; Lighting; Photodetectors; Surface treatment; Temperature measurement; Zinc oxide; ZnO; adsorption; nanophotodetectors; nanowires; transport;
Conference_Titel :
Electron Devices (CDE), 2011 Spanish Conference on
Conference_Location :
Palma de Mallorca
Print_ISBN :
978-1-4244-7863-7
DOI :
10.1109/SCED.2011.5744157
