García Marín, A., Garcia Nunez, C. , Ruiz, E., Piqueras, J. and Pau, J.L. (2013) Fast response ZnO:Al/CuO nanowire/ZnO:Al heterostructure light sensors fabricated by dielectrophoresis. Applied Physics Letters, 102(23), 232105. (doi: 10.1063/1.4811128)
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Abstract
Metal oxide nanowire (NW) photoconductors tend to exhibit high photoconductive gains and long recovery times mainly due to surface effects. In this work, p-type CuO NWs are synthesized by direct oxidation of copper and deposited on n-type ZnO:Al electrodes by dielectrophoresis. The heterostructure is electro-optically characterized showing recovery times in the 10 μs range, mainly limited by the resistance-capacitance product of the equivalent circuit, without signs of persistent effects. The fast response is attributed to short transit times across space charge regions built between CuO and ZnO:Al materials and fast carrier recombination at neutral regions.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Garcia Nunez, Dr Carlos |
| Authors: | García Marín, A., Garcia Nunez, C., Ruiz, E., Piqueras, J., and Pau, J.L. |
| College/School: | College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering |
| Journal Name: | Applied Physics Letters |
| Publisher: | AIP Publishing LLC |
| ISSN: | 0003-6951 |
| ISSN (Online): | 1077-3118 |
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