Journal
APPLIED PHYSICS LETTERS
Volume 97, Issue 4, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3473781
Keywords
calcium compounds; lanthanum compounds; photoconductivity; photodetectors; photoemission; pulsed laser deposition; thin films; transmission electron microscopy
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Funding
- NCET
- NSFC
- RFDP
- Beijing Natural Science Foundation
- Research Grants Council of the Hong Kong Special Administrative Region [C001-2060295]
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We report the voltage tunable photodetecting properties of a La0.4Ca0.6MnO3 film grown on miscut LaSrAlO4 (001) substrates under ultraviolet pulsed laser irradiation at ambient temperature. The photovoltage and photocurrent peak sensitivities can be tuned in the range of 0.295-0.786 V/mJ and 0.172-0.314 A/mJ, respectively, when the applied bias is changed from -20 to +20 V, indicating that the vicinal manganite film can be used as an electric tunable ultraviolet photodetector. A possible mechanism based on the high resolution transmission electron microscopy is introduced to explain the experiment results. (C) 2010 American Institute of Physics. [doi:10.1063/1.3473781]
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