Self-powered ultraviolet photovoltaic effects based on metal/SrTiO3Schottky junctions
1 Shaanxi Key Laboratory of Condensed Matter Structures and Properties, School of Science, Northwestern Polytechnical University - Xi'an 710072, China
2 Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University - 21 Nanyang Link, Singapore 637371, Singapore
Received: 14 July 2013
Accepted: 30 August 2013
Self-powered ultraviolet photovoltaic effects have been investigated in metal/SrTiO3 Schottky junctions. The absorption edge of the SrTiO3 single crystal is about 389 nm. The peak photovoltage of the Pt/SrTiO3 junction is about 0.50 V at when it is illuminated by a KrF excimer laser with a wavelength of 248 nm. The peak photovoltages decrease with increasing the temperature due to the strong thermal fluctuation. Moreover, the peak photovoltages almost linearly increase with an increase in the power density of the laser at . The experimental results reveal it may be useful for self-powered ultraviolet detecting sensitive devices.
PACS: 73.40.Ns – Metal-nonmetal contacts / 61.80.Ba – Ultraviolet, visible, and infrared radiation effects (including laser radiation) / 72.40.+w – Photoconduction and photovoltaic effects
© EPLA, 2013