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Ultraviolet photovoltaic effect in tilted orientation LaAlO3 single crystals

✍ Scribed by Xu Wang; Jie Xing; Kun Zhao; Jie Li; Yanhong Huang; Kui-juan Jin; Meng He; Huibin Lu; Guozhen Yang

Publisher
Elsevier Science
Year
2007
Tongue
English
Weight
198 KB
Volume
392
Category
Article
ISSN
0921-4526

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✦ Synopsis

Pulsed laser-induced photovoltaic effects were observed in the tilted orientation LaAlO 3 (LAO) single crystal wafers without any bias at ambient temperature when the LAO wafers were irradiated by the laser pulses of 246 nm ultraviolet (UV) wavelength. The rise time is 13 ns, and the full-width at half-maximum (FWHM) is 25 ns for the open-circuit photovoltage. The sensitivities of the photovoltage and the photocurrent are 270 mV/mJ and 0.91 mA/mJ for the tilting 201 LAO wafer, respectively. The mechanism of the photo-induced photovoltage in LAO wafers is proposed as the combination of a photoelectric process and a Seebeck one.

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