Laser-induced voltage effects in Ca3Co4O9 thin films on tilted LaAlO3(001) substrates grown by chemical solution deposition

doi:10.1088/1674-1056/19/10/107201

Abstract Laser-induced voltage effects in c-axis oriented Ca₃Co₄O₉ thin films have been studied with samples fabricated on 10° tilted LaAlO₃ (001) substrates by a simple chemical solution deposition method. An open-circuit voltage with a rise time of about 10 ns and full width at half maximum of about 28 ns is detected when the film surface is irradiated by a 308-nm laser pulse with a duration of 25 ns. Besides, open-circuit voltage signals are also observed when the film surface is irradiated separately by the laser pulses of 532 nm and 1064 nm. The results indicate that Ca₃Co₄O₉ thin films have a great potential application in the wide range photodetctor from the ultraviolet to near infrared regions.

Keywords: laser-induced voltage Ca₃Co₄O₉ thin films chemical solution deposition

Received: 05 March 2010
Revised: 03 May 2010
Accepted manuscript online:

PACS:	61.80.Ba	(Ultraviolet, visible, and infrared radiation effects (including laser radiation))
	61.82.Ms	(Insulators)
	68.55.A-	(Nucleation and growth)
	72.20.Pa	(Thermoelectric and thermomagnetic effects)
	73.50.Lw	(Thermoelectric effects)
	81.15.Lm	(Liquid phase epitaxy; deposition from liquid phases (melts, solutions, And surface layers on liquids))

Fund: Project supported by the Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 10904030), and the Natural Science Foundation of Hebei Province, China (Grant No. A2009000144).

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Wang Shu-Fang(王淑芳), Chen Ming-Jing(陈明敬), Zhao Shu-Rui(赵书瑞), Chen Jing-Chun(陈景春), He Li-Ping(何立平), Yu Wei(于威), Wang Jiang-Long(王江龙), and Fu Guang-Sheng(傅广生) Laser-induced voltage effects in Ca₃Co₄O₉ thin films on tilted LaAlO₃(001) substrates grown by chemical solution deposition 2010 Chin. Phys. B 19 107201

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Laser-induced voltage effects in Ca3Co4O9 thin films on tilted LaAlO3(001) substrates grown by chemical solution deposition

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Laser-induced voltage effects in Ca₃Co₄O₉ thin films on tilted LaAlO₃(001) substrates grown by chemical solution deposition