Giant laser-induced thermoelectric voltage in c-axis inclined  NaxCoO2 thin films

Shufang Wang; Haifeng Wang; Shanshan Chen; Zilong Bai; Guoying Yan; Jianglong Wang; Wei Yu; Guangsheng Fu

doi:10.1117/12.2001070

27 November 2012 Giant laser-induced thermoelectric voltage in c-axis inclined Na_xCoO₂ thin films

Shufang Wang, Haifeng Wang, Shanshan Chen, Zilong Bai, Guoying Yan, Jianglong Wang, Wei Yu, Guangsheng Fu

Proceedings Volume 8555, Optoelectronic Devices and Integration IV; 85551F (2012) https://doi.org/10.1117/12.2001070
Event: Photonics Asia, 2012, Beijing, China

Abstract

this paper, we have prepared c-axis inclined Na_xCoO₂ thin films on 10° and 20° tilted c-Al₂O₃ substrates and studied its light-induced thermoelectric voltage effect by using an ultraviolet pulsed laser as light source. A giant open-circuit voltage signal with the peak voltage V_p of tens of voltage was observed when the film surface was illuminated by the 308 nm pulsed radiation, and the V_p increased linearly with the inclination angle as well as the laser energy on the film. In addition, we found that Ag doping in Na_xCoO₂ films can improve the sensitivity of the thermoelectric voltage signal. The results demonstrate that c-axis inclined Na_xCoO₂ thin film has a great potential application in the detection of weak ultraviolet pulsed radiation.

Citation Download Citation

Shufang Wang, Haifeng Wang, Shanshan Chen, Zilong Bai, Guoying Yan, Jianglong Wang, Wei Yu, and Guangsheng Fu "Giant laser-induced thermoelectric voltage in c-axis inclined Na_xCoO₂ thin films", Proc. SPIE 8555, Optoelectronic Devices and Integration IV, 85551F (27 November 2012); https://doi.org/10.1117/12.2001070

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