Author Affiliations
Abstract
1 School of Information Engineering, Hebei University of Technology, Tianjin 300401, China
2 Hebei Key Lab of Optic-Electronic Information and Materials, College of Physics Science and Technology, Hebei University, Baoding 071002, China
Light-induced transverse thermoelectric effect is investigated in incline-oriented Bi2Sr2Co2Oy thin films covered with a graphite light absorption layer. Upon the illumination of a 980 nm cw laser, an enhanced voltage signal is detected and the improvement degree is found to be dependent on the thickness of the graphite layer. A two-dimensional (2D) heat transport model using the finite-difference method provides a reasonable explanation to the experimental data. Present results give some valuable instructions for the design of light absorption layers in this type of detector.
310.6845 Thin film devices and applications 040.5160 Photodetectors 230.4170 Multilayers Chinese Optics Letters
2015, 13(6): 063101
Author Affiliations
Abstract
Lateral photovoltaic (LPV) effects are observed in Bi2Sr2Co2Oy (BSCO) thin films. Upon illumination of a 532-nm constant laser, the lateral photovoltage is observed to vary linearly with the laser position between two electrodes on the film surface, and the position sensitivity can be enhanced by coating a layer of graphite on the surface of the BSCO film as a light absorber. Results suggest that the LPV effect in the thin film is independent of the photo-generated carriers but originates from thermoelectric effects. The present work demonstrates a potential application of BSCO films in position-sensitive photo (thermal) detectors.
310.6845 Thin film devices and applications 040.5160 Photodetectors 240.0310 Thin films Chinese Optics Letters
2013, 11(12): 123101
