We report the observation of photo-Seebeck effect in tetragonal PbO crystals. The photo-induced carriers contribute to the transport phenomena, and consequently the electrical conductivity increases and the Seebeck coefficient decreases with increasing photon flux density. A parallel-circuit model is used to evaluate the actual contributions of photo-excited carriers from the measured transport data. The photo-induced carrier concentration estimated from the Seebeck coefficient increases almost linearly with increasing photon flux density, indicating a successful photo-doping effect on the thermoelectric property. The mobility decreases by illumination but the reduction rate strongly depends on the illuminated photon energy. Possible mechanisms of such photon-energy-dependent mobility are discussed.
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Research Article| November 07 2013
Photo-Seebeck effect in tetragonal PbO single crystals
P. S. Mondal;
P. S. Mondal, R. Okazaki, H. Taniguchi, I. Terasaki; Photo-Seebeck effect in tetragonal PbO single crystals. J. Appl. Phys. 7 November 2013; 114 (17): 173710. https://doi.org/10.1063/1.4829460
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