Abstract
A photovoltaic effect of solid solutions composed of (1− x)PbO, xCaO and 0.25Cr 2O 3 (0 ≦ x ≦ 0.5) is described as functions of time, wavelength, chopping frequency and light intensity, for the purpose of improving photovoltaic characteristics in a pure Pb 2CrO 5 photovoltaic device. The effect of substituting Ca into Pb on the photovoltaic characteristics is discussed in the form of comparison with the characteristics obtained for the pure Pb 2CrO 5 device, which favorably appears in the photovoltaic sensitivity and the time response in the region from x=0.005 to 0.1. Especially, the solid solution of the composition of 0.99PbO, 0.01CaO and 0.25Cr 2O 3 is promising for photosensitive devices.
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