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The infrared optical properties of anisotropic mesoporous silicon films containing free charge carriers (holes) are studied experimentally and theoretically. The results of simulation of the optical properties of the produced samples in the effective-medium approximation show a heavy dependence of the birefringence, reflection anisotropy, and dichroism on the concentration of free charge carriers...
We have studied the optical properties of thin films of organometallic halide perovskites with variable content of iodine and bromine, which were obtained by two-stage deposition from solution. The results are indicative of an increased contribution of excitons to light absorption at the bandgap edge in bromine-containing perovskites as compared to the iodine-containing ones. The possibilities of...
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