Abstract
Different kinds of metal oxide (anatase, ZnO and SrTiO 3) fine particles were dispersed in silver iodide (AgI). These composites exhibit considerable electrical conductivity enhancement. When these composites are irradiated with a 325 nm laser light in vacuum, their photoluminescence spectra are changed. By irradiating with same laser light at room temperature in O 2 gas, the original spectral structure reappears. The observed reversible phenomena are explained by some excitation energy transfer and taps at the interfaces between AgI and oxide particles. Such reversible phenomena may yield materials for optical oxygen-partial-pressure sensors.
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