Applied Spectroscopy · 1982 · 16 citations · 3 references
Natural SciencesChemistryMaterials ScienceOptical MaterialsSemiconductor MaterialsSpectroscopyAbsorption SpectroscopyOptical Properties Of SolidsOptical SpectroscopyPerovskite MaterialsPhotochemical KineticsPhotochemistryAbsorption SpectraDiffuse Reflectance SpectroscopyPerovskite Oxide SemiconductorsPhotolysisPolycrystalline MaterialsTransient Absorption SpectroscopyTransient Reflectance Spectroscopy
A powdered semiconductor (ZnO) and a polycrystalline sample of perovskite-type LaAIO 3 doped with 1% Cr(III) have been subjected to the recently developed technique of diffuse reflectance flash photolysis. In both cases transient absorption spectra are obtained from these powdered, nontransparent samples and these are reported here. Thus, the method allows the direct observation of absorption by transient species formed following pulsed irradiation within powdered samples as well as from highly scattering interfaces demonstrating that the technique has high potential for investigating heterogeneous photochemical systems.
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