Abstract
The diffuse reflectance and photoluminescence (PL) spectra of NdI2, SmI2, EuI2, DyI2, TmI2 and YbI2 were measured between 225 and 12 500 nm in order to determine their 4fn → 4fn−15d1 optical bandgaps. The results were compared with those obtained using an empirical model of the electronic structure of LnI2. The results can be used to explain the lanthanide valency and crystalline structure changes of other lanthanide diiodides such as PrI2.
Published Version
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