Abstract
The electronic structure properties of undoped single crystals of (LBAF) were determined using low-temperature () time-resolved far-ultraviolet (3.7–40 eV) synchrotron radiation spectroscopy, calculations for the spectra of optical functions, and x-ray photoelectron spectroscopy. The bandgap of the investigated compound was found at , the energy threshold for creation of the unrelaxed excitons at , and the low-energy fundamental absorption edge at 11.0 eV. The subnanosecond photoluminescence emission band at 6.6 eV in LBAF single crystal is due to radiative valence-core transitions .
© 2014 Optical Society of America
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