Abstract
The structural features and real compositions with point defects of Bi+-doped TlCdCl3 and TlCdI3 single crystals, grown by the Bridgman-Stockbarger technique, are first studied using the X-ray diffraction, X-ray synchrotron radiation, and EXAFS/XANES spectroscopy. In the structures of Bi+-doped TlCdCl3 and TlCdI3 crystals, the Cd, Cl, and I sites are found to be defect-free. The vacancies in the Tl sites and interstitial Bi atoms located in the vicinity of the Tl sites are detected in the structures of both samples. In the Bi+-doped TlCdCl3, the presence of a small amount of Bi+ ions in the Tl+ sites is possible. The correlation between photoluminescence bands and point defects in the refined structures are determined. Photoluminescence spectra and decay kinetics of the Bi+-doped TlCdCl3 and TlCdI3 demonstrate that they are attractive materials for potential applications in photonics.
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The authors express sincere gratitude to SNBL beamline of ESRF for its hospitality.
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Daria Vtyurina received her bachelor degree (2006) and master degree (2009) from the Lomonosov Moscow State University and PhD (2017) from Semenov Institute of Chemical Physics, Russian Academy of Science. From 2008 to 2011, she works as a senior researcher at the Lomonosov Moscow State University. She joined Semenov Institute of Chemical Physics as a senior researcher in 2012. Her research interests include the spectroscopy and the photoluminescence in crystals.
Irina Kaurova received her bachelor degree (2005), master degree (2007), and PhD (2010) from the Moscow State Academy of Fine Chemical Technology. From 2010 to 2014, she works as an associate professor at the Moscow State Open University. She joined Moscow Technological University as senior researcher in 2014. Her research interests include the solid state chemistry and characterization of functional materials.
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Vtyurina, D.N., Eistrikh-Geller, P.A., Kuz’micheva, G.M. et al. Influence of monovalent Bi+ doping on real composition, point defects, and photoluminescence in TlCdCl3 and TlCdI3 single crystals. Sci. China Mater. 60, 1253–1263 (2017). https://doi.org/10.1007/s40843-017-9118-3
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DOI: https://doi.org/10.1007/s40843-017-9118-3