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8359064 
Journal Article 
Study on the luminescence and energy level of lanthanide ions in Lu(0.8)Sc(0.2)BO3 host 
Wu, Y; Ren, G; Nikl, M; Ding, D; Wang, J; Shang, S; Yang, F; Pan, S; , 
2011 
1 
Journal of Physical Chemistry A
ISSN: 1089-5639
EISSN: 1520-5215 
AMER CHEMICAL SOC 
WASHINGTON 
13821-13828 
English 
22026808 
WOS:000297195300011 
Emission and excitation spectra of undoped and Ln(3+) (Ln = Ce, Pr, Nd, Yb)-doped Lu(0.8)Sc(0.2)BO(3) were studied by vacuum ultraviolet spectroscopy, and the X-ray excited luminescence spectra were measured as well at room temperature. The undoped specimen presented two different emissions upon excitation at energies in the vicinity of the band gap or with X-ray. The emission at the highest energy side, located at 4.77 eV, was ascribed to self-trapped exciton, which is anchored by electron capture around the Sc site. We also observed three broad emission bands at 4.43, 3.02, and 2.10 eV, which might be attributed to the trapped exciton, defect -related emissions, or both. Energy transfer processes to the doped lanthanide ions in Lu(0.8)Sc(0.2)BO(3) via exciton state or sequential electron-hole capture are discussed. Finally, the energy level diagram for divalent and trivalent lanthanides in Lu(0.8)Sc(0.2)BO(3) was constructed using the obtained spectroscopic parameters and the three parameters method (Dorenbos, P. J. Phys.: Condens. Matter 2003, 15, 8417).