Premium
Energy transfer from rare‐earth element to Mn in (Ca,Sr)Ga 2 S 4 compounds
Author(s) -
Obonai Toshimitsu,
Hidaka Chiharu,
Takizawa Takeo
Publication year - 2009
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200881190
Subject(s) - photoluminescence , rare earth element , doping , energy transfer , rare earth , analytical chemistry (journal) , emission spectrum , excitation , spectral line , coupling (piping) , chemistry , materials science , atomic physics , mineralogy , physics , chemical physics , optoelectronics , metallurgy , chromatography , quantum mechanics , astronomy
For realizing a red‐colour emission using SrGa 2 S 4 compounds, Mn and rare‐earth‐element (REE) co‐doping is tried. Photoluminescence (PL) and photoluminescence excitation (PLE) spectra are measured using samples so prepared. As a result, enhancement of the Mn red emission is observed. Considering the 4f and 5d levels of REE in the host material, it is expected that the energy transfer from REE to Mn is caused by the weak coupling between the d levels of REE and Mn. Moreover, in the Ce co‐doping case, another process is expected as a resonant energy transfer between the 4f–5d transition of Ce 3+ and a certain transition of Mn 2+ . To specify the Mn 2+ levels related to the resonant transfer, PL spectra of a Mn only doped CaGa 2 S 4 single crystal and an undoped one are measured at low temperatures, though we could not find emission expected to be related to the resonant transfer. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)