Luminescence centers in CaS:Er3+ |
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Authors: | A N Georgobiani A N Gruzintsev T V Nikiforova |
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Affiliation: | (1) Lebedev Institute of Physics, Russian Academy of Sciences, Leninskii pr. 53, Moscow, 119991, Russia;(2) Institute of Microelectronics Technology and High-Purity Materials, Russian Academy of Sciences, Chernogolovka, Moscow oblast, 142432, Russia |
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Abstract: | The diffuse reflectance, photoexcitation, and luminescence spectra and luminescence decay time of CaS:Er3+ have been measured at 77 and 300 K and different activator contents. The absorption and luminescence bands due to Er3+ centers and native defects have been revealed, and the radiative electronic transitions between excited and ground Er3+ states have been identified. The characteristic decay times of the Er3+ 2 H 11/2 and 4 F 9/2 states in CaS have been determined, and radiative energy transfer from excited states of native defects to erbium ions in CaS:Er3+ has been revealed. |
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