Photochromism and white long-lasting persistent luminescence in Bi^3+-doped ZnGa_2O_4 ceramics
- 7 September 2012
- journal article
- Published by Optica Publishing Group in Optical Materials Express
- Vol. 2 (10), 1378-1383
- https://doi.org/10.1364/ome.2.001378
Abstract
White long-lasting persistent luminescence covering the whole visible region in Bi[3+]-doped ZnGa[2]O[4] ceramics is reported. The afterglow luminescence can be observed for several tens of minutes after 360 nm or 280 nm excitation. Photochromism is also observed during ultra-violet excitation. The persistent luminescence and photochromism are considered to originate from electron trapping by defect centers in the ZnGa[2]O[4] crystals. The Bi[3+]-doped ZnGa[2]O[4] ceramics are expected to be potential white-color afterglow phosphorsKeywords
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