@article{oai:niigata-u.repo.nii.ac.jp:00003600, author = {太田, 雅壽 and 丸山, みずほ and 早川, 陽喜 and 西條, 智彦}, issue = {3}, journal = {日本セラミックス協会学術論文誌, 日本セラミックス協会学術論文誌}, month = {Mar}, note = {SrAl_2O_4 phosphor excited with fluorescent light or sunlight, has been recently reported to be a long-lasting afterglow (AG) phenomenon. However, the AG mechanism has not been clarified yet. In this study, the long-lasting AG mechanism of SrArAl_2O_4 phosphors doped with Eu and/or Dy, was investigated on the basis of AG, photoluminescence (PL), and thermoluminescence (TL) measurements after UV or X-ray irradiation. A hole trap is presumed to be ascribed to Sr defects, which increases and is stabilized by a charge compensation behavior upon doping Dy ion. An electron trap probably originates from oxygen defects, as produced by firing in a reductive atmosphere. Furthermore, the role of dopants (Eu, Dy ion) on SrAl_2O_4 phosphor co-doped with Eu and Dy ions, was studied by comparing the luminescence (AG and PL) phenomena with the distribution of dopant in SrAl_2O_4 matrix. Eu ion contributed closely to both the AG and PL behaviors, while the Dy ion contributes only to the AG phenomenon.}, pages = {284--289}, title = {長残光アルミン酸ストロンチウム蛍光体における付活剤の役割}, volume = {108}, year = {2000} }