Photoluminescence dynamics of Co-doped Zn_1−xCd_xSe and ZnS_xSe_1−x crystals

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• 作者：Giriat ; W. ; Surkova ; T. ; Born ; H. ; Thurian ; P. ; Hoffmann ; A. ; Busse ; W. ; Gumlich ; H.-E. ; Broser ; I.
• 关键词：Transition metals ; ZnCdSe ; ZnSSe ; Photoluminescence dynamics ; Co
• 刊名：Journal of Crystal Growth
• 出版年：1998
• 出版时间：February 2, 1998
• 年：1998
• 卷：184-185
• 期：Complete
• 页码：1132-1136
• 全文大小：259 K

文摘

Intra-shell d-d relaxation processes of Co²⁺-centres are investigated by means of time-integrated and time-resolved photoluminescence spectroscopy. The composition dependence of the luminescence and the decay of the Co L-line in ZnCdSe and ZnSSe alloys is presented for the first time. Additionally, new Co-related infrared luminescence lines were observed near 1.6 eV. Taking into account the energy position of the L-line and the relaxation dynamics of the green and the infrared luminescence, the L-line is explained as an internal doublet-quartet d-d transition of the Co-centres.