Photon cascade luminescence in CaAl 12O 19:Pr, Cr

• Published in: Journal of solid state chemistry Vol. 180; no. 10; pp. 2933 - 2941
• Main Authors: Nie, Z.G., Zhang, J.H., Zhang, X., Lü, S.Z., Ren, X.G., Zhang, G.B., Wang, X.J.
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 2007
• Subjects: Energy transfer; Photon cascade luminescence; Synchrotron radiation; Photon cascade luminescence; Energy transfer; Synchrotron radiation
• ISSN: 0022-4596; 1095-726X
• DOI: 10.1016/j.jssc.2007.08.024

In this report, the Cr 3+ ion was chosen as a co-dopant to modify the unpractical photon cascade emission properties of Pr 3+-doped CaAl 12O 19 phosphors, which emit one near-UV photon from the 1S 0 state followed by visible photons from the 3P 0 state, into phosphors that emits two visible photons through energy transfer. The photon cascade emission process via energy transfer and the transfer mechanisms were systemically investigated by luminescence spectra and dynamics using synchrotron radiation as one of the excitation sources. The internal visible quantum efficiency of CaAl 12O 19:Pr, Cr was estimated and compared with CaAl 12O 19:Pr and the drawback to obtain the visible quantum efficiency higher than unit for CaAl 12O 19:Pr, Cr as a practical VUV phosphor was also discussed. The Cr 3+ ion was chosen as a co-dopant to modify the photon cascade emission properties of CaAl 12O 19: Pr via energy transfer. The cascade emission process and the energy transfer mechanisms were systemically investigated. The drawback for CaAl 12O 19: Pr, Cr as a practical VUV phosphor was also discussed.