A Multiphase Strategy for Realizing Green Cathodoluminescence in 12CaO·7Al2O3–CaCeAl3O7:Ce3+,Tb3+ Conductive PhosphorDalton Transactions
AbstractA multiphase strategy is proposed and successfully applied to make the insulating green phosphor CaCeAl3O7:Tb3+ conductive in the form of 12CaO·7Al2O3–CaCeAl3O7:Ce3+,Tb3+. The phosphor shows bright green-light emission with a short lifetime (2.51 ms) under low-voltage electron beam excitation (3 kV). The green photo- and cathodoluminescence from 5D4–7FJ (J = 6, 5, 4, 3) transitions of Tb3+ are significantly enhanced in comparison with pure C12A7:Tb3+. It was confirmed that this enhancement is the consequence of the joint effects of energy transfer from Ce3+ to Tb3+ and broadening of the absorption spectrum of Ce3+ due to the existence of multiple phases. In particular, under 800 V electron beam excitation, cathodoluminescence is improved by the modified electrical conductivity of the phosphor. When compared to the commercial Zn2SiO4:Mn2+ with a long luminescence lifetime of 11.9 ms, this conductive green phosphor has greater advantage for fast displays.
Citation InformationXiuling Liu, Yuxue Liu, Duanting Yan, Hancheng Zhu, et al.. "A Multiphase Strategy for Realizing Green Cathodoluminescence in 12CaO·7Al2O3–CaCeAl3O7:Ce3+,Tb3+ Conductive Phosphor" Dalton Transactions Vol. 42 Iss. 46 (2013) p. 16311 - 16317
Available at: http://works.bepress.com/xiao-jun_wang/43/