A multiphase strategy for realizing green cathodoluminescence in 12CaO center dot 7Al(2)O(3)-CaCeAl3O7:Ce3+,Tb3+ conductive phosphor

作者：Liu, Xiuling; Liu, Yuxue^*; Yan, Duanting; Zhu, Hancheng; Liu, Chunguang; Liu, Weizhen; Xu, Changshan; Liu, Yichun; Zhang, Hong; Wang, Xiaojun

来源：Dalton Transactions, 2013, 42(46): 16311-16317.

DOI：10.1039/c3dt51958a

• VACUUM-ULTRAVIOLET
• ENERGY-TRANSFER
• EMISSION
• LUMINESCENCE
• CE3+
• CONVERSION
• ELECTRIDE

A multiphase strategy is proposed and successfully applied to make the insulating green phosphor CaCeAl3O7:Tb3+ conductive in the form of 12CaO center dot 7Al(2)O(3)-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 D-5(4)-F-7(J) (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.

• 出版日期2013
• 单位东北师范大学