title: Bright green-emitting, energy transfer and quantum cutting of Ba3Ln(PO4)3: Tb3+ (Ln = La, Gd) under VUV-UV excitation.
abstract: Tb3+ doped Ba3Gd(PO4)3 and Ba3La(PO4)3 phosphors were synthesized using the traditional high temperature solid state reaction method. The excitation, emission, and decay spectra were measured at room temperature. Efficient energy transfer (ET) from Gd3+ to Tb3+ exists in Tb3+ doped Ba3Gd(PO4)3, and the ET efficiency increases with the increase of Tb3+ concentration. The visible quantum cutting (QC) via cross relaxation was observed upon exciting low-spin (7D(J)) 5d levels of Tb3+ ions. Ba3Tb(PO4)3 sample shows relatively strong emission intensity in comparison with Zn2SiO4: Mn2+ (ZSM) upon 172 nm excitation, and with a decay time τ(1/10) about 6.4 ms under 351 nm excitation, indicating the potential application of this phosphor for plasma display panels (PDPs) and Hg-free lamps.
authors.affiliation: KLGHEI of Environment and Energy Chemistry, MOE Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou, China.
authors.forename: Dejian
authors.initials: D
authors.lastname: Hou
authors.forename: Hongbin
authors.initials: H
authors.lastname: Liang
authors.forename: Mubiao
authors.initials: M
authors.lastname: Xie
authors.forename: Xuemei
authors.initials: X
authors.lastname: Ding
authors.forename: Jiuping
authors.initials: J
authors.lastname: Zhong
authors.forename: Qiang
authors.initials: Q
authors.lastname: Su
authors.forename: Ye
authors.initials: Y
authors.lastname: Tao
authors.forename: Yan
authors.initials: Y
authors.lastname: Huang
authors.forename: Zhenhua
authors.initials: Z
authors.lastname: Gao