New Green Phosphors Ba（1-x）SrxZr（BO3）2 Doped with Tb^3＋ for PDP Applications

摘要

In Ba （1-x）SrxZr（BO3）2∶Tb 3+, the VUV excitation spectrum consists of one broad band at 120～170 nm and some bands ranging from 160～300 nm. The former is assigned to the absorption of the borate groups. The latter bands are due to the transitions of Tb 3+（4f8→4f75d）. The host absorption band moves about 30 nm to the high energy region with x increasing. As the Ce 3+ is doped in the samples, the absorption band evidently decreases in VUV region. The emission spectrum reveals an intense and sharp （546 nm） green emission from Tb 3+（5D4→7F5） transition and three other weaker emission 5D4→7F （6,4,3） at 492, 589, 624 nm under 147 nm excitation.