The concentration quenching characteristics of 5D3-7FJ and 5D4-7FJ (J=0―6) transitions of Tb3+ in YBO3:Tb3+ phosphor

The photoluminescence quenching behaviors of ^5D3-^7Fj and ^5D4-^7Fj （J = 0—6） transitions of Tb^3＋ in YBO3：Tb under 130—290 nm excitation were systematically investigated. The results revealed that the quenching concentrations of both ^5D3-^7Fj and ^5D4-^7Fj transitions of Tb^3＋ in YBO3：Tb were mainly dependent on excitation wavelength. Particularly, the quenching concentrations of ^5D4-^7Fj transitions of Tb^3＋ under 130—290 nm excitation were correlated with excitation bands of YBO3：Tb. The quenching concentrations of ^5D3-^7Fj transitions remained at low concentration （2%） under 186—290 nm excitation and then increased gradually with energy of incoming excitation photon when excited at 130—186 nm. This dependence should be involved in their excitation mechanisms and quenching pathway in particular excitation region.[第一段]

The concentration quenching characteristics of 5D3-7F J and 5D4-7F J ( J =0–6) transitions of Tb3+ in YBO3:Tb3+ phosphor

The photoluminescence quenching behaviors of ⁵D₃-⁷F _J and ⁵D₄-⁷F _J (J = 0–6) transitions of Tb³⁺ in YBO₃:Tb under 130–290 nm excitation were systematically investigated. The results revealed that the quenching concentrations of both ⁵D₃-⁷F _J and ⁵D₄-⁷F _J transitions of Tb³⁺ in YBO₃:Tb were mainly dependent on excitation wavelength. Particularly, the quenching concentrations of ⁵D₄-⁷F _J transitions of Tb³⁺ under 130–290 nm excitation were correlated with excitation bands of YBO₃:Tb. The quenching concentrations of ⁵D₃-⁷F _J transitions remained at low concentration (2%) under 186–290 nm excitation and then increased gradually with energy of incoming excitation photon when excited at 130–186 nm. This dependence should be involved in their excitation mechanisms and quenching pathway in particular excitation region. Supported by the Program for New Century Talents in University of China (NCET, 04-0978) and the Chinese Specialized Research Fund for the Doctoral Program of Higher Education (SRFDP 20040730019)