Excitation energy transfer between Eu³⁺ and Tm³⁺ ions in zinc phosphate glass

Abstract

Non-radiative energy transfer from Eu³⁺to Tm³⁺has been studied by observing the steady state emission of Eu³⁺ with varying concentration of Tm³⁺in zinc phosphate glass. It has been observed that Eu³⁺ion emission intensity decreases with increasing Tm³⁺ concentration resulting in a non-radiative energy transfer from Eu³⁺ to Tm³⁺ whereas energy transfer from Tm³⁺ to Eu³⁺ was not observed between donor and acceptor ions. This energy transfer has been explained on the basis of cross-relaxation of energy. The energy transfer mechanism and other parameters related to energy transfer between Eu³⁺ and Tm³⁺have been computed.