Crossrelaxations and non-radiative energy transfer from (4G5/2) Sm3+ → (5D0) Eu3+: B2O3-ZnO glasses

The energy transfer process occurring from Sm3+ to Eu3+ in B2O3-ZnO (BZn) glasses is analyzed. Based on the Foster-Dexter theory, the possibility of energy transfer between Sm3+ and Eu3+ has been demonstrated from the spectral overlap of Eu3+ absorption and Sm3+ emission, photoluminescence spectra, energy level diagram and lifetime measurements. The energy transfer mechanism in (Sm3+ + Eu3+) co-doped glass is governed by dipole-dipole interaction.120