Processes of energy migration in mixed europium-lanthanum magnesium borate nanocrystals

摘要

Processes of excitation energy migration in europium magnesium borate nanocrystals at different concentrations of neodymium and lanthanum ions were investigated by steady-state and time-resolved luminescence spectroscopy. Energy migration in neodymium doped mixed europium-lanthanum magnesium borate nanocrystals is well fitted by approximate to t(0.33) dependence indicating one-dimensional transport to neodymium energy acceptors through europium chains. Variation of neodymium and lanthanum concentrations have shown that at room temperature excitation can migrate over the distances up to 100nm that is comparable with the size of nanocrystal.