Abstract
Abstract A single phased color-tunable phosphor via energy transfer has drawn much attention, whereas it is still a question that how to choose a suitable host to realize an efficient energy transfer. In this work, novel single Bi 3+ or Eu 3+ doped and Bi 3+ , Eu 3+ co-activated Ca 2 SnO 4 (CSO) and Sr 2 SnO 4 (SSO) phosphors have been prepared through a high temperature solid state reaction. The energy transfer happening from hosts to Eu 3+ has been confirmed. By co-doping of Bi 3+ , a brighter red light is realized which is attributed to the much more efficient energy transfer from Bi 3+ to Eu 3+ . After comparison, the energy transfer efficiency from Bi 3+ to Eu 3+ is much higher in CSO:Bi 3+ , Eu 3+ than that in SSO:Bi 3+ , Eu 3+ . Furthermore, the experiment reveals that the single-phased color-tunable phosphors exhibit excellent resistance against thermal quenching, suggesting that they can be potential candidates in UV-pumped white light emitting diodes (LEDs).
Published Version
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