Tunable emission with efficient energy transfer in Na2SrSi2O6:Ce3+, Tb3+ phosphor for near-UV LED
Source abstract
Abstract
Abstract Two series of Na2SrSi2O6:Ce3+ and Na2SrSi2O6:Ce3+, Tb3+ phosphors were synthesized via high-temperature solid-state reaction. The obtained Na2SrSi2O6:Ce3+ phosphors exhibit an intense excitation peak at 284 and 360 nm, which was suited to the dominant emission band of a NUV light-emitting-diode (LED) chip. In the Ce3+ single doped system, the critical quench concentration of the phosphor was approximately 4 mol% and a dipole-dipole interaction was verified for the concentration quench mechanism. In addition, Tb3+ ions were introduced as a sensitizer, and the effects of introducing the Tb3+ ions are investigated by measuring the photoluminescence emission and excitation spectra, the PL decay curves, and the quantum efficiencies. Results confirm the occurrence of non-radiative energy transfer from Ce3+ to Tb3+ with an efficiency of over 60%, indicating that the developed phosphor can be used as a potential white-light-emitting phosphor for near-UV LED.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Radiation Detection and Scintillator Technologies · Perovskite Materials and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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