Effective Yellow Y3Al5O12:Ce3+ Nanophosphor for Light‐Emitting Diode and Photovoltaic Cell as a Downconverter. Issue 20 (2nd September 2020) - Kang, Taewook
Abstract : Yellow Y3 Al5 O12 :Ce 3+ (YAG:Ce) nanophosphors are prepared through a coprecipitation method. The optimal one shows a single phase, with a particle size of less than 50 nm and the broad photoluminescence (PL) spectra with a maximum peak at 560 nm. Its best quantum efficiency of 65% is achieved, and its lumen maintenance at 200 °C approaches 76%, which is comparable with that of a commercial bulk phosphor. Its applications to white light‐emitting diode (LED) and photovoltaic cell as downconverter are demonstrated. The white LED with the nanophosphor shows higher color rendering index (79) than that of the bulk (74). The significant photovoltaic efficiency is enhanced from 17.2% to 19.1%. Abstract : The yellow Y3 Al5 O12 :Ce 3+ (YAG:Ce) nanophosphors act as a two‐way downconverter in white light‐emitting diode (LED) and solar cell. They show the blue absorption and yellow emission with a quantum efficiency of 65% in the nanoscale regime. They result in the enhancement in the color rendering index of white LED, and the conversion efficiency of solar cell.