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Effective Yellow Y 3 Al 5 O 12 :Ce 3+ Nanophosphor for Light‐Emitting Diode and Photovoltaic Cell as a Downconverter
Author(s) -
Kang Taewook,
Kang Hyunwoo,
Jeong Hyundon,
Park Jehong,
Kim Taehoon,
Kim Jongsu
Publication year - 2020
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.202000178
Subject(s) - phosphor , materials science , photoluminescence , photovoltaic system , diode , optoelectronics , quantum efficiency , light emitting diode , color rendering index , analytical chemistry (journal) , optics , physics , chemistry , electrical engineering , chromatography , engineering
Yellow Y 3 Al 5 O 12 :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%.