Facile in situ synthesis of zeolite-encapsulating Cs₂SiF₆:Mn⁴⁺ for application in WLEDs

Stability test shows that the luminous efficiency of WLED with CSFM-Y reduces only 4% after duration of 120 h in the testing condition of high humidity (85%) and high temperature (85 °C), while the one with pure CSFM declines 28%.