Abstract
This paper proposes a simple and feasible surface modification method to suppress the moisture-induced degradation of the green-emitting phosphor Ba2SiO4:Eu2+ (BSO:Eu2+), which hits its reliability very hard and restricts its wide commercialization in WLEDs. A hydrophobic surface layer was formed on the surface of this phosphor via hydrolysis and polymerization of tetraethylorthosilicate (TEOS) and polydimethylsiloxane (PDMS). The produced surface layer consisted of an amorphous silicon dioxide with a thickness of ∼2nm along with the presence of −CH3 groups on the surface. The modified phosphor featured superior stability in high-pressure water steam conditions at 150°C.
Published Version
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