MOISTURE-RESISTANT ELECTROLUMINESCENT PHOSPHOR WITH HIGH INITIAL BRIGHTNESS AND METHOD OF MAKING
摘要
An electroluminescent (EL) phosphor is described wherein each individual phosphor particle is encapsulated in an inorganic coating, preferably aluminum oxyhydroxide. The encapsulated phosphor shows an extreme insensitivity to atmospheric moisture and suffers only minor loss of initial brightness in lamps. The method of applying the coating is a hybrid process, which involves EL phosphor particles first being coated with a thin inorganic film using an atomic layer deposition (ALD) method in a fluidized bed wherein the precursors are introduced sequentially in repeated cycles, subsequently followed by an additional coating layer applied by a chemical vapor deposition (CVD) method in which the precursors are introduced simultaneously.
申请公布号
WO2007087479(A2)
申请公布日期
2007.08.02
申请号
WO2007US60538
申请日期
2007.01.15
申请人
OSRAM SYLVANIA INC.;FAN, CHEN-WEN;DANG, TUAN;COVELESKIE, JOAN;SCHWAB, FRANK;BENJAMIN, DALE;SHEPPECK, DAVID
发明人
FAN, CHEN-WEN;DANG, TUAN;COVELESKIE, JOAN;SCHWAB, FRANK;BENJAMIN, DALE;SHEPPECK, DAVID