LIGHT EMITTING DEVICE WITH POROUS PHOSPHOR STRUCTURE TO ENHANCE COLOR POINT SHIFT AS A FUNCTION OF DRIVE CURRENT

摘要

Light emitting devices include a light emitting semiconductor diode structure and a phosphor material. The phosphor includes pores, at least one of which contains a fill material. An absolute value of a ratio of a coefficient of thermal expansion of the fill material to a coefficient of thermal expansion of the phosphor material is at least two in an embodiment, at least ten in another embodiment, at least 100 in another embodiment, and at least 1,000 in yet another embodiment.