Conversion of blue light to near infrared emission by Y3Al5O12: Ce3+, Er3+, Ho3+

Abstract

Ho[Formula: see text] single-doped, Ce[Formula: see text]/Ho[Formula: see text] co-doped and Ce[Formula: see text]/Er[Formula: see text]/Ho[Formula: see text] tri-doped Y3Al5O[Formula: see text] (YAG) near infrared (NIR) phosphors were prepared by coprecipitation-melted salt method. The 2090[Formula: see text]nm emission of Ho[Formula: see text] is improved by 2 times in Ce[Formula: see text]/Er[Formula: see text]/Ho[Formula: see text] tri-doped YAG phosphor and by 0.5 times in Ce[Formula: see text]/Ho[Formula: see text] co-doped YAG phosphor, compared with that in Ho[Formula: see text] single-doped YAG phosphor. The improved luminescence at 2090[Formula: see text]nm in Ce[Formula: see text]/Er[Formula: see text]/Ho[Formula: see text] tri-doped YAG phosphor is performed by the Ce[Formula: see text] indirect sensitization. It is estimated that the Ce[Formula: see text] indirect sensitization efficiency is about 64% in the Y[Formula: see text]Al5O[Formula: see text]:0.06Ce, 0.15Er, 0.14Ho sample.