ABSTRACT
This chapter reviews the synthesis and characterization of gadolinium and praseodymium co-doped calcium phosphate phosphors which were evaluated for a possible application in phototherapy lamps for treatment of various skin diseases. Ultraviolet B (UVB) narrowband emission consists only of a wavelength corresponding to the therapeutic range and it therefore has extremely minimal sunburn effects, explaining why it has preference over the UVB broadband in phototherapy lamps. The emission is classified under UVB light and it is suitable for phototherapeutic treatment for skin disease such as hyperbilirubin, vitiligo, and psoriasis. Phototherapy uses radiation from specific wavelengths in the natural spectrum of the sun for treatment of various skin diseases such as psoriasis, vitiligo, and hyperbilirubin. The photoluminescence data were recorded using a Varian Cary Eclipse fluorescence spectrophotometer coupled with a monochromatized 150 W xenon lamp used as an excitation source.
