A phosphor was synthesized using a decomposition method without the use of toxic gas. and ZnCdS:Ag,Cl phosphors were chosen to produce green and red emissions, respectively, under excitation from a blue light emitting diode (LED). A three band white LED was obtained through a combination of nonabsorbed blue emission from a blue LED and green and red emissions from the and ZnCdS:Ag,Cl phosphors. The optical properties of the three band white LED are also discussed.
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Huh et al. (2003) studied this question.
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