Hydroxyapatite (HAP) was doped with europium ions Eu3+, and the effect of codoping ions Dy3+, Y3+ and B3+ on its luminescent properties was studied in order to obtain hydroxyapatite with a high luminescence yield in the visible spectrum range. The photoluminescence spectra of the following codoped hydroxyapatites were studied: HAP:Eu,Dy, HAP:Eu,B, HAP:Eu,Y. Codoping with the Y3+, B3+ ions was found to drastically change the HAP:Eu photoluminescence spectrum. In the HAP:Eu,B and HAP:Eu,Y spectra there appeared a wide intense photoluminescence band with the maxima at wavelengths λ=515 and 520 nm, respectively; the band was characteristic of europium ions Eu2+. Keywords: hydroxyapatite, rare earth elements, annealing, doping, luminescence spectra.
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