Abstract
This investigation shows new possibilities of gold nanoparticles using for rise of Ln3+ ions luminescence in oxide matrixes at ultraviolet synhrotron’s excitation on example of germanate films doped with Eu and Au. It has been established that formation of gold nanoparticles (AuNPs) in such films leads to the enhancement of the Eu3+ ions luminescence intensity by many times at excitation in broad absorption bands having λmax about 120 and 180 nm. The discovered effect is explained by joint influence of the following factors: (1) rise in the nonbridging oxygen hole centers (NBOHCs) concentration as a result of breakage of the O–Eu bonds in the ≡Ge–O–Eu= bridges by the forming AuNPs; (2) nonradiative transfer of excitations from excitons to these centers; (3) effective sensitization of the Eu3+ ions luminescence by the centers via the charge transfer (CT) state of the O2– + Eu3+ complexes; (4) increase in the optical path of the exciting radiation due to the intensification of light scattering by the AuNPs,...
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