Quantum size effect in the photoluminescence properties of p-type semiconducting transparent CuAlO2 nanoparticles The study of the spectral-luminescence parameters of LaPO 4 -Eu and LaPO 4 -Pr nanoparticles upon excitation by the synchrotron radiation with photon energies 4-40 eV was performed. The differences of the luminescence intensity dependence on the size for LaPO 4 -Eu and LaPO 4 -Pr nanoparticles excited at the range of matrix transparency, the range of band-to-band transitions, and

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... range of electronic excitation multiplication were revealed. The observed regularities are explained in terms of the electron-phonon and electron-electron scattering, surface losses, and exciton diffusion. The ratio between the length of thermalization and electron mean free path and the size of nanoparticle is determinative for the luminescence intensity upon excitation in the range of fundamental absorption of matrix and X-ray excitation. V C 2013 AIP Publishing LLC. [http://dx.[This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to ] IP: 131.169.95.181 On: Tue, 21 Apr 2015 08:41:35 224305-5 Malyy et al.