Photoluminescence property of Lu2Si2O7:Ce3+ powder for scintillator

초록

In this paper, cerium doped lutetium pyrosilicate (LPS) powders with cerium content (0.05 and 0.07 mol%) were prepared by sol-gel process. The formation of lutetium pyrosilicate (LPS) phase was confirmed by XRD analysis for the powders heated at 1,200°C; in these powders, a single phase of Lu<inf>2</inf>Si<inf>2</inf>O<inf>7</inf> (LPS) was observed. Cerium doped lutetium pyrosilicate (LPS) powder was agglomerated and constituted of small spherical particles with diameters of about 300 nm. The photoluminescence spectra of the Lu<inf>2</inf>Si<inf>2</inf>O<inf>7</inf>:Ce3+ powders showed the characteristic of excitation and there was an emission spectrum for Ce3+ in the host of Lu<inf>2</inf>Si<inf>2</inf>O<inf>7</inf>. The emission spectrum shows a broad band in the range of 350-525 nm; the broad wavelength on the right side of the spectra should be ascribed to the same 5d-4f transitions of Ce3+, as in the case of cerium doped Lu<inf>2</inf>Si<inf>2</inf>O<inf>7</inf> single crystals. © Materials Research Society of Korea, All rights reserved.

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