The positively charged layered gadolinium hydroxide nanosheets were produced by exfoliation in formamide and was applied to fabricate highly transparent and highly luminescent Gd(2)O(3) : Eu layers on quartz glass by simple evaporation and subsequent annealing.

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Transparent Gd 2 O 3 :Eu Phosphor Layer Derived from Exfoliated Layered Gadolinium Hydroxide Nanosheets. -Gd2(OH)5NO3·nH2O and Gd1.90Eu0.10(OH)5NO3·nH2O are synthesized from stoichiometric amounts of Gd2O3 and Eu2O3 dissolved in a small amount of 10% aq. HNO3 solution (autoclave, 150-170°C, 12 h). Transparent Gd2O3:Eu phosphor layers on quartz glass are obtained by exfoliation of the Eu-doped precursor in formamide at room temperature followed by annealing at 600°C for 5 h in air. Under irradiation with 254 nm UV light, the Gd2O3:Eu coated glasses exhibit uniform bright red luminescence. In this way high-quality phosphor layers can be prepared even on large area substrates which is promising for the fabrication of outdoor display devices. -(LEE, K.-H.; LEE, B.-I.; YOU, J.-H.; BYEON*, S.-H.; Chem.