Mhlongo, Gugu HDhlamini, MSSwart, HCNtwaeaborwa, OMHillie, KT2012-03-022012-03-022011-08Mhlongo, GH, Dhlamini, MS, Swart, HC, Ntwaeaborwa, OM and Hillie, KT. 2011. Dependence of photoluminescence (PL) emission intensity on Eu3+ and ZnO concentrations in Y2O3:Eu3+ and ZnO·Y2O3:Eu3+ nanophosphors. Optical Materials, vol. 33(10), pp 1495-14990925-3467http://www.sciencedirect.com/science/article/pii/S0925346711001303http://hdl.handle.net/10204/5624Copyright: 2011 Elsevier. This is an ABSTRACT ONLY.Y2O3:Eu3+ and ZnO·Y2O3:Eu3+ nanophosphor powders with different concentrations of Eu3+ ions were synthesized by a sol–gel method and their luminescence properties were investigated. The red photoluminescence (PL) from Eu3+ ions with the main emission peak at 612 nm was observed to increase with Eu3+ concentration from 0.25 to 0.75 mol% and decreased notably when the concentration was increased to 1 mol%. The decrease in the PL intensity at higher Eu3+ concentrations can be associated with concentration quenching effects. The red emission at 612 nm was shown to increase considerable when ZnO nanoparticles were incorporated in Y2O3:Eu3+ while green emission from ZnO was suppressed. The increase is attributed to energy transfer from ZnO to Eu3+.enPhosphorsConcentration quenching effectEnergy transferArticleMhlongo, G. H., Dhlamini, M., Swart, H., Ntwaeaborwa, O., & Hillie, K. (2011). Dependence of photoluminescence (PL) emission intensity on Eu3+ and ZnO concentrations in Y2O3:Eu3+ and ZnO·Y2O3:Eu3+ nanophosphors. http://hdl.handle.net/10204/5624Mhlongo, Gugu H, MS Dhlamini, HC Swart, OM Ntwaeaborwa, and KT Hillie "Dependence of photoluminescence (PL) emission intensity on Eu3+ and ZnO concentrations in Y2O3:Eu3+ and ZnO·Y2O3:Eu3+ nanophosphors." (2011) http://hdl.handle.net/10204/5624Mhlongo GH, Dhlamini M, Swart H, Ntwaeaborwa O, Hillie K. Dependence of photoluminescence (PL) emission intensity on Eu3+ and ZnO concentrations in Y2O3:Eu3+ and ZnO·Y2O3:Eu3+ nanophosphors. 2011; http://hdl.handle.net/10204/5624.TY - Article AU - Mhlongo, Gugu H AU - Dhlamini, MS AU - Swart, HC AU - Ntwaeaborwa, OM AU - Hillie, KT AB - Y2O3:Eu3+ and ZnO·Y2O3:Eu3+ nanophosphor powders with different concentrations of Eu3+ ions were synthesized by a sol–gel method and their luminescence properties were investigated. The red photoluminescence (PL) from Eu3+ ions with the main emission peak at 612 nm was observed to increase with Eu3+ concentration from 0.25 to 0.75 mol% and decreased notably when the concentration was increased to 1 mol%. The decrease in the PL intensity at higher Eu3+ concentrations can be associated with concentration quenching effects. The red emission at 612 nm was shown to increase considerable when ZnO nanoparticles were incorporated in Y2O3:Eu3+ while green emission from ZnO was suppressed. The increase is attributed to energy transfer from ZnO to Eu3+. DA - 2011-08 DB - ResearchSpace DP - CSIR KW - Phosphors KW - Concentration quenching effect KW - Energy transfer LK - https://researchspace.csir.co.za PY - 2011 SM - 0925-3467 T1 - Dependence of photoluminescence (PL) emission intensity on Eu3+ and ZnO concentrations in Y2O3:Eu3+ and ZnO·Y2O3:Eu3+ nanophosphors TI - Dependence of photoluminescence (PL) emission intensity on Eu3+ and ZnO concentrations in Y2O3:Eu3+ and ZnO·Y2O3:Eu3+ nanophosphors UR - http://hdl.handle.net/10204/5624 ER -