This paper the role of Cu 2+ concentrations in luminescence quenching of Eu 3+ / Cu 2+ doped ZrO2 nanoparticles synthesized by co-precipitation method. The synthesized Eu 3+ / Cu 2+ doped ZrO2 nanoparticles were observed to have sphere morphology with a diameter of 25 nm. | VNU Journal of Science: Mathematics – Physics, Vol. 35, No. 1 (2019) 70-75 Original article The Role of Cu 2+ Concentration in Luminescence Quenching of Eu 3+ / Cu 2+ Co-doped ZrO2 Nanoparticles Pham Van Huan1, Phuong Dinh Tam1, 2, *, Nguyen Thi Ha Hanh3, Cao Xuan Thang1, Vuong-Hung Pham1, * 1 Advanced Institute for Science and Technology (AIST), Hanoi University of Science and Technology (HUST), )01 Dai Co Viet, Hanoi, Vietnam 2 Faculty of Material Science and Engineering, Phenikaa University, Yen Nghia, Hanoi, Viet Nam 3 School of Chemical Engineering, Hanoi University of Science and Technology (HUST), 01 Dai Co Viet, Hanoi, Vietnam Received 25 January 2019 Revised 20 March 2019; Accepted 21 March 2019 Abstract: This paper the role of Cu 2+ concentrations in luminescence quenching of Eu 3+ / Cu 2+ doped ZrO2 nanoparticles synthesized by co-precipitation method. The synthesized Eu 3+ / Cu 2+ doped ZrO2 nanoparticles were observed to have sphere morphology with a diameter of 25 nm. The XRD patterns of the nanoparticles revealed the peaks that were to be crystalline tetragonal ZrO2. The addition of Cu 2+ to the Eu 3+ doped ZrO2 nanoparticles resulted in a significant suppress luminescence in Eu 3+ / Cu 2+ doped ZrO2 nanoparticles, which was attributed to the spectral overlap occurs between Cu 2+ absorption and Eu 3+ emission (5D0→ 7F2 transition). Keywords: Zirconia; luminescence; precipitation; quenching, nanoparticles. 1. Introduction Zirconia (ZrO2) nanoparticles have received considerable attention in optoelectronic materials because of its high refractive index, optical transparency, corrosion resistance, photothermal stability, high thermal expansion coefficient, low thermal conductivity, high thermomechanical resistance, and catalysis [1, 2]. In addition, the stretching energy of ZrO2 is very low that opens up the possibility of higher efficient luminescence of activator ions incorporated into host ZrO2 matrix [3, 4]. While it .
