Abstract
The process of making yellow phosphor CaO: Ce3+, Na+ with a variation of Na+ flux concentration for white LED application surgery lamp has been conducted by solid-state synthesis method. The raw material of Calcium oxide (CaO) used as a matrix, Cerium (IV) oxide (CeO2) as an activator, and Sodium hydrogen carbonate (NaHCO3) as a flux. The raw materials are mixed with composition CaO:Ce3+ , xNa+ (x = 0.0035 M, 0.007 M, and 0.014 M). HEM (High Energy Milling has been used to mix the material according to the exact proportions for a particular chemical reaction a stoichiometric mixture. The material is then burned with a sintering temperature of 1300 C rate 40 C/h for 3 hours. CaO: Ce3+, Na+ phosphor tested its performance by embedding the phosphor produced on the blue InGaN LED chip after it observed the resulting emission. Then the phosphor material produced after sintering was characterized by 3 devices XRD (X-Ray Diffractometer) to investigate the presence of phases, PL (Photoluminescence) flux concentration to investigate energy band gap and phosphor emission spectrum CaO: Ce3+, Na+ with a variation of Na+ flux concentration, and Fourier FTIR (Transform Infrared Spectroscopy). The results showed that the optimum flux concentration of Na+ was 0.007 M by emitting a yellow color spectrum with a wavelength of 503.94 nm
https://www.researchgate.net/publication/333775051_Effect_Of_Na_Concentration_On_Luminescence_Of_Phosphor_CaO_Ce3_Na_For_White_Led_For_Surgery_Lamp_Prepared_By_Solid_State_Synthesis_Method
