New Nd ~ (3 +) doped inorganic near-infrared light-emitting materials, preparation and luminescent properties

Title: New Nd ~ (3 +) doped inorganic near-infrared light-emitting materials, preparation and luminescent properties Author: Wan Chui Ming Degree-granting unit: Jinan University Keywords: near-infrared light;; energy transfer;; phosphor;; Ca_2BO_3Cl;; alkaline earth chloride silicate;; compound phosphate Summary: Nd3 +-doped rare-earth near-infrared light with a large penetration depth, line width, background and other characteristics, such as markers in biological analysis has important application prospect. The major bottleneck in the application of its relatively weak near-infrared light intensity. By sensitized Nd3 + ions and energy transfer between near-infrared light to increase its strength in important ways. Eu2 + has the 4f → 5d electric dipole allowed transitions, can efficiently absorb the excitation light energy, and may transfer energy to the Nd3 + ion and sensitized luminescence. Magnetic lifter This commitment to research Eu2 + sensitization of new and efficient near-infrared Nd3 +-doped Eu2 + luminescent materials and to explore the near-infrared luminescence of Nd3 + energy transfer mechanism. Specific experiments are: High temperature solid phase prepared Ca2BO3Cl: Eu2 +, Nd3 + near-infrared light-emitting materials, the results show, Eu2 + incorporation can improve the Nd3 + near-infrared light intensity, Eu2 +, Nd3 + doping amount were 0.03,0.05, the near-infrared light the strongest. Proof of Eu2 + by non-radiation energy transfer to Nd3 + to effectively transfer the energy of the near-infrared Nd3 + have a good sensitization. High temperature solid phase prepared Ca3SiO4Cl2: Eu2 +, Nd3 +, Ca8Mg (SiO4) 4Cl2: Eu2 +, Nd3 + luminescence materials found Eu2 + on the near-infrared light-emitting Nd3 + exists sensitization. Studied the Eu2 +, Nd3 + doping concentration on the near-infrared luminescence properties and the variation of relative intensity. Examined the calcination temperature, calcination time on the near-infrared light-emitting properties. In Ca8Mg (SiO4) 4Cl2: Eu2 +, Nd3 + system, the sample of near-infrared emission intensity of Eu2 + doped with increasing concentration of the first enhanced and then decreased, Eu2 + doping amount of 0.08, the strongest near-infrared light; Nd3 + doping concentration of 0.10, the strongest near-infrared light. Sample calcination temperature of 1100 ℃ in the calcined 3h, the strongest near-infrared light. Analysis of the Eu2 + and Nd3 + between the energy transfer mechanism: Eu2 + with 4f → 5d transition track, can effectively absorb the energy, and energy transfer to Nd3 + energy levels, the occurrence of energy transfer, enhanced Nd3 + near-infrared light. High temperature solid phase prepared Sr4Si3O8Cl4: 0.08Eu2 +, 0.08Nd3 + light-emitting materials and found that the system of Eu2 + to the Nd3 + near-infrared light exists sensitization, near-infrared luminescence intensity increased by 10 http://www.999magnet.com/products/131-magnetic-lifter times, Eu2 + to Nd3 + energy transfer efficiency of 19.7%. Studied the Ca, Mg-doped Sr4Si3O8Cl4: 0.08Eu2 +, 0.08Nd3 + series light-emitting materials, with the Ca content increases, the sample of near-infrared light show a gradual increase trend. Samples of near-infrared luminescence intensity increased with the Mg content showed a gradual weakening of the trend. Prepared by solid-phase LiSrPO4: Eu2 +, LiCaPO4: Eu2 +, KCaPO4: Eu2 +, NaCaPO4: Eu2 + series of highly efficient blue, green phosphor, the phosphor to optimize the preparation conditions. Among them, studies have shown that LiSrPO4: Eu2 + doping amount of change as there are different luminescence centers; LiCaPO4: Eu2 + is a new and efficient blue phosphor; a small amount of Y3 + doping can improve KCaPO4: Eu2 + phosphor luminescence intensity. Further study of the LiSrPO4: Eu2 +, Nd3 +, LiCaPO4: Eu2 +, Nd3 +, KCaPO4: Eu2 +, Nd3 +, NaCaPO4: Eu2 +, Nd3 + near-infrared light-emitting materials, influences of different Eu2 + emission wavelength of the Nd3 + near-infrared light-sensitized effect; systematic study the calcination temperature, calcination time, doping and other factors on the NaCaP04: Eu2 +, Nd3 + system, the impact of near-infrared light-emitting materials, analysis of the ABP04 system Eu2 +-Nd3 + energy transfer mechanism between. Degree Year: 2010