Europium ion doped light conversion glass and preparation method thereof

Abstract

The invention provides a europium ion doped light conversion glass and a preparation method thereof. According to the europium ion doped light conversion glass, fluorophosphate glass is used as matrixglass, a first rare earth ion is used as an activating ion, CaF2 microcrystals are uniformly dispersed in the fluorophosphate glass, the first rare earth ion is europium ions in a mixed valence state, the europium ions in the mixed valence state comprise a Eu<2+> ion and a Eu<3+> ion, and the atomic ratio of the first rare earth ion to the CaF2 is 0.1-15.0 at.%. The europium ion doped light conversion glass has higher luminous efficiency, can absorb ultraviolet rays with the waveband of 200-400 nm, and can emit blue light and red orange light with the wavelengths of 402-500 nm and 570-725 nm,and the luminous wavelength range is highly matched with the chlorophyll absorption wavelength.

Description

technical field [0001] The invention relates to a glass, in particular to a light-converting glass doped with europium ions and a preparation method thereof. Background technique [0002] At present, my country's agricultural development is facing problems and challenges such as the deterioration of agricultural resources and environment, frequent occurrence of agricultural natural disasters, expansion of agricultural pest damage, and excessive agricultural energy consumption. All the problems indicate that it is imperative to change the traditional farming methods and develop modern and efficient ecological agriculture. Facility agriculture is one of the important symbols of agricultural modernization, and the development of modern greenhouses meets the objective needs of my country's agricultural production development. [0003] The growth and yield of crops are closely related to sunlight, because chlorophyll (chla, chlb) in plant chloroplasts can perform photosynthesis....

AI Technical Summary

Problems solved by technology

Chinese patent CN1332126A discloses a light-converting glass with Eu2+ and Eu3+ as co-activators and borate as a matrix. Although this invention can simultaneously convert ultraviolet light into blue light and red-orange light, it can be seen that the light emission wavelength of rare earth ions and Plant chlorophyll absorption wavelength overlap is small, and the matching is average, which will seriously affect the conversion efficiency

In addition, borate as an oxide matrix has a high phonon energy, which leads to low luminescence efficiency of rare earth ions, which makes its light conversion efficiency low and cannot be used in agricultural greenhouses on a large scale.

Images