Monthly Archives - 五月 2019

Inkjet printing luminous film instructions

Inkjet printing luminous film (luminous paper, luminous photo printing film) Is a new generation of luminous digital output material, high resolution can be directly printed photos. This product has been tested by the relevant departments of the state, and it is non-radioactive, non-toxic and harmless. It is the only green energy-saving high-tech product that can emit light at night and display its contents without consuming electricity. After 5-15 minutes of visible light, the product can spontaneously light in the dark for [...]

Luminescence mechanism of long afterglow luminescent materials

Hole transport model For this type of material, the earliest model was the hole transport model proposed by Matsuzawa et al. in the SrAl2O4:Eu, Dy system. Based on this model, Matsuzawa believes that in the long afterglow materials SrAl2O4:Eu, Dy, Eu is the electron capture center and Dy is the hole trapping center. When the material is excited by UV, Eu can capture electrons to become Eu, and the resulting holes are captured by Dy through the valence band to [...]

Luminous powder silica coating modification treatment

Water-based luminescent powder is modified by silica cladding on SrAl2O4: Eu2+ and Dy3+ long afterglow luminescent powder by chemical precipitation method, which can effectively improve the water resistance of luminescent powder, but has little effect on the long afterglow luminescence characteristics of luminescent powder. Emulsion paint with modified luminescent powder has the advantages of storage stability and good water resistance. Luminescence performance before and after modification of luminescent powder: the peak types and peak positions of the excitation and [...]