Ultraviolet LED Photoelectric Characteristics And Its Non-Visual Lighting Applications

With the rapid development of semiconductor epitaxy and chip technology,the technology and application of ultraviolet LED have become the research focus of industry.In this paper,the application of near-ultraviolet LED in the field of shoes and leather lighting and building materials is studied.First of all,this paper selects several kinds of LED with near ultraviolet wavelength to test the photoelectric characteristics,to understand and master the changes of luminous flux,electric power,luminous efficiency,emission spectrum and color coordinate of several kinds of near-ultraviolet wavelength LED driven by different forward current I_F.The results show that the luminous flux and electric power increase in a sub-linear trend with the increase of current I_F,while the luminous efficiency decreases.The main reason may be the PN junction defect,non-radiation compound and the junction temperature.Secondly,based on the simple genetic algorithm spectral construction technology,a multi-wavelength composite ultraviolet LED vehicle lamp for shoes and leather industry lighting is designed.The absorption spectrum of the fluorescent pen(invisible pen)used in shoe leather industry was tested.As the target spectrum,the near ultraviolet LED was used to construct and synthesize the target spectrum,the spectrum distribution of a kind of near-ultraviolet LED light source used in shoes and leather lighting was fitted,and the light source sample was developed.The experimental results show that the actual sample lamp has a good matching degree with the target spectrum,and the actual sample lamp has a clear display effect on the invisible pen,which has a good market application value.Finally,a research was conducted on the formaldehyde removal industry in the field of building materials and home improvement,and a small UV LED formaldehyde removal device for board cabinets such as wardrobes and shoe cabinets was developed.The UV-Visible diffuse reflection absorption spectrum of the titanium dioxide photocatalyst(P25 powder)obtained in this study and the UV-Visible diffuse reflection absorption spectrum of the non-metal-doped composite material C-N-P-TiO2 are used as the target spectrum,using multiple wavelengths.The UV LED combination matches the above two kinds of target spectra respectively to obtain the corresponding LED combination ratio.In this study,the UV-visible diffuse reflection absorption spectrum based on titanium dioxide photocatalyst with high matching was used as the target spectrum to fit the spectral distribution as the object of actual sample production.Finally,the actual sample lamp was combined with a photocatalyst device to develop a UV LED formaldehyde removal device.The formaldehyde concentration degradation test was performed on the manufactured formaldehyde removal device,and the results showed that the device had a high formaldehyde degradation rate in the board cabinet of a small space and had a certain market application prospect.