a mn 4+ Ion-doped red phosphor, preparation method and application

Abstract

The invention discloses a Mn<4+> ion-doped red phosphor, and a preparation method and an application thereof. The general chemical formula of the phosphor is Cs3Ge2Sb3O13:xMn<4+>, wherein x is the molar ratio of doped Mn<4+>, and x is not less than 0.0005 and not more than 0.015. The above material prepared in the invention is responsive in a blue light, near ultraviolet light or ultraviolet lightwavelength range, emits red fluorescence in a wavelength range of 620-750 nm, and can be used to substitute a traditional rare earth-doped red light source; and the excitation spectrum range of the phosphor is wide, strong absorption exists in 355 nm, and the excitation spectrum range is consistent to the luminescence waveband of a commercial ultraviolet-blue light chip. The preparation method ofthe phosphor is simple; and compared with rare earth phosphor, the phosphor disclosed in the invention has the characteristics of wide selectivity of raw materials, and low cost, is a red fluorescentmaterial having a good luminescence performance, and can be used to manufacture near ultraviolet light or blue light excited white LED phosphor.

Description

technical field [0001] The invention belongs to the field of solid fluorescent materials, in particular to a red luminescent material doped with manganese (IV) and a specific obtaining method thereof. The prepared luminescent material can be combined with YAG:Ce, InGaN blue light chips, which can make up for the shortcomings of high color temperature and poor color rendering index of traditional commercial white light LEDs, and can obtain the warm white light that people need. Background technique [0002] While the rapid social development is promoting human civilization, it also intensifies the demand for energy. Before new energy sources are fully developed and utilized, traditional fossil fuels such as oil, coal, natural gas and other primary energy sources are still the energy we obtain from nature. main reliance. However, the abuse of fossil fuels has exacerbated a series of environmental pollution problems such as carbon dioxide emissions and smog. When the living en...

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Problems solved by technology

Doped with rare earth ions Eu 3+ It is the easiest way to obtain a red light source, but it can only be excited in the near ultraviolet (<365 nanometers), which does not match the blue chip InGaN (the excitation area is generally 380~470 nanometers), so it cannot meet the application in WLEDs demand, and rare earth is a kind of strategic resource, and the price is relatively expensive. Therefore, it is urgent to find a low-cost, non-rare earth-doped red phosphor that can be excited by short-wavelength light

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