Novel solid yellow fluorescent powder

Abstract

The invention discloses a novel solid yellow fluorescent powder. A preparation method comprises the following steps: adding 3 grams of analytic pure hexamethylenetetramine into 27 grams of distilled water for mixing, thereby preparing an aqueous solution, pouring the aqueous solution into a stainless steel reaction kettle with a polytetrafluoroethylene liner, adding 1 gram of polycarbonate powder, tightly covering the reaction kettle with a cover, placing the reaction kettle into a thermostat for heating, performing natural cooling after heating is completed, pouring into a flask, then obtaining yellow turbid liquid, and standing the yellow turbid liquid, thereby obtaining yellow precipitates; continuously adding the yellow precipitates into distilled water for filtering, removing soluble parts attached to the surface, and finally when the solution is clarified, drying the yellow precipitates, thereby obtaining yellow powder which is the solid yellow fluorescent powder. The prepared solid yellow fluorescent powder does not contain heavy metals, is easy and convenient to prepare and can realize white light emission under excitation of a blue light LED; the quantum yield is relatively high, and no pollution is caused.

Description

technical field [0001] The invention relates to the technical field of fluorescent powder, in particular to a novel solid yellow fluorescent powder. Background technique [0002] In my country, the application of yellow phosphor powder in white light-emitting diodes (Lighting Emitting Diode, referred to as LED) has always dominated the market, but its patent belongs to Nichia Chemical Corporation (Japan). To its patent containment. To take the initiative in the world white LED market and break through the international patent blockade of yellow phosphors, the key is that my country needs to make breakthroughs in the research of new materials for yellow phosphors. If we can make a breakthrough in yellow phosphor, it will break the international patent blockade and monopoly of white LED yellow phosphor, and help improve the international competitiveness of my country's semiconductor lighting industry. Therefore, it is of great significance to carry out basic research on the a...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, semiconductor quantum dots or phosphors containing transition metals are used, which contain heavy metals, which are highly toxic and expensive, and will cause pollution during the mining and smelting process, resulting in waste of resources. Rare metals are non-renewable energy sources

As a fluorescent material, liquid yellow organic reagents are not compatible with traditional processes, and are prone to fading, resulting in poor white luminous quality over time