2results about How to "High spectral purity" patented technology

The utility model discloses a frequency hopping frequency source module based on DDS relates to microwave radio communication technical field, including crystal oscillator, power divider and frequency mixer, and power divider and frequency mixer are connected in parallel through first branch and second branch, and first branch includes FPGA chip, PLL chip, DDS chip and first filter who connects in order series connection, and FPGA chip and power divider first output electric connection, and first filter and frequency mixer first input electric connection, and the second output of FPGA chip and the frequency control input of DDS chip electric connection. The utility model discloses the hardware construction under relevant layout, still makes it have the advantage that the output frequency coverage is wide under the original already having the advantage that the frequency switching speed is fast, and the frequency resolution is high.

This invention proposes a narrow-emission ultraviolet gallium sulfide quantum dot material and its synthesis method, belonging to the field of semiconductor quantum dot material technology. The method employs a one-pot synthesis strategy and introduces a specific passivating agent into the reaction system. By precisely controlling the reaction conditions and the amount of passivating agent, high-purity ultraviolet-emitting gallium sulfide quantum dots with an emission peak at 392 nm and a half-maximum width at half-maximum (HWHM) of 34 nm were successfully prepared. This synthesis method significantly reduces the HWHM of gallium sulfide quantum dots and improves their spectral purity. This invention provides an effective method for preparing ultraviolet environmentally friendly quantum dots with high color purity, demonstrating great application potential in cutting-edge fields such as lighting and full-color displays.