Improving the Luminescence Performance of Quantum Dot Masterbatch to Optimize the White Light Emission of Diffuser Plate

Quantum dots (QDs) exhibit exceptional optical qualities, including wide excitation wavelength, small full width at half maximum (FWHM), and photobleaching resistance. It had been used to make color-converting diffusers for backlight modules. In this study, the QDs were added into masterbatches to prepare composite components with the functions of diffusion and color conversion. Using a coextrusion approach, masterbatches were made by adding suitable ratio of red and green QDs as color conversion materials in polystyrene (PS), silicone difussion powder as the light diffusing agent, and adding antioxidants to improve the service life of the masterbatch. After that, the QD color masterbatch with uniform dispersion, controllable concentration and good luminescence performance was obtained. A spectrometer was used to examine the photoluminescence performance of the created masterbatches in order to validate their luminescence performance. As a result, the use of QDs masterbatches is a viable option for the application of high performance QD display device.