In OLEDs which are currently leading the display industry for mobile devices and TVs, blue material is still using fluorescent material unlike red and green.
Currently, a lot of light emitting material companies are trying to improve the efficiency, lifespan, and color purity of blue light emitting materials, also next-generation materials such as phosphorescence, TADF, and hyper-fluorescence as well as actively developing luminous efficiency by controlling emission wavelengths.
Material Science (hereinafter referred to as MS), a Korean company that has been developing blue light emitting materials since 2015, has recently focused on realizing high color purity and successfully developed high color purity blue light emitting materials with a light emission wavelength of 460 nm and a half width of 11 nm. Considering that the emission wavelength of the currently commercially available blue material is about 20 nm, the blue material of MS is expected to receive great attention.
The full width at half maximum (FWHM) is an expression of the extent of function given by the difference between the two extreme values of the independent variable at which the dependent variable is equal to half of its maximum value.
And the narrower the half width, the higher the purity.
A typical example is Samsung Electronics’ QLED TV, which has significantly improved color reproduction by applying a QD sheet to the LCD back light.
The blue light emitting material developed by MS is expected to be applicable not only to fluorescent materials but also to hyper-fluorescence, which is attracting attention as a next-generation blue material according to emission wavelength control.
<Comparison of the half width of the existing blue dopant with the half width of the blue dopant developed by MS, Source: Materials Science>