MolecuLED organic wavelength-conversion film improves display color

June 1, 2019
MolecuLED (MLED) technology uses all-organic, nontoxic materials to shift and optimize the RGB spectra of existing white-light displays for better color gamut.
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Using organic, recyclable materials free of toxic indium and cadmium found in more-expensive quantum-dot color-conversion film technologies, MolecuLED (MLED) technology by StoreDot (Herzliya, Israel) can increase the color gamut of existing LCD displays by as much as 15%. The MolecuLED SC2 single-color-conversion film consists of high-quantum-yield, photostable organic fluorescent molecules with narrow full-width half-maximum (FWHM) spectra embedded in a polymer film.

With a significantly lower fabrication cost than quantum-dot films, the MLED films eliminate the need for both diffuser and barrier films in any LCD display architecture, with minimal impact on illuminance. The SC2 technology improves color gamut of the input white LED backplane illumination by narrowing the green spectrum approximately 20% to around a 55 nm FWHM spectral output and both narrowing (to around 50 nm FWHM) and shifting the orangish-red color center in a red-green-blue (RGB) white LED at <600 nm to a redder color at around 635 nm, effectively increasing the color gamut by 10% to 15%, with relative integrated irradiance power being maintained at 98.1% to 98.9% of the optimal 100% non-SC2 display. StoreDot launched its SC2 single-color-conversion display technology in early 2019 and has plans to release its MC2 multiple-color-conversion film in the near future. Reference:

About the Author

Gail Overton | Senior Editor (2004-2020)

Gail has more than 30 years of engineering, marketing, product management, and editorial experience in the photonics and optical communications industry. Before joining the staff at Laser Focus World in 2004, she held many product management and product marketing roles in the fiber-optics industry, most notably at Hughes (El Segundo, CA), GTE Labs (Waltham, MA), Corning (Corning, NY), Photon Kinetics (Beaverton, OR), and Newport Corporation (Irvine, CA). During her marketing career, Gail published articles in WDM Solutions and Sensors magazine and traveled internationally to conduct product and sales training. Gail received her BS degree in physics, with an emphasis in optics, from San Diego State University in San Diego, CA in May 1986.

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