The QD backlighting system is an emerging technology for LCD and lighting devices. It is the QD polymer film or QD coating that converts wavelength of incoming lights. For example in the LCD backlight the part of blue light from conventional LED is converted into pure green and red colors. Then RGB lights go to the LCD matrix and produce a display image. Such QD backlight system brings a wide color gamut, more bright and contrast images. Also it decreases energy consumption significantly. Nowadays, many TV makers adopted this technology, such as Sony, Samsung and LG.
QD backlight system can be fabricated as follows. Colloidal Quantum Dots are mixed with polymer solution. The polymer can be PMMA, polyurethane, etc. Then Quantum Dot polymer film is prepared on a suitable substrate. The final Quantum Dot film is used with blue or UV LED to make a backlighting system.
Perovskite quantum dots: L. Protesescu et al. Nanocrystals of Cesium Lead Halide Perovskites (CsPbX3, X = Cl, Br, and I): Novel Optoelectronic Materials Showing Bright Emission with Wide Color Gamut. Nano letters. 2015, 15, 3692–3696; X. Li et al. CsPbX3 Quantum Dots for Lighting and Displays: Room-Temperature Synthesis, Photoluminescence Superiorities, Underlying Origins and White Light-Emitting Diodes. Advanced Functional Materials. 2016, 26, 2435-2445.
CdSe/CdS quantum dots: T-H Kim. Bright and stable quantum dots and their applications in full-color displays. MRS bulletin. 2013, 38, 712-720. B. Huang. “Giant” red and green core/shell quantum dots with high color purity and photostability. Superlattices and Microstructures. 2016, 91, 201-207; G.J. Supran et al. QLEDs for displays and solid-state lighting. MRS Bulletin. 2013, 28, 703-711.