研究目的
Investigating the development of a novel backlight system for liquid crystal displays that combines blue and red emissive LEDs with perovskite quantum dots embedded composite films to achieve a wide color gamut and solve the motion tailing problem.
研究成果
The hybrid backlight system with dual LEDs and green emissive perovskite QDs applied in LCD achieves a color gamut up to 95% BT.2020 and solves the motion tailing problem in dynamic dimming display devices. This prototype facilitates the commercialization of perovskite QDs.
研究不足
The poor stability of perovskite QDs under high humidity and heat environment and the need for improved PLQY of red emissive perovskite QDs. The hybrid backlight system requires a power supply to simultaneously control two LEDs with different emission, considering different voltage drivers and light decay curves.
1：Experimental Design and Method Selection:
The study combines blue and red emissive LEDs with perovskite quantum dots embedded composite films as color converters.
2：Sample Selection and Data Sources:
Uses perovskite quantum dots with a Pb content of 50 ppm, much lower than the RoHS requirement.
3：List of Experimental Equipment and Materials:
Includes blue and red LEDs, perovskite quantum dots, and K2SiF6:Mn4+ phosphors.
4：Experimental Procedures and Operational Workflow:
Describes the integration of green emissive perovskite QDs into the backlight by adopting a novel solution and adjusting film thickness, QDs concentration, and the proportion of KSF phosphor in blue LEDs.
5：Data Analysis Methods:
Compares the performance of the hybrid backlight system with other QD based LCD devices in terms of luminous efficiency and color gamut.
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