DOI: https://doi.org/10.29363/nanoge.sus-mhp.2022.005
Publication date: 15th November 2022
Lead halide perovskite nanocrystals are widely known for their optoelectronic properties such as outstanding molar absorption coefficients, high photoluminescence quantum yield and narrow band emission. Liquid crystal display industry has been widely introducing quantum dots (CdSe and InP based) in the last years in order to find an advantage against proliferation of OLED technology within more segments (laptops, tablets, tv sets). The usage of quantum dots enabled significant broadening of the color space that could be displayed, as well as improved the overall display brightness compared to OLED. Lead halide perovskites can enable even bigger technological advantages.
Restriction of Hazardous Substances (RoHS) directive introduced by the European Union set a standard, which also influences the display market. In fact Cd concentration in electronic components is limited to 100ppm, whereas In is beeing currently considered to be restricted due to its very high toxicity upon inhalation. Pb is a heavy element known for centuries and deeply studied. Its RoHS limit lies at 1000ppm (10x higher as Cd).
The presentation will show cases where lead halide perovskites can be applied and remain completely RoHS compliant
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