As flexible OLED technology continues to mature, new technologies such as folding screens and in‐screen punching have been widely used in many fields such as mobile phones and portable laptops. Overlapping application of new technologies meets the needs of consumers and provides competitive products for the market, but also puts forward higher requirements for product reliability. In this research, the mechanism of dark spot caused by encapsulate failure in perforated area of foldable display screen in reliability test was systematically studied. Under the action of water vapor and electricity, the K element in the polarizer reacts electrochemically to generate KOH, which further generates K2SiO3 chemically with SiO2 of CVD encapsulation layer, resulting in the expansion of CVD film and encapsulation failure. Water vapor denatures the organic luminescent materials, dark spots appear.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.