LG Chem said that a large explosion broke out at their OLED production factory in Heungdeok District in Cheongju, North Chungcheong, Korea on August 24. One 26-years old employee was killed and 14 others were injured. This tragic accident happened when a large 200-liter drum that contained dioxane (a volatile substrate used in the manufacturing process) exploded due to unknown reasons.
The police are now investigating whether this is a case of poor equipment management and improper maintenance by LG Chem. This may also be due to negligence of workers at the factory. LG Chem said that while there's no problem to continue produce OLEDs in the factory, they have decided to stop operation until the investigation is over.
LG Chem is producing electron transport and hole injection materials used in OLED panels, and is also producing OLED lighting panels. The explosion probably took place in the material factory, not in the OLED lighting factory.