Image (IMAGE) University of Tsukuba Caption University of Tsukuba researchers used time-resolved photoelectron emission microscopy (TR-PEEM) to probe the exciton dynamics of thermally activated delayed fluorescence organic light-emitting diodes (TADF-OLEDs). TADF-OLEDs based on solid-state substrates have significant potential for use in display technology owing to their high efficiency; however, their electron dynamics are not well understood. The TR-PEEM method showed electron accumulation that indicated exciton dissociation. It is hoped that the findings will contribute to advances in OLED displays. Credit University of Tsukuba Usage Restrictions Unauthorized use is prohibited License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.