Rossa Mac Ciarnáin*, Hin Wai Mo, Kaori Nagayoshi, Hiroshi Fujimoto, Kentaro Harada, Robert Gehlhaar, Tung Huei Ke, Paul Heremans & Chihaya Adachi*
Advanced Materials (2022)
https://onlinelibrary.wiley.com/doi/full/10.1002/adma.202201409
An accessible method based on a single emission spectrum that enables emission zone measurements with sub-second time resolution in an organic light-emitting diode (OLEDs) is shown. A procedure is introduced to study and control the emission zone of an LED system and correlate it with device performance. A thermally activated delayed fluorescence organic LED emission zone is experimentally measured over all luminescing current densities while varying the device structure and while aging.