Observations open door to improved luminous efficiency of organic LEDs

Scientists succeeded in directly observing how LECs -- which are attracting attention as one of the post-organic LEDs -- change their electronic state over time during field emission by measuring their optical absorption via lamp light irradiation for the first time. 

A research team led by Professor Katsuichi Kanemoto from the Graduate School of Science and the Nambu Yoichiro Institute of Theoretical and Experimental Physics at Osaka Metropolitan University, has successfully observed changes in the electronic state of LECs over time during field emission, by measuring their optical absorption via lamp light irradiation for the first time.

Their findings were published in Nature Communications where it was selected for the Editors' Highlights.

This research method can be applied to all light-emitting devices, including not only LECs but also organic LEDs. This method is expected to reveal detailed electroluminescence processes and lead to the early detection of factors that reduce the efficiency of electroluminescence.