Organic electronic devices (OLED)
Thien-Phap NGUYEN
Organic light emitting diodes (LEDs) now appear as a promising application of conjugated polymers. Indeed, the use of polymers or organic materials as active layer in the LEDs makes it possible to obtain specific properties inaccessible to inorganic LEDs: low mass, flexibility, large active area, high luminosity.
We realize the light-emitting diodes based on polymer and organic material and study the different physico-chemical phenomena involved in the operation of LEDs: characterization of active materials, conduction mechanisms in devices, role of interfaces in charge injections , Structure of these interfaces, and degradation phenomena. Based on the knowledge gained from these studies, we design strategies for improving the performance of diodes and apply them to the study of devices using new materials and new structures. On the one hand, a better understanding of the functioning of the diodes has been gained by the appropriate characterization methods (trapping, conduction, degradation.) On the other hand, improvements in the performance of the devices have been achieved. Characterization and electrical analysis of organic semiconductors to model the conduction and transport processes in the studied electronic devices.