Light-emitting devices based on in-situ formed p-n junctions
Tomo SAKANOUE1, Taishi TAKENOBU1
There is a growing interest in “iontronics” that use semiconducting materials and electrolytes in single devices. Light-emitting electrochemical cells (LECs) are one of the representatives of such devices whose emitting layers are comprised of semiconducting polymers and electrolytes. Voltage application to LECs rearranges ions in emitting layers and form self-organized p-n homojunctions in semiconductors, so that efficient emission can be expected. However, the materials and operation techniques for controlling two different charges of ions and electrons have not yet been well established. Here, we show our recent LECs in which the electrolyte materials and device structures were carefully designed for efficient rearrangements of ions for electron/hole injection and light emission.
- 1 Department of Applied Physics, Nagoya University