Fig. 1: Summary of the three generations of OLEDs investigated.
From: 245 MHz bandwidth organic light-emitting diodes used in a gigabit optical wireless data link
a Chemical structure of the emitter molecules used. b Cross section of OLEDs. ETL electron transport layer, HTL hole transport layer, EML emission layer, HBL hole blocking layer, EBL electron blocking layer. c Schematic illustrations of the top view of the OLEDs. Purple arrows indicate the contacts for anode (A) and blue arrows indicate the contacts for cathode (K). d Photographs of the OLEDs and corresponding images under a microscope of devices emitting blue light.
