“…[1][2][3][4] TCOs have been known and extensively studied for more than 50 years as a result of their wide range of technical applications. These include electrodes in optoelectronic thin film devices, such as organic light emitting diodes (OLEDs), 5,6 organic solar cells (OSCs), 7,8 thin film transistor displays, 9,10 electroluminescent lamps, 11 but also as coatings for energy-efficient windows. 12 Most frequently used doped single-cation TCO materials are indium tin oxide (ITO), zinc oxide (e.g., ZnO:Al, Ga) and fluorine or antimony doped tin oxide.…”