Graphene versus oxides for transparent e

Due to their combination of good electrical conductivity and optical transparency, Transparent Conducting Oxides (TCOs) are the most common choice as transparent electrodes for optoelectronics applications. In particular, devices such as LEDs, LCDs, touch screens, and solar cells typically employ indium tin oxide. However, indium has some significant drawbacks, including toxicity issues, an increasing rarity due to a combination of relative scarcity and increasing demand, and resulting price increases. Moreover, there is no satisfactory option at the moment for use as a p-type transparent contact. Thus, alternative materials solutions are actively being sought. This review will compare the performance and perspectives of graphene with respect to TCOs for use in transparent conductor applications.