This lecture introduces the concept of large area electronic materials, focusing on benefits such as lower processing costs and drawbacks like non-uniformity. It covers driving forces like lower cost and equipment scale-up, as well as materials like Transparent Conducting Oxides (TCOs) and their applications. The use of TCOs in touch screens and solar cells is discussed, along with challenges related to transparency-conductivity trade-offs, carrier density limits, and defects affecting device performance.