Cover Image, Volume 3, Number 5, October 2021

Front cover image: Carbon-based thermoelectric materials have shown remarkable advancements since the discovery of conducting polymers, carbon allotropes, and most recently, organic-inorganic hybrid halide perovskites. However, power factor is still low compared to state-of-the-art inorganic semiconductors from either Seebeck coefficient or electrical conductivity. In article number 10.1002/cey2.121, a research group by Sang Hyuk Im at Korea University summarizes recent strategies applied on achieve high-thermoelectric performance, such as chemical doping nano-compositing with organic materials. The authors also highlight key studies that successfully demonstrated high-performance flexible devices using share future perspectives carbon-based