Abstract
Interface Engineering
In article number 2000293, Kin Shun Wong, Goutam Kumar Dalapati, and co‐workers develop stable and efficient Cu2(Zn0.6Cd0.4)SnS4 (CZCTS) thin film solar cells using a low cost solution‐based method and ultra‐thin cupric oxide (CuO) interface engineering. Power conversion efficiency of 10.77% is achieved for the CZCTS devices with 4 nm cupric oxide interface layer. Incorporating ultra‐thin CuO enhances performance and stability of the device and opens up the opportunity for large scale photovoltaic deployment using earth abundant materials.