Everyday adhesive tape has been used to create ultra-thin layers for solar cells. The tape was used to make single-atom layers of a phosphorus compound called phosphorene. Previously using adhesive tape to peel away single-atom layers had been used to create graphene. However, ultrathin phosphorene was desirable because it can function as a semiconductor for solar panels and electronics. Traditionally these applications use silicone semiconductors, but phosphorene is thinner and lighter than silicone. In testing, phosphorene also had superior semiconductor properties. The ultra-thin phosphorene could be tuned to better harvest solar energy by adjusting the adhesive technique to vary the thickness of the phosphorene layer.