Graphene: Transparent, flexible solar cells

Researchers develop a novel technique using graphene to create solar cells they can mount on surfaces ranging from glass to plastic to paper and tape, but we need to improve the efficiency of their graphene-based organic solar cells without sacrificing transparency. (Increasing the amount of active area would push up the PCE, but transparency would drop.) According to some calculations, the maximum theoretical PCE achievable at their current level of transparency is 10 percent.