Theoretical advantages of pn+-type Cu2S-ZnO solar cell
New developments in Cu2S thin-film technology allow, in principle, the combination of Cu2S with semiconductors other than CdS or Cd1−xZnxS for solar cell purposes. We discuss here a pn+-type Cu2S-ZnO structure that offers some basic advantages over existing structures. Our analysis predicts a practically achievable efficiency of 17.8%.