All-Inorganic Spin-Cast Nanoparticle Solar Cells with Non-Selective   Electrodes
  Spin-cast all-inorganic nanoparticle solutions have been used to make a CdTe/CdSe solar cell with an efficiency of up to 2.8% without alumina or calcium buffer layers. The type of junction and non-selective nature of the contacts made to these devices is explored. 
I.E. Anderson, J.D. Olson, L. Yang, S.A. Carter