A hybrid perovskite material and a thermochromic photovoltaic cell utilizing the hybrid perovskite material
A method for forming a hybrid perovskite material is described. The method includes mixing of methyl ammonium iodide (CH3NH3I) with lead thiocyanate (Pb(SCN)2) in Dimethyl formamide (DMF) solvent in a molar ratio of n:1 to form a thiocynate doped non-stoichiometric methyl ammonium lead tri-iodide ((CH3NH3)nPbI3-xSCNx). The n in the 5 (CH3NH3)nPbI3-xSCNx is varies between 5 and 6. The thiocyanate doped non-stoichiometric methyl ammonium lead tri-iodide exhibits a thermochromic behavior as well as a photovoltaic behavior when temperature reaches above 45oC. The hybrid perovskite material may be used as an absorber layer in a thermochromic photovoltaic cell.