University of Texas at El Paso
Faculty Sponsor's Department(s):
Thin Film Growth of Methylammonium Lead Thiocynite Iodine via Spin-Casting
Hybrid organic-inorganic perovskite photovoltaic (PV) cells have received a great deal of attention in recent years due their high power conversion efficiency (PCE), strong optical absorption and unusually low density of trap states. The most highly-studied of these systems is methylammonium lead iodide (MAPbI3), due to its superior reported PCEs and facile growth techniques. Although progress in MAPbI3 PVs has been unprecedented, there remain many issues that need to be overcome before widespread commercialization of PVs based on this material can be considered. These include stability issues and the use of the toxic element, lead. These shortcomings have forced the community to seek alternatives material systems. In this study, we identify methylammonium lead thiocynite iodine (MAPb(SNC)2I) as a new candidate material for pervoskite solar cells. Initial studies have shown MAPb(SCN)2I to be more stable when tested in humid conditions and exhibiting PCEs similar to MAPbI3. Our focus will be on developing techniques and protocols for deposition of continuous MAPb(SCN)2I films, while studying its crystal structure, optical properties, stability, and power conversion efficiency, with a view to carrying out future studies of electronic devices employing this material.