Design of stable solar cells with >15% efficiency based on 2D perovskites

Project: Research project

Project Details


Hybrid organic-inorganic methylammonium metal halide perovskites, MAPbI3 and FAPbI3, are excellent light absorbing materials for solar cells with power conversion efficiencies (PCE) exceeding 20% in less than a decade (MA=methylammonium; FA=formamidinium).1,2 Their remarkable photo-physical properties place them among the most attractive thin-film photovoltaic (PV) technologies that could potentially approach the Shockley-Queisser limit for a single junction solar cell (~33.5%) under the standard AM1.5G flat-plate solar spectrum.3 Larger gains in PV performance have been achieved by using mixed FA/MA-cation perovskites.. These devices employ mixed FA/MA perovskite formulations in conjunction with mixed anions, their chemical composition being (MAPbBr3)x(FAPbI3)1-x. However, these materials remain prone to decomposition upon exposure to heat and humidity forming inert yellow phases and PbI2. While constantly improving the PCE is important, a critical scientific breakthrough that will determine the fate of perovskite-based materials for photovoltaics and other optoelectronic applications is the demonstration of both environmental- and photo-stability under standard operating conditions. Hence it is important to develop high performing perovskite structures that are stable in both low and high temperature ranges and withstand degradation by water.1,4
Effective start/end date3/1/172/29/20


  • Office of Naval Research (N00014-17-1-2231-P00004)


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