Effects of halogen replacement on the efficiency of luminescent solar concentrator based on methylammonium lead halide perovskite

Abstract

Recently, Organic–inorganic hybrid perovskite compounds are at the forefront of research, due to their unique and exciting optical properties, besides the potential applications in photovoltaic systems. Possessing broad absorption spectrum, excellent photoluminescence quantum yields, large Stokes shifts between their absorption and emission bands and thus low self-absorption loss, high stability under illumination and oxygen exposure and tunable emission spectra, through halogen substitution, are advantages of organic–inorganic hybrid perovskites as active media in luminescent solar concentrators (LSCs). In this work, Methylammonium Lead Halide Perovskites (CH3NH3PbX3, X = Cl, Br and I), are investigated as the active medium in planar and bulk form of LSCs. Using spectroscopic and photovoltaic measurements, variation of optical properties and device performance, with different halogen sources in the perovskite based LSC precursors, are monitored. Their superior performance is attributed to the high quantum yield of the Halide Perovskites. The obtained results reveal that to find a suitable condition for effective LSC, it is necessary to investigate the appropriate halogen atom in the synthesized perovskite, as well as the concentration of halide perovskite in LSC. It was found that CH3NH3PbCl3 perovskite, with 2.0 wt% perovskite concentration in Polyvinyl Alcohol (PVA), leads to the highest efficiency, with the least dissipative effect in LSC. The efficiency of coated Si PV cell is increased about 90% more, compared to an uncoated cell.