Mixed halide perovskite-based luminescent solar concentrator with high efficiency

Abstract

Organic-Inorganic hybrids with adjustable photoluminescence, high efficacy, and good thermal stability, achieved through organic and inorganic materials, are potentially useful materials for luminescent solar concentrators (LSCs). There is currently significant interest in generating mixed halide Organic-Inorganic hybrids that emit a strong fluorescence ranging from green to red. The aim of this study is to produce LSCs by synthesis and investigation of new derivatives of mixed halide perovskites, including CH3NH3Pb(Br1−xClx)3, CH3NH3Pb(I1−xBrx)3 and CH3NH3PbI3. A major problematic loss mechanism that affects the efficiency of LSCs is the reabsorption of the emitted light by the luminophores. By altering the halogen atoms present in mixed halide perovskites, their absorption and emission wavelengths can be tuned, making them a potential solution to enhance the optical properties of luminescent solar concentrators. Additionally, the large Stokes shift observed in these materials can further contribute to improving the performance of LSCs. Also, the LSC performance was evaluated by a thorough optical and photovoltaic characterization. The findings of this study indicate that identifying the appropriate halogen atom for the synthesized perovskite structures, as well as determining the suitable concentration of the hybrids used in the LSCs, are crucial factors in achieving an efficient LSC system. It was found that CH3NH3PbBrCl2, hybrid perovskite, with 7.5 wt.% concentration in Polyvinyl Alcohol (PVA), results in the most efficient LSC with minimal reabsorption effects. The efficiency of the coated Si PV cell is increased by about 58% compared to an uncoated cell.