Plasmonically Enhanced Perovskite Quantum Dot Based Luminescent Solar Concentrators*

Luminescent solar concentrators (LSCs) are attractive alternatives to solar energy harvesting, especially as they can capture both direct and diffuse sunlight. However, LSCs experience losses in efficiency with increasing size. To reduce these losses, plasmonic nanoparticles have been incorporated into quantum dot and dye based LSCs to enhance absorption, photoluminescence (PL) and efficiency, with varying degrees of success. Perovskite quantum dots (PQDs) are great candidates for LSCs due to their high absorption coefficient, high PL quantum yield and facile incorporation into planar structures. In this talk, we present a systematic study of CH₃NH₃PbBr₃ PQDs incorporated with 5 and 10 nm gold nanoparticles (AuNPs) in LSCs. We fabricate both small scale (1.5 cm x 1.5 cm x 0.2 cm) and large scale LSCs (10 cm x 10 cm x 0.2 cm) via a dip coating technique and demonstrate low self-absorption losses despite a small Stokes Shift. Our devices exhibit optical efficiencies of 68% (small-scale) and 2.87% (the large-scale), which compare most favorably with previously tested, similarly scaled silicon quantum dot LSCs (2.86%).