Optical characterization and photo-electrical measurement of luminescent solar concentrators based on perovskite quantum dots integrated into the thiol-ene polymer

Abstract

The luminescent solar concentrator (LSC) has attracted worldwide attention as a sunlight manager for harvesting solar energy in building integrated photovoltaic structures. However, until now the relatively low optical efficiency (ηopt) still severely hinders the advancement of the LSCs. In this work, we report the perovskite quantum dots (QDs) integrated into the thiol-ene polymer for LSC applications. After encapsulated by the thiol-ene polymer, the CsPbBr3 QDs exhibit a slight blue-shift of the PL peak position and increasing FWHM because of the dielectric screen effect. With the different QDs' concentrations from 8.3 × 10−3 to 2.5 × 10−2 mg/ml, the LSC performance is evaluated by the direct optical characterization and the indirect photo-electrical measurement in detail. After coupling the PV cells, the as-fabricated LSC shows the optimal optical efficiency of 2.11% and the power conversion efficiency of 1.06%.

Highly efficient multifunctional frosted luminescent solar concentrators with zero-energy nightscape lighting

“…Only a subtle emission peak shift at approximately 4 nm was detected, which is ascribed to the different refractive indices between the thiol–ene polymer and air. 33 It is worth noting that the FLSCs displayed a strong waveguiding effect as indicated by bright green emission emerging from the edge under weak UV irradiation. Fig.…”

Quantifying Mie Scattering in Luminescent Solar Concentrators for Improved Performance

“…The quantified method for η PL,LSC of LSCs is the same as that for PLQY of phosphors. , As shown in Figure b,c, the perfectly matched result between the simulated η PL,LSC of 76% and the experimental result of 78% indicates that the MCRT simulation considering scattering can accurately predict the PLQY of LSC. In addition, the edge-emission efficiency ( η edge ) defined as follows also can be analyzed by the simulation: ,,, η edge = no . of 0.25em edge 0.25em radiated 0.25em photons no . of 0.25em total 0.25em radiated 0.25em photons = I edge I LSC where I LSC is the integral intensity of the total emission band, and I edge is the integral intensity of the edge-emission band. Figure d,e shows the simulated η edge of 53% fits in well with the experimental η edge of 52%.…”

Two-Dimensional Self-Assembly of Boric Acid-Functionalized Graphene Quantum Dots: Tunable and Superior Optical Properties for Efficient Eco-Friendly Luminescent Solar Concentrators

“…78 We also characterized our LSCs by measuring their optical efficiency, which can be defined as the ratio between the photon numbers collected from the LSC edges and the photon numbers illuminated on the LSC top surface. 79 The optical efficiency (OE) can be determined by a photoelectrical method via coupling to a PV device using this equation η =…”

“…We also characterized our LSCs by measuring their optical efficiency, which can be defined as the ratio between the photon numbers collected from the LSC edges and the photon numbers illuminated on the LSC top surface . The optical efficiency (OE) can be determined by a photoelectrical method via coupling to a PV device using this equation , where I LSC and I PV denoted the short-circuit current collected with and without coupling to LSCs, while G is a geometric factor, which is the ratio between the areas of LSC top surface and all edge surfaces.…”