Scattering enhanced quantum dots based luminescent solar concentrators by silica microparticles

Recent Developments in Solar Energy-Harvesting Technologies for Building Integration and Distributed Energy Generation

“…Regardless of these fundamental limitations, collecting the photons efficiently at concentrator system edges, from the areas of incidence onto glass located within the range of several times the system thickness remains a valid option, which is demonstrated graphically in [77], in the presence of strong scattering at micron-scale luminophore pigment particles. The relevance of scattering as a short-range photon collection mechanism in LSC is also reported in [19,20] and discussed in [78,95].…”

“…This is because the only long-range (in the absence of glass surface imperfections or strong scattering) photon transport mechanism suitable for trapping the incident light energy within transparent waveguides is total internal reflection (TIR), which itself is enabled by the random directional character of luminescent emissions. The internal structure of LSC-type devices has also undergone rapid development, relying on the advances in areas, such as application-specific thin-film coatings, spectrally-selective transparent diffractive optics [20,77], embedded Mie scattering media [19,78], or other components designed to stimulate partial light trapping within waveguide-type glazing systems. More recently, conventional (non-transparent) PV elements, e.g., silicon or copper indium-gallium selenide (CIGS) cell modules started to merge into the design structure of transparent window-type solar concentrators, blocking a small transparent area fraction, but boosting the electric output through both the direct incident light capture and also collecting a part of light travelling within the device [40,55,[79][80][81].…”

Highly Efficient Luminescent Solar Concentrators Based on Benzoheterodiazole Dyes with Large Stokes Shifts

“…IPCE in far-red/nearinfrared( NIR) region above 600 nm have almostt he same values as the reference (PDMS with no dye). Because of the scattering effectso ft he dye crystals in the PDMS devices, [29][30] the IPCE values of the CS2T and CS2TCHO in the NIR region are highert han the PDMS reference;o nly the sample with 0.004 % w/w CS2T (transparent)h as the same level as the blank ( Figure S15). For Se4T,a lthough the devicel ooks transparentb yn aked-eye, the IPCE values of the concentrated sample (0.020 % w/w)i nt he NIR region are influenced by scattering effects ( Figure S15).…”

Recent Developments in Solar Energy-Harvesting Technologies for Building Integration and Distributed Energy Generation

“…This is because the only long-range (in the absence of glass surface imperfections or strong scattering) photon transport mechanism suitable for trapping the incident light energy within transparent waveguides is total internal reflection (TIR), which itself is enabled by the random directional character of luminescent emissions. The internal structure of LSC-type devices has also undergone rapid development, relying on the advances in areas such as application-specific thin-film coatings, spectrally-selective transparent diffractive optics [20,77], embedded Mie scattering media [19,78], or other components designed to stimulate partial light trapping within waveguide-type glazing systems. More recently, conventional (non-transparent) PV elements, e.g.…”

“…Regardless of these fundamental limitations, collecting efficiently the photons at concentrator system edges, from the areas of incidence onto glass located within the range of several times the system thickness remains a valid option, which has been demonstrated graphically in [77], in the presence of strong scattering at micron-scale luminophore pigment particles. The relevance of scattering as a short-range photon collection mechanism in LSC has also been reported in [19,20], and discussed in [78,95]. The performance limits of luminescent solar concentrators with quantum dots in a selective-reflectorbased optical cavity have been evaluated in [105], where the dependency of the optical concentration on the geometric gain has also been studied.…”