Luminescent solar concentrators with outstanding optical properties by employment of D–A–D quinoxaline fluorophores

Abstract

Luminescent solar concentrators (LSCs) are devices designed to efficiently collect both direct and diffuse solar radiation and concentrate it on photovoltaic cells to foster their use in the building-integrated photovoltaics...

High‐Efficiency Luminescent Solar Concentrators Based on Antifogging and Frost‐Resisting Fluorescent Polymers: Adding Multiple Functions for Sustained Performance

“…This allowed η ext and η int values for QP‐CMA5/C6‐1% LSCs as high as 3.96% and 34.79%, respectively, which are among the highest values recently reported in the literature for devices with equivalent dimensions tested under similar irradiation conditions and doped with luminophores having analogous spectral response. [ 15,42,44,45 ] These results highlight the excellent light‐guiding ability and favorable optical response of our fluorescent system, making it a particularly interesting candidate for the fabrication of high‐performance large‐area LSCs. To validate this hypothesis, Monte Carlo ray‐tracing simulations were performed to predictively model the optical response of QP‐CMA5/C6‐1% LSCs of increasing size (viz., LSC length) in terms of η int and η ext (see inset to Figure 6A).…”

Red‐emitting tetraphenylethylene derivative with aggregation‐induced enhanced emission for luminescent solar concentrators: A combined experimental and density functional theory study

“…The shape of the emission band remained unaltered at different fluorophore concentrations but showed a progressive red‐shift, possibly caused by auto‐absorption phenomena (i.e., inner filter effects). [ 32 ] Notably, SS of more than 130 nm were observed for both TPE‐MRh /PMMA and TPE‐MRh /PCMA films at the lowest fluorophore content. However, the maximum QY values recorded were around 14%–16% and progressively decreased with TPE‐MRh concentration below 10% for PMMA films.…”

“…In PCMA, fluorescence quenching with fluorophore content appeared less pronounced possibly due to better phase compatibility between TPE‐MRh and the polymer matrix, in agreement with recent results. [ 32 ]…”

“…This phenomenon was not attributed to the different Tg of PCMA (104°C, i.e., practically identical to PMMA) but to the lower polarity of the matrix [ 32,33 ] that possibly interacts worse with the glass surface, thus causing film breaking. The lower polarity of PCMA with respect to PMMA was confirmed by water contact angle measurements.…”

“…In PCMA, fluorescence quenching with fluorophore content appeared less pronounced possibly due to better phase compatibility between TPE-MRh and the polymer matrix, in agreement with recent results. [32] TPE-MRh visually showed a good dispersion in the polymer matrices (Figures S20 and S21), which appeared homogenous at a macroscopic level, and with negligible phase separation at the film surface even at the highest fluorophore content. Inspection of fluorescence microscopy images revealed the formation of microscopic emissive particles with a length of less than 25 μm on average.…”