Highly efficient indoor/outdoor light harvesting luminescent solar concentrator employing aggregation-induced emissive fluorophore

Orange/Red Benzo[1,2-b:4,5-b′]dithiophene 1,1,5,5-Tetraoxide-Based Emitters for Luminescent Solar Concentrators: Effect of Structures on Fluorescence Properties and Device Performances

“…This result suggests that the large Stokes shifts and small spectral overlaps of the BDT-series compounds can indeed be successfully exploited to maximize the device efficiency. The performance of BDT-H2 in terms of η ext is remarkable, appearing superior to those of other organic donor–acceptor fluorophores recently reported both by us and other research groups. ,,,− …”

“…Such arrangement was investigated because it was reported to enhance the bathochromic shift of the emission, while retaining moderate-to-good FQY, at least in less polar solvents. 37 , 38 Furthermore, although non-symmetric emitters have been previously employed in LSCs, 39 − 42 to the best of our knowledge a direct comparison between the performances of devices built with symmetric and non-symmetric analogues, measured under the same conditions, is still missing, probably due to the more complicated synthetic procedures usually required to prepare the latter.…”

“…The performance of BDT-H2 in terms of η ext is remarkable, appearing superior to those of other organic donor–acceptor fluorophores recently reported both by us and other research groups. 16 , 42 , 65 , 67 − 69 …”

“…We also envisioned a second array of compounds based on a non-symmetric structure, in which the same donor groups were introduced only on one side of the molecules, while on the other an additional electron-withdrawing cyanobenzene unit was placed, yielding a D–A–A′ architecture ( BDT-H1,O1,S1 , Figure , right). Such arrangement was investigated because it was reported to enhance the bathochromic shift of the emission, while retaining moderate-to-good FQY, at least in less polar solvents. , Furthermore, although non-symmetric emitters have been previously employed in LSCs, − to the best of our knowledge a direct comparison between the performances of devices built with symmetric and non-symmetric analogues, measured under the same conditions, is still missing, probably due to the more complicated synthetic procedures usually required to prepare the latter.…”

A Direct Arylation Approach for the Preparation of Benzothiadiazole-Based Fluorophores for Application in Luminescent Solar ­Concentrators

“…Preliminary results showed that both compounds had excellent dispersibility in PMMA matrix, and their LSC devices reached external photonic efficiencies close to or above 5.0% (at 1.6 wt.%), which were comparable or superior to those recently obtained with other donor-acceptor type organic fluorophores measured under similar conditions. [27][28][29][30] Therefore, their favorable spectral features, excellent physicochemical properties and simple synthetic procedures make LSCA1-2 derivatives very promising candidates for scaled-up LSC applications.…”