The properties of PMMA/DCJTB thin-film luminescent solar concentrator with various thicknesses

The PMMA/DCJTB thin-film luminescent solar concentrators (LCSs) with various thicknesses have been successfully prepared with the spin coating process. The properties of PMMA/DCJTB thin-film LSCs with various thicknesses have been studied. The cross-sectional field-emission scanning electron microscopy (FESEM) micrographs show that the thin-films on the glass substrate are very smooth. The thicknesses are 1.36 ± 0.03, 1.93 ± 0.07, 2.80 ± 0.05 and 4.00 ± 0.06 μm. The value of the absolute fluorescence quantum yield (Φf) of the as-prepared LSCs decreases from 59.09% to 51.91% when the PMMA/DCJTB thin-film thickness increases from 1.36 to 4.00 μm. The values of open-circuit voltage (Voc), short-circuit current density (Jsc), fill factor (FF), and overall power conversion efficiency (η) are 0.51 V, 29.47 mA/cm2, 65.54%, and 9.85%, respectively, for the PMMA/DCJTB thin-film LSCs with a thickness of 4.00 μm.