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 ( Φ f ) 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 ( V oc ), short-circuit current density ( J sc ), fill factor ( FF ), and overall power conversion efficiency ( η ) are 0.51   V, 29.47   mA/cm 2 , 65.54%, and 9.85%, respectively, for the PMMA/DCJTB thin-film LSCs with a thickness of 4.00   μm.