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 gm. The value of the absolute fluorescence quantum yield (Phi(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 mu m. The values of open-circuit voltage (V-oc), short-circuit current density (J(sc)), fill factor (FF), and overall power conversion efficiency (eta) are 0.51 V, 29.47 mA/cm(2), 65.54%, and 9.85%, respectively, for the PMMA/DCITB thin-film LSCs with a thickness of 4.00 mu m. (C) 2015 Elsevier Ltd. All rights reserved.