Abstract
Hybrid photovoltaic (PV) cells containing CuInS2 quantum dots (CIS QDs) incorporated into organic PV layers were developed through a simple solution process. Four types of such cells were fabricated by blending poly(3-hexylthiophene-2,5-diyl):[6,6]-phenyl C61 butyric acid methyl ester (P3HT:PCBM) and CIS QDs in weight ratios of 1:1:0, 1:1:0.2, 1:1:0.5, and 1:1:1. The hybrid PV cell with CIS QDs exhibited increased light absorption and greater quantum efficiency than the purely organic PV cell. In cell performance tests under an air mass (AM) 1.5 solar simulator, the short-circuit current of the hybrid cells with CIS QDs reached up to 10.12 mA/cm2; the corresponding power conversion efficiency was 2.76%, which was 13% higher than that of purely organic PV cells. This indicates that the CIS QDs function as an additional light absorber encouraging device performance improvement.
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