Abstract
In this work, we study hybrid solar cells based on blends of the semiconducting polymer poly(3-octylthiophene-2,5-diyl)(P3OT) and [6,6]-phenyl C61 butyric acid methyl (PCBM) coated titanium dioxide (TiO2) nanocrystal film. The Fourier transform infrared spectra (FTIR), UV–vis absorption spectra and PL quenching researches show that the films had a stronger absorption in visible light range. The influence of the PCBM:P3OT ratio were researched and the optimized ratio of PCBM to P3OT (1:1.5) exhibit a short circuit current of 4.42mAcm−2, an open circuit voltage of 0.81V, a fill factor of 0.73 and a light-to-electric conversion efficiency of 2.61% under a simulated solar light irradiation of 100mWcm−2.
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