2 to 1.0 M), the fibrous structure grew with a thickness of 300 to 600 nm and a maze-like structure. Fibrous structures have more effective surface area than smooth surface; ZnO fibrous structure is expected to be used in photovoltaic devices. For the photoluminescence aspect, the UV and green-yellow PL intensities
increase with increasing concentration of precursor from 0.2 to 1.0 M. The UV-visible spectra studies show that a rapid STA-9090 nmr increase of intensity at the whole wavelength area was observed. Especially, intensity at the ultraviolet area increased rapidly. The external quantum efficiency of the device was improved at the whole wavelength. The performance characteristics of polymer BHJ photovoltaic cells using ZnO fiber film as a hole-conducting layer and a P3HT:ICBA blended active layer have been investigated. As the concentration of Zn2+ precursors
increased from 0.2 to 0.6 M, V oc, J sc, and PCE increased. This improvement can AZD1480 price be explained by an increased charge carrier mobility of holes and electrons. However, as the concentration of Zn2+ precursor reached 0.8 M, all values of the characteristic parameters decreased. The polymer photovoltaic cells with the structure ITO/PEDOT:PSS (180°C for 1 h annealing)/P3HT:ICBA (20 mg/ml) (1:1 wt.%)/Al (100 nm) were investigated with the maximum power conversion efficiency of 6.02%. Authors’ information HK and YK are MSc students at the Chemical Engineering Department, Pusan National University, South Korea. YC is a professor in the Chemical Engineering Department, Pusan National University, South Korea. Acknowledgements
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