Nidal H. Abu-Zahra and  Mahmoud Algazzar,  Enhancing Power Conversion Efficiency of P3HT/PCBM Polymer Solar Cells.   journal   = {International Journal of Materials and Metallurgical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2014, vol. 88(4). 279 - 284
    [viewed 21 October 2021]. Available from: https://publications.waset.org/pdf/9997952.