Study the Effect of Ruthenium Dye Layer on Negative Capacitance in Solar Cells Based on the Nc-TiO2 Semiconducting Polymer Heterojunction
Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53409#.VMG14SzQrzE Author(s) H. Al-Dmour Affiliation(s) Department of Physics, Faculty of Science, Mu'tah University, Mu’tah, Jordan . ABSTRACT We report the effect of ruthenium dye on negative capacitance of nanocrystalline titanium dioxide/poly(3-hexyl thiophene), nc-TiO <span "=""> 2 /P3HT, heterojunction solar cells. It has been found that the low frequency capacitance reaches high positive value and then drop to the negative region. In P3HT/Ru-Dye/nc-TiO 2 solar cells, the negative capacitance is observed under very low forward bias condition unlike the negative capacitance in P3HT/ncTiO 2 solar cells. That is attributed to the difference of the concentration of dipole and presence of depletion region at interface between the P3HT and nc-TiO 2 . KEYWORDS Admittance Spectroscopy , Negative Capacitance , Forward Bias , P...