Photovoltaic and impedance spectroscopy analysis of p-n like junction for dye sensitized solar cell

I. S. Yahia*, Hoda S. Hafez, F. Yakuphanoglu, B. Filiz Senkal, M. S.A.Abdel Mottaleb

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)


A dye-sensitized solar cell based on nanostructure TiO2 and PCBM:P3HT blend was fabricated and the photovoltaic and impedance spectroscopy properties of the solar cell were investigated. The solar cell gives a short circuit current density of 0.75 mA/cm2 and an open circuit voltage of 0.60 V under AM1.5. The photovoltage of the solar cell was greatly enhanced by PCBM:P3HT blend. The capacitance-voltage, the conductance-voltage, the series resistances-voltage characteristics of the solar cell were measured in a wide range of frequency for the first time for DSSC applications. The capacitance-voltage shows a behavior from the positive to negative capacitance due to injection of electrons from the FTO electrode into TiO2. It is evaluated that the photovoltaic performance of the dye-sensitized solar cell can be improved using various organic semiconductors.

Original languageEnglish
Pages (from-to)1299-1305
Number of pages7
JournalSynthetic Metals
Issue number13-14
Publication statusPublished - Jul 2011


This work was supported by the SCIENTIFIC AND TECHNOLOGICAL RESEARCH COUNCIL OF TURKEY (TUBITAK)–BIDEB according to Overseas Postdoctoral Research Fellowship Programme and the Scientific Research Project Coordination Center of Istanbul Technical University (ITU) under project No: 33381. Authors would like to introducing the deep thanks to TUBITAK and ITU.

FundersFunder number
Istanbul Teknik Üniversitesi33381


    • Impedance spectroscopy
    • PCBM:P3HT
    • Photovoltaic properties
    • Positive and negative capacitance
    • TiO nanostructure


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