IMPEDANCE SPECTROSCOPY: A GENERAL …

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CHAPTER 12IMPEDANCE spectroscopy : A GENERAL introduction AND APPLICATION TO DYE-SENSITIZED SOLAR CELLSJuan Bisquert and Francisco INTRODUCTIONImpedance spectroscopy (IS) has become a major tool for investigating the properties and quality of dye-sensitized solar cell (DSC) devices. This chapter provides an intro-duction of IS interpretation methods focusing on the analysis of DSC IMPEDANCE data. It also presents a scope of the main results obtained so far. IS gives access to funda-mental mechanisms of operation of solar cells, for which reason we discuss our views of basic photovoltaic principles required to realize the interpretation of the experi-mental results. The chapter summarizes some 10 years of experience of the authors with regard to modeling, measurement and interpretation of IS applied in good way to start this subject is a brief recollection of how it evolved over the fi rst years. The original standard confi guration of a DSC [ ] that emerged in the early 1990s is formed by a large internal area constituted of a nanostructured TiO2 semiconductor, connected to a transparent conducting oxide (TCO) and coated with photoactive dye molecules.

CHAPTER 12 IMPEDANCE SPECTROSCOPY: A GENERAL INTRODUCTION AND APPLICATION TO DYE-SENSITIZED SOLAR CELLS Juan Bisquert and Francisco Fabregat-Santiago

  General, Introduction, General a, Spectroscopy, Impedance, Impedance spectroscopy, A general introduction