Charge transport in dye-sensitized solar cell*

ANSN Editor

ANSN Editor

Keywords: nano

Abstract

The effect of charge transport on the photovoltaic properties of dye-sensitized solar cells (DSCs) was investigated by the experimental results and the ion transport. The short current photocurrent density (J_sc) is determined by the electron transport in porous TiO₂ when the diffusion limited current (J_dif) due to the ${{{\rm I}}_{3}}^{-}$ transport is larger than the photo-generated electron flux (J_g) estimated from the light harvesting efficiency of dye-sensitized porous TiO₂ and the solar spectrum. However, the J_sc value is determined by the ion transport in the electrolyte solution at J_dif < J_g. The J value becomes constant against light intensity, and is expressed as the saturated current ( $J_{{\rm sc}}^{{\rm s}}$ ). The ${{J}^{s}}$ value depends on the thickness (d) of the TiO₂ layer, the initial concentration ( $C_{{\rm OX}}^{{\rm 0}}$ ), and the diffusion coefficient ( $D_{{\rm OX}}^{{\rm b}}$ ) of ${{{\rm I}}_{3}}^{-}$ . These suitable parameters were determined by using the ion transport

Charge transport in dye-sensitized solar cell*

Masatoshi Yanagida

Abstract