Research

Influence of grain morphology on electron transport in dye sensitized nanocrystalline solar cells


Reference:

Cass, M. J., Qiu, F. L., Walker, A. B., Fisher, A. C. and Peter, L. M., 2003. Influence of grain morphology on electron transport in dye sensitized nanocrystalline solar cells. Journal of Physical Chemistry B, 107 (1), pp. 113-119.

Related documents:

This repository does not currently have the full-text of this item.
You may be able to access a copy if URLs are provided below.

Official URL:

http://dx.doi.org/10.1021/jp0267981

Abstract

We present a Monte Carlo model of electron transport in mesoporous films of TiO2 particles in which electrons execute a random walk through a chain of spherical grains with traps at the surface of the grains. This has been used to simulate transient photocurrents in dye sensitized nanocrystalline solar cells. By comparing our results with a model based on solutions of the continuity equation for the free and trapped electron densities in which the film is treated as a homogeneous medium, we find that necks between grains have a noticeable effect on reducing the photocurrent. Values of an effective electron diffusion coefficient have been deduced by comparing an analytical solution to the continuity equation for the free electrons, in which the traps and back-reaction are ignored, with the numerical results from the Monte Carlo and continuum models. To the authors' knowledge, this is the first time that the influence of the grain connectivity on electron transport has been modeled.

Details

Item Type Articles
CreatorsCass, M. J., Qiu, F. L., Walker, A. B., Fisher, A. C. and Peter, L. M.
DOI10.1021/jp0267981
DepartmentsFaculty of Science > Chemistry
Faculty of Science > Physics
RefereedYes
StatusPublished
ID Code5050
Additional InformationID number: ISI:000180254900019

Export

Actions (login required)

View Item