Spatial location of transport-limiting traps in TiO2 nanoparticle films in dye-sensitized solar cells -: art. no. 202106

被引：174

作者：

Kopidakis, N ^{[1
]}

Neale, NR ^{[1
]}

Zhu, K ^{[1
]}

van de Lagemaat, J ^{[1
]}

Frank, AJ ^{[1
]}

机构：

[1] Natl Renewable Energy Lab, Golden, CO 80401 USA

来源：

APPLIED PHYSICS LETTERS | 2005年 / 87卷 / 20期

关键词：

D O I：

10.1063/1.2130723

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The dependence of the electron diffusion coefficient and photoinduced electron density on the internal surface area of TiO2 nanoparticle films in dye-sensitized solar cells was investigated by photocurrent transient measurements. The internal surface area was varied by altering the average particle size of the films. The density of electron traps in the films is found to change in direct proportion with the internal surface area, indicating that the traps are located predominately at the surface of TiO2 particles instead of in the bulk of the particles or at interparticle grain boundaries. The observed scaling of the electron diffusion coefficient with the internal surface area suggests that surface traps limit transport in TiO2 nanoparticle films. These results address a long-standing issue in the understanding of electron transport in dye-sensitized TiO2 solar cells. (C) 2005 American Institute of Physics.

引用

页码：1 / 3

页数：3

共 14 条

[1] Highly efficient dye-sensitized solar cells with a titania thin-film electrode composed of a network structure of single-crystal-like TiO2 nanowires made by the "oriented attachment" mechanism [J].