Influence of the porosity on diffusion and lifetime in porous TiO2 layers

被引：30

作者：

Dittrich, T

Ofir, A

Tirosh, S

Grinis, L

Zaban, A

机构：

[1] Hahn Meitner Inst Berlin GmbH, D-14109 Berlin, Germany

[2] Bar Ilan Univ, Dept Chem, IL-52900 Ramat Gan, Israel

来源：

APPLIED PHYSICS LETTERS | 2006年 / 88卷 / 18期

基金：

以色列科学基金会;

关键词：

D O I：

10.1063/1.2201045

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Photocurrent transients were investigated on pressed and sintered porous TiO2 layers which were immersed in electrolyte during the measurements. Unpressed porous TiO2 layers were prepared by electrophoretic deposition. The porosity of the layers was changed systematically by pressing. The surfaces of the TiO2 nanoparticles and the intimate contact between them were identically conditioned by sintering in air at 450 degrees C after pressing. With decreasing porosity, the diffusion coefficient increased while the electron lifetime decreased. The results are discussed on the base of the change of the mean coordination number between TiO2 nanoparticles. (c) 2006 American Institute of Physics.

引用

页数：3

共 10 条

[1] ADSORBATE EFFECTS ON PHOTOLUMINESCENCE AND ELECTRICAL-CONDUCTIVITY OF POROUS SILICON [J].