Enhanced Electron Collection Efficiency in Dye-Sensitized Solar Cells Based on Nanostructured TiO2 Hollow Fibers

被引：231

作者：

Ghadiri, Elham ^{[1
]}

Taghavinia, Nima ^{[1
,2
]}

Zakeeruddin, Shaik M. ^{[3
]}

Graetzel, Michael ^{[3
]}

Moser, Jacques-E. ^{[3
]}

机构：

[1] Sharif Univ Technol, Inst Nanosci & Nanotechnol, Tehran 14588, Iran

[2] Sharif Univ Technol, Dept Phys, Tehran 14588, Iran

[3] Ecole Polytech Fed Lausanne, Inst Chem Sci & Engn, CH-1015 Lausanne, Switzerland

来源：

NANO LETTERS | 2010年 / 10卷 / 05期

基金：

瑞士国家科学基金会;

关键词：

Dye-sensitized solar cells; TiO2 nanostructured hollow fibers; charge transport; interfacial electron transfer dynamics; transient photovoltage and photocurrent; time-resolved diffuse reflectance; TRANSPARENT CONDUCTING OXIDE; NANOTUBE ARRAYS; RECOMBINATION; TRANSPORT; FILM;

D O I：

10.1021/nl904125q

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Nanostructured TiO2 hollow fibers have been prepared using natural cellulose fibers as a template. This cheap and easily processed material was used to produce highly porous photoanodes incorporated in dye-sensitized solar cells and exhibited remarkably enhanced electron transport properties compared to mesoscopic films made of spherical nanoparticles. Photoinjected electron lifetime, in particular, was multiplied by 3-4 in the fiber morphology, while the electron transport rate within the fibrous photoanaode was doubled. A nearly quantitative absorbed photon-to-electrical current conversion yield exceeding 95% was achieved upon excitation at 550 nm and a photovoltaic power conversion efficiency of 7.2% reached under simulated AM 1.5 (100 mW cm(-2)) solar illumination.

引用

页码：1632 / 1638

页数：7

共 26 条

[1] Re-evaluation of Recombination Losses in Dye-Sensitized Cells: The Failure of Dynamic Relaxation Methods to Correctly Predict Diffusion Length in Nanoporous Photoelectrodes [J].