Increasing Photocurrents in Dye Sensitized Solar Cells with Tantalum-Doped Titanium Oxide Photoanodes Obtained by Laser Ablation

被引：28

作者：

Ghosh, Rudresh ^{[1
]}

Hara, Yukihiro ^{[1
]}

Aibabaei, Leila ^{[1
,2
]}

Hanson, Kenneth ^{[2
]}

Rangan, Sylvie ^{[3
]}

Bartynski, Robert ^{[3
]}

Meyer, Thomas J. ^{[2
]}

Lopez, Rene ^{[1
]}

机构：

[1] Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27515 USA

[2] Univ N Carolina, Dept Chem, Chapel Hill, NC USA

[3] Rutgers State Univ, Dept Phys, Piscataway, NJ 08855 USA

来源：

ACS APPLIED MATERIALS & INTERFACES | 2012年 / 4卷 / 09期

基金：

美国国家科学基金会;

关键词：

dye sensitized solar cells; pulsed laser deposition; tantalum-doped titanium oxide; emerging photovoltaics; photocurrent; electrochemical impedance spectroscopy; TRANSPARENT CONDUCTING OXIDE; CHARGE RECOMBINATION; NANOWIRE ARRAYS; TIO2; PHOTOANODE; SURFACE-AREA; DEPOSITION; EFFICIENCY; NANOTUBES; TRANSPORT; FILMS;

D O I：

10.1021/am300938g

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Laser ablation is employed to produce vertically aligned nanostructured films of undoped and tantalum-doped TiO2 nanoparticles. Dye-sensitized solar cells using the two different materials are compared. Tantalum-doped TiO2 photoanode show 65% increase in photocurrents and around 39% improvement in overall cell efficiency compared to undoped TiO2. Electrochemical impedance spectroscopy, Mott-Schottky analysis and open circuit voltage decay is used to investigate the cause of this improved performance. The enhanced performance is attributed to a combination of increased electron concentration in the semiconductor and a reduced electron recombination rate.

引用

页码：4566 / 4570

页数：5

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