Nanoforest Nb2O5 Photoanodes for Dye-Sensitized Solar Cells by Pulsed Laser Deposition

被引：127

作者：

Ghosh, Rudresh ^{[1
,3
]}

Brennaman, M. Kyle ^{[2
]}

Uher, Tim ^{[1
]}

Ok, Myoung-Ryul ^{[4
]}

Samulski, Edward T. ^{[2
]}

McNeil, L. E. ^{[1
]}

Meyer, Thomas J. ^{[2
]}

Lopez, Rene ^{[1
,3
]}

机构：

[1] Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27599 USA

[2] Univ N Carolina, Dept Chem, Chapel Hill, NC 27599 USA

[3] Univ N Carolina, Inst Adv Mat, Chapel Hill, NC 27599 USA

[4] Univ N Carolina, Curriculum Appl Sci & Engn, Chapel Hill, NC 27599 USA

来源：

ACS APPLIED MATERIALS & INTERFACES | 2011年 / 3卷 / 10期

关键词：

niobium oxide; dye -sensitized solar cell; pulsed laser deposition; IPCE; ELECTRON-TRANSPORT; EFFICIENCY; PROGRESS;

D O I：

10.1021/am200805x

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Vertically aligned bundles of Nb2O5 nanocrystals were fabricated by pulsed laser deposition (PLD) and tested as a photoanode material in dye-sensitized solar cells (DSSC). They were characterized using scanning and transmission electron microscopies, optical absorption spectroscopy (UV-vis), and incident-photon-to-current efficiency (IPCE) experiments. The background gas composition and the thickness of the films were varied to determine the influence of those parameters in the photoanode behavior. An optimal background pressure of oxygen. during deposition was found to produce a photoanode structure that both achieves high dye loading and enhanced photoelectrochemical performance. For optimal structures, IPCE values up to 40% and APCE values around 90% were obtained with the N-3 dye and I-3(-)/I- couple in acetonitrile with open circuit voltage of 0.71 V and 2.41% power conversion efficiency.

引用

页码：3929 / 3935

页数：7

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