Elevated Temperature Anodized Nb2O5: A Photoanode Material with Exceptionally Large Photoconversion Efficiencies

被引：156

作者：

Ou, Jian Zhen ^{[1
]}

Rani, Rozina A. ^{[1
]}

Ham, Moon-Ho ^{[2
,3
]}

Field, Matthew R. ^{[4
]}

Zhang, Yuan ^{[1
]}

Zheng, Haidong ^{[1
]}

Reece, Peter ^{[5
]}

Zhuiykov, Serge ^{[6
]}

Sriram, Sharath ^{[1
]}

Bhaskaran, Madhu ^{[1
]}

Kanee, Richard B. ^{[7
]}

Kalantar-Zadeh, Kourosh ^{[1
]}

机构：

[1] RMIT Univ, Sch Elect & Comp Engn, Melbourne, Vic, Australia

[2] MIT, Dept Chem Engn, Cambridge, MA 02139 USA

[3] Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju, South Korea

[4] RMIT Univ, Sch Appl Sci, Melbourne, Vic, Australia

[5] Univ New S Wales, Sch Phys, Sydney, NSW, Australia

[6] CSIRO, Mat Sci & Engn Div, Highett, Vic, Australia

[7] Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA

来源：

ACS NANO | 2012年 / 6卷 / 05期

基金：

澳大利亚研究理事会;

关键词：

dye-sensitized solar cell; Nb2O5; nanoporous network; TiO2; anodization; SENSITIZED SOLAR-CELLS; TIO2 NANOTUBE ARRAYS; SELF-ORGANIZED NIOBIUM; OXIDE; RECOMBINATION; FABRICATION; TRANSPORT; SPECTRA;

D O I：

10.1021/nn300408p

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Here, we demonstrate that niobium pentoxide (Nb2O5) is an ideal candidate for increasing the efficiencies of dye-sensitized solar cells (DSSCs). The key lies in developing a Nb2O5 crisscross nanoporous network, using our unique elevated temperature anodization process. For the same thicknesses of 4 mu m, the DSSC based on the Nb2O5 layer has a significantly higher efficiency (similar to 4.1%) when compared to that which incorporates a titanium dioxide nanotubular layer (similar to 2.7%). This is the highest efficiency among all of the reported photoanodes for such a thickness when utilizing back-side illumination. We ascribe this to a combination of reduced electron scattering, greater surface area, wider band gap, and higher conduction band edge, as well as longer effective electron lifetimes.

引用

页码：4045 / 4053

页数：9

共 39 条

[1] Determination of parameters of electron transport in dye-sensitized solar cells using electrochemical impedance spectroscopy [J].

Adachi, Motonari ;

Sakamoto, Masaru ;

Jiu, Jinting ;

Ogata, Yukio ;

Isoda, Seiji .

JOURNAL OF PHYSICAL CHEMISTRY B, 2006, 110 (28) :13872-13880

[2] Origin of efficiency enhancement in Nb2O5 coated titanium dioxide nanorod based dye sensitized solar cells [J].

Barea, Eva ;

Xu, Xueqing ;

Gonzalez-Pedro, Victoria ;

Ripolles-Sanchis, Teresa ;

Fabregat-Santiago, Francisco ;

Bisquert, Juan .

ENERGY & ENVIRONMENTAL SCIENCE, 2011, 4 (09) :3414-3419

[3] Porous niobium oxide films prepared by anodization-annealing-anodization [J].

Choi, Jinsub ;

Lim, Jae Hoon ;

Lee, Jaeyoung ;

Kim, Kyung Ja .

NANOTECHNOLOGY, 2007, 18 (05)

[4]

Dang XN, 2011, NAT NANOTECHNOL, V6, P377, DOI [10.1038/NNANO.2011.50, 10.1038/nnano.2011.50]

[5] Low-temperature fabrication of dye-sensitized solar cells by transfer of composite porous layers [J].

Dürr, M ;

Schmid, A ;

Obermaier, M ;

Rosselli, S ;

Yasuda, A ;

Nelles, G .

NATURE MATERIALS, 2005, 4 (08) :607-611

[6] Influence of electrolyte in transport and recombination in dye-sensitized solar cells studied by impedance spectroscopy [J].

Fabregat-Santiago, F ;

Bisquert, J ;

Garcia-Belmonte, G ;

Boschloo, G ;

Hagfeldt, A .

SOLAR ENERGY MATERIALS AND SOLAR CELLS, 2005, 87 (1-4) :117-131

[7] Self-ordering electrochemistry: a review on growth and functionality of TiO2 nanotubes and other self-aligned MOx structures [J].

Ghicov, Andrei ;

Schmuki, Patrik .

CHEMICAL COMMUNICATIONS, 2009, (20) :2791-2808

[8] Recent Advances in Sensitized Mesoscopic Solar Cells [J].

Graetzel, Michael .

ACCOUNTS OF CHEMICAL RESEARCH, 2009, 42 (11) :1788-1798

[9] Photoelectrochemical cells [J].

Grätzel, M .

NATURE, 2001, 414 (6861) :338-344

[10] Advancing beyond current generation dye-sensitized solar cells [J].

Hamann, Thomas W. ;

Jensen, Rebecca A. ;

Martinson, Alex B. F. ;

Van Ryswyk, Hal ;

Hupp, Joseph T. .

ENERGY & ENVIRONMENTAL SCIENCE, 2008, 1 (01) :66-78

← 1 2 3 4 →