Polydisperse aggregates of ZnO nanocrystallites: A method for energy-conversion-efficiency enhancement in dye-sensitized solar cells

被引：270

作者：

Zhang, Qifeng ^{[1
]}

Chou, Tammy P. ^{[1
]}

Russo, Bryan ^{[1
]}

Jenekhe, Samson A. ^{[2
]}

Cao, Guozhong ^{[1
]}

机构：

[1] Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98195 USA

[2] Univ Washington, Dept Chem Engn, Seattle, WA 98195 USA

来源：

ADVANCED FUNCTIONAL MATERIALS | 2008年 / 18卷 / 11期

关键词：

D O I：

10.1002/adfm.200701073

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

ZnO films consisting of either polydisperse or monodisperse aggregates of nanocrystallites were fabricated and studied as dye-sensitized solar-cell electrodes. The results revealed that the overall energy-conversion efficiency of the cells could be significantly affected by either the average size or the size distribution of the ZnO aggregates. The highest overall energy-conversion efficiency of similar to 4.4% was achieved with the film formed by polydisperse ZnO aggregates with a broad size distribution from 120 to 360nm in diameter. Light scattering by the submicrometer-sized ZnO aggregates was employed to explain the improved solar-cell performance through extending the distance travelled by light so as to increase the light-harvesting efficiency of photoelectrode film. The broad distribution of aggregate size provides the ZnO films with both better packing and an enhanced ability to scatter the incident light, and thus promotes the solar-cell performance.

引用

页码：1654 / 1660

页数：7

共 37 条

[1]

Abramowitz M., 1965, HDB MATH FUNCTIONS F, DOI DOI 10.1119/1.15378

[2] Electron injection and recombination in Ru(dcbpy)2(NCS)2 sensitized nanostructured ZnO [J].

Bauer, C ;

Boschloo, G ;

Mukhtar, E ;

Hagfeldt, A .

JOURNAL OF PHYSICAL CHEMISTRY B, 2001, 105 (24) :5585-5588

[3] Nanowire-based dye-sensitized solar cells [J].

Baxter, JB ;

Aydil, ES .

APPLIED PHYSICS LETTERS, 2005, 86 (05) :1-3

[4]

Bohren C. F., 1983, ABSORPTION SCATTERIN

[5] Spatial confinement of laser light in active random media [J].

Cao, H ;

Xu, JY ;

Zhang, DZ ;

Chang, SH ;

Ho, ST ;

Seelig, EW ;

Liu, X ;

Chang, RPH .

PHYSICAL REVIEW LETTERS, 2000, 84 (24) :5584-5587

[6] Hierarchically structured ZnO film for dye-sensitized solar cells with enhanced energy conversion efficiency [J].

Chou, Tammy P. ;

Zhang, Qifeng ;

Fryxell, Glen E. ;

Cao, Guozhong .

ADVANCED MATERIALS, 2007, 19 (18) :2588-+

[7]

Cullity BD, 1978, Elements of X-ray Diffraction

[8] Optical properties of ZnO nanostructures [J].

Djurisic, Aleksandra B. ;

Leung, Yu Hang .

SMALL, 2006, 2 (8-9) :944-961

[9] Mie-scattering calculation [J].

Du, H .

APPLIED OPTICS, 2004, 43 (09) :1951-1956

[10] Zinc oxide nanostructures: Synthesis and properties [J].

Fan, ZY ;

Lu, JG .

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, 2005, 5 (10) :1561-1573

← 1 2 3 4 →