Nanoforest of Hydrothermally Grown Hierarchical ZnO Nanowires for a High Efficiency Dye-Sensitized Solar Cell

被引：930

作者：

Ko, Seung Hwan ^{[1
]}

Lee, Daeho ^{[2
]}

Kang, Hyun Wook ^{[1
]}

Nam, Koo Hyun ^{[1
]}

Yeo, Joon Yeob ^{[1
]}

Hong, Suk Joon ^{[1
]}

Grigoropoulos, Costas P. ^{[2
]}

Sung, Hyung Jin ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol, Dept Mech Engn, Appl Nano Technol & Sci Lab, Yusung Gu 305701, South Korea

[2] Univ Calif Berkeley, Dept Mech Engn, Laser Thermal Lab, Berkeley, CA 94720 USA

来源：

NANO LETTERS | 2011年 / 11卷 / 02期

基金：

新加坡国家研究基金会; 美国国家科学基金会;

关键词：

Zinc oxide nanowire; dye-sensitized solar cell; nanoforest; hierarchical growth; branched structure; FABRICATION; NANOPARTICLES; CONVERSION; NANOSHEETS; CRYSTAL; ARRAYS; FILM;

D O I：

10.1021/nl1037962

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this paper, in order to increase the power conversion efficiency we demonstrated the selective growth of "nanoforest" composed of high density, long branched "treelike" multigeneration hierarchical ZnO nanowire photoanodes. The overall light-conversion efficiency of the branched ZnO nanowire DSSCs was almost 5 times higher than the efficiency of DSSCs constructed by upstanding ZnO nanowires. The efficiency increase is due to greatly enhanced surface area for higher dye loading and light harvesting, and also due to reduced charge recombination by providing direct conduction pathways along the crystalline ZnO "nanotree" multi generation branches. We performed a parametric study to determine optimum hierarchical ZnO nanowire photoanodes through the combination of both length wise growth and branched growth processes. The novel selective hierarchical growth approach represents a low cost, all solution processed hydrothermal method that yields complex hierarchical ZnO nanowire photoanodes by utilizing a simple engineering of seed particles and capping polymer.

引用

页码：666 / 671

页数：6

共 28 条

[1] Dye-sensitized solar cells based on semiconductor morphologies with ZnO nanowires [J].

Baxter, JB ;

Aydil, ES .

SOLAR ENERGY MATERIALS AND SOLAR CELLS, 2006, 90 (05) :607-622

[2] Formation of Branched ZnO Nanowires from Solvothermal Method and Dye-Sensitized Solar Cells Applications [J].

Cheng, Hsin-Ming ;

Chiu, Wei-Hao ;

Lee, Chia-Hua ;

Tsai, Song-Yeu ;

Hsieh, Wen-Feng .

JOURNAL OF PHYSICAL CHEMISTRY C, 2008, 112 (42) :16359-16364

[3] A Bicontinuous Double Gyroid Hybrid Solar Cell [J].

Crossland, Edward J. W. ;

Kamperman, Marleen ;

Nedelcu, Mihaela ;

Ducati, Caterina ;

Wiesner, Ulrich ;

Smilgies, Detlef -M. ;

Toombes, Gilman E. S. ;

Hillmyer, Marc A. ;

Ludwigs, Sabine ;

Steiner, Ullrich ;

Snaith, Henry J. .

NANO LETTERS, 2009, 9 (08) :2807-2812

[4] ZnO nanosheets with ordered pore periodicity via colloidal crystal template assisted electrochemical deposition [J].

Fu, M ;

Zhou, J ;

Xiao, QF ;

Li, B ;

Zong, RL ;

Chen, W ;

Zhang, J .

ADVANCED MATERIALS, 2006, 18 (08) :1001-+

[5] Solar energy conversion by dye-sensitized photovoltaic cells [J].

Grätzel, M .

INORGANIC CHEMISTRY, 2005, 44 (20) :6841-6851

[6] Conversion of sunlight to electric power by nanocrystalline dye-sensitized solar cells [J].

Grätzel, M .

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2004, 164 (1-3) :3-14

[7] Dye-Sensitized Solar Cell Based on a Three-Dimensional Photonic Crystal [J].

Guldin, Stefan ;

Huttner, Sven ;

Kolle, Matthias ;

Welland, Mark E. ;

Mueller-Buschbaum, Peter ;

Friend, Richard H. ;

Steiner, Ullrich ;

Tetreault, Nicolas .

NANO LETTERS, 2010, 10 (07) :2303-2309

[8] Improved dye-sensitized solar cells with a ZnO-nanoflower photoanode [J].

Jiang, C. Y. ;

Sun, X. W. ;

Lo, G. Q. ;

Kwong, D. L. ;

Wang, J. X. .

APPLIED PHYSICS LETTERS, 2007, 90 (26)

[9] Simple solvothermal route to synthesize ZnO nanosheets, nanonails, and well-aligned nanorod arrays [J].

Kar, Soumitra ;

Dev, Apurba ;

Chaudhuri, Subhadra .

JOURNAL OF PHYSICAL CHEMISTRY B, 2006, 110 (36) :17848-17853

[10] ZnO nanowire network transistor fabrication on a polymer substrate by low-temperature, all-inorganic nanoparticle solution process [J].

Ko, Seung H. ;

Park, Inkyu ;

Pan, Heng ;

Misra, Nipun ;

Rogers, Matthew S. ;

Grigoropoulos, Costas P. ;

Pisano, Albert P. .

APPLIED PHYSICS LETTERS, 2008, 92 (15)

← 1 2 3 →