Nanowire-Based Three-Dimensional Transparent Conducting Oxide Electrodes for Extremely Fast Charge Collection

被引:46
作者
Noh, Jun Hong [2 ]
Han, Hyun Soo [2 ]
Lee, Sangwook [2 ]
Kim, Jin Young [1 ]
Hong, Kug Sun [2 ]
Han, Gil-Sang [3 ]
Shin, Hyunjung [3 ]
Jung, Hyun Suk [3 ]
机构
[1] Natl Renewable Energy Lab, Golden, CO 80401 USA
[2] Seoul Natl Univ, WCU Hybrid Mat Program, Dept Mat Sci & Engn, Seoul 151744, South Korea
[3] Kookmin Univ, Sch Adv Mat Engn, Seoul 136702, South Korea
基金
新加坡国家研究基金会;
关键词
SENSITIZED SOLAR-CELLS; NANOCRYSTALLINE TIO2 FILMS; ENERGY CONVERSION; EFFICIENCY; PERFORMANCE; TRANSPORT; ARRAYS; RECOMBINATION; PHOTOCURRENT; NANOTUBES;
D O I
10.1002/aenm.201100241
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A 3D transparent conducting oxide (3D-TCO) has been fabricated by growing Sn-doped indium oxide (ITO) nanowire arrays on glass substrates via a vapor transport method. The 3D TCO charge-collection properties have been compared to those of conventional two-dimensional TCO (2D-TCO) thin films. For use as a photoelectrode in dye-sensitized solar cells, ITO-TiO2 core-shell nanowire arrays were prepared by depositing a 45 nm-thick mesoporous TiO2 shell layer consisting of similar to 6 nm anatase nanoparticles using TiCl4 treatments. Dye-sensitized solar cells fabricated using these ITO-TiO2 core-shell nanowire arrays show extremely fast charge collection owing to the shorter electron paths across the 45 nm-thick TiO2 shell compared to the 2D TCO. Interestingly, the charge-collection time does not increase with the overall electrode thickness, which is counterintuitive to conventional diffusion models. This result implies that, in principle, maximum light harvesting can be achieved without hindering the charge collection. The proposed new 3D TCO should also be attractive for other photovoltaic applications where the active layer thickness is limited by poor charge collection.
引用
收藏
页码:829 / 835
页数:7
相关论文
共 39 条
[1]   Re-evaluation of Recombination Losses in Dye-Sensitized Cells: The Failure of Dynamic Relaxation Methods to Correctly Predict Diffusion Length in Nanoporous Photoelectrodes [J].
Barnes, Piers R. F. ;
Liu, Lingxuan ;
Li, Xiaoe ;
Anderson, Assaf Y. ;
Kisserwan, Hawraa ;
Ghaddar, Tarek H. ;
Durrant, James R. ;
O'Regan, Brian C. .
NANO LETTERS, 2009, 9 (10) :3532-3538
[2]   Synthesis and characterization of ZnO nanowires and their integration into dye-sensitized solar cells [J].
Baxter, J. B. ;
Walker, A. M. ;
van Ommering, K. ;
Aydil, E. S. .
NANOTECHNOLOGY, 2006, 17 (11) :S304-S312
[3]   ANOMALOUS OPTICAL ABSORPTION LIMIT IN INSB [J].
BURSTEIN, E .
PHYSICAL REVIEW, 1954, 93 (03) :632-633
[4]   Electron transport and recombination in dye-sensitized solar cells made from single-crystal rutile TiO2 nanowires [J].
Enache-Pommer, Emil ;
Liu, Bin ;
Aydil, Eray S. .
PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2009, 11 (42) :9648-9652
[5]  
Fan ZY, 2009, NAT MATER, V8, P648, DOI [10.1038/NMAT2493, 10.1038/nmat2493]
[6]   Vertically Aligned Single Crystal TiO2 Nanowire Arrays Grown Directly on Transparent Conducting Oxide Coated Glass: Synthesis Details and Applications [J].
Feng, Xinjian ;
Shankar, Karthik ;
Varghese, Oomman K. ;
Paulose, Maggie ;
Latempa, Thomas J. ;
Grimes, Craig A. .
NANO LETTERS, 2008, 8 (11) :3781-3786
[7]   Solar energy conversion by dye-sensitized photovoltaic cells [J].
Grätzel, M .
INORGANIC CHEMISTRY, 2005, 44 (20) :6841-6851
[8]   Spectral characteristics of light harvesting, electron injection, and steady-state charge collection in pressed TiO2 dye solar cells [J].
Halme, Janne ;
Boschloo, Gerrit ;
Hagfeldt, Anders ;
Lund, Peter .
JOURNAL OF PHYSICAL CHEMISTRY C, 2008, 112 (14) :5623-5637
[9]   EVAPORATED SN-DOPED IN2O3 FILMS - BASIC OPTICAL-PROPERTIES AND APPLICATIONS TO ENERGY-EFFICIENT WINDOWS [J].
HAMBERG, I ;
GRANQVIST, CG .
JOURNAL OF APPLIED PHYSICS, 1986, 60 (11) :R123-R159
[10]   Hybrid nanorod-polymer solar cells [J].
Huynh, WU ;
Dittmer, JJ ;
Alivisatos, AP .
SCIENCE, 2002, 295 (5564) :2425-2427