Journal ArticleDOI
Nanowire dye-sensitized solar cells
Matt Law,Lori E. Greene,Lori E. Greene,Justin C. Johnson,Richard J. Saykally,Peidong Yang,Peidong Yang +6 more
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TLDR
This work introduces a version of the dye-sensitized cell in which the traditional nanoparticle film is replaced by a dense array of oriented, crystalline ZnO nanowires, which features a surface area up to one-fifth as large as a nanoparticle cell.Abstract:
Excitonic solar cells1—including organic, hybrid organic–inorganic and dye-sensitized cells (DSCs)—are promising devices for inexpensive, large-scale solar energy conversion. The DSC is currently the most efficient2 and stable3 excitonic photocell. Central to this device is a thick nanoparticle film that provides a large surface area for the adsorption of light-harvesting molecules. However, nanoparticle DSCs rely on trap-limited diffusion for electron transport, a slow mechanism that can limit device efficiency, especially at longer wavelengths. Here we introduce a version of the dye-sensitized cell in which the traditional nanoparticle film is replaced by a dense array of oriented, crystalline ZnO nanowires. The nanowire anode is synthesized by mild aqueous chemistry and features a surface area up to one-fifth as large as a nanoparticle cell. The direct electrical pathways provided by the nanowires ensure the rapid collection of carriers generated throughout the device, and a full Sun efficiency of 1.5% is demonstrated, limited primarily by the surface area of the nanowire array.read more
Citations
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Nanoscale design to enable the revolution in renewable energy
Jason B. Baxter,Zhixi Bian,Gang Chen,David Danielson,Mildred S. Dresselhaus,Andrei G. Fedorov,Timothy S. Fisher,Christopher W. Jones,Edward J. Maginn,Uwe Kortshagen,Arumugam Manthiram,Arthur J. Nozik,Debra R. Rolison,Timothy D. Sands,Li Shi,David S. Sholl,Yiying Wu +16 more
TL;DR: In this article, the authors focus on an important set of solar, thermal, and electrochemical energy conversion, storage, and conservation technologies specifically related to recent and prospective advances in nanoscale science and technology that offer high potential in addressing the energy challenge.
Journal ArticleDOI
Highly ordered TiO2 nanotube arrays with controllable length for photoelectrocatalytic degradation of phenol
Zhaoyue Liu,Xintong Zhang,Shunsuke Nishimoto,Ming Jin,Donald A. Tryk,Taketoshi Murakami,Akira Fujishima +6 more
TL;DR: In this paper, the authors report on the application of highly ordered TiO2 nanotube arrays with different lengths for the photoelectrocatalytic degradation of phenol.
Journal ArticleDOI
Antibacterial activity of ZnO nanorods prepared by a hydrothermal method
KH Tam,Aleksandra B. Djurišić,Charis M.N. Chan,Yan Yan Xi,C.W. Tse,Yu Hang Leung,W. K. Chan,Frederick C. Leung,Doris W.T. Au +8 more
TL;DR: In this paper, the antibacterial activity of ZnO nanorods prepared by a hydrothermal method against a gram-negative bacterium Escherichia coli and a gram positive bacterium Bacillus atrophaeus was investigated.
Journal ArticleDOI
From 1D and 2D ZnO nanostructures to 3D hierarchical structures with enhanced gas sensing properties
TL;DR: This work provides the route for structure induced enhancement of gas sensing performance by designing a desirable nanostructure, which could also be extended to synthesize other metal oxide nanostructures with superior gas sensingPerformance.
Journal ArticleDOI
One-dimension-based spatially ordered architectures for solar energy conversion
TL;DR: This review focuses on the progress of photocatalytic solar energy conversion over controlled one-dimension-based spatially ordered architecture hybrids, and discusses the opportunity and future direction of integration of 1D materials into high-dimensional, spatially organized architectures.
References
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Journal ArticleDOI
A low-cost, high-efficiency solar cell based on dye-sensitized colloidal TiO2 films
TL;DR: In this article, the authors describe a photovoltaic cell, created from low-to medium-purity materials through low-cost processes, which exhibits a commercially realistic energy-conversion efficiency.
Journal ArticleDOI
Hybrid Nanorod-Polymer Solar Cells
TL;DR: It is demonstrated that semiconductor nanorods can be used to fabricate readily processed and efficient hybrid solar cells together with polymers and Tuning the band gap by altering the nanorod radius enabled us to optimize the overlap between the absorption spectrum of the cell and the solar emission spectrum.
Journal ArticleDOI
Engineering of Efficient Panchromatic Sensitizers for Nanocrystalline TiO2-Based Solar Cells
Mohammad Khaja Nazeeruddin,Peter Pechy,Thierry Renouard,Shaik M. Zakeeruddin,Robin Humphry-Baker,Pascal Comte,Paul Liska,Le Cevey,E Costa,Valery Shklover,Leone Spiccia,Glen B. Deacon,Carlo Alberto Bignozzi,Michael Grätzel +13 more
TL;DR: The black dye, when anchored to nanocrystalline TiO(2) films achieves very efficient sensitization over the whole visible range extending into the near-IR region up to 920 nm, yielding over 80% incident photon-to-current efficiencies (IPCE).
Journal ArticleDOI
Low-temperature wafer-scale production of ZnO nanowire arrays.
Lori E. Greene,Matt Law,Joshua E. Goldberger,Franklin Kim,Justin C. Johnson,Yanfeng Zhang,Richard J. Saykally,Peidong Yang +7 more
TL;DR: A low-temperature, large-scale, and versatile synthetic process is needed before ZnO nanowire arrays find realistic applications in solar energy conversion, light emission, and other promising areas, and the ease of commercial scale-up is presented.
Journal ArticleDOI
A stable quasi-solid-state dye-sensitized solar cell with an amphiphilic ruthenium sensitizer and polymer gel electrolyte.
Peng Wang,Shaik M. Zakeeruddin,Jacques-E. Moser,Mohammad Khaja Nazeeruddin,Takashi Sekiguchi,Michael Grätzel +5 more
TL;DR: A DSC with unprecedented stable performance under both thermal stress and soaking with light, matching the durability criteria applied to silicon solar cells for outdoor applications is shown, fostering widespread practical application of dye-sensitized solar cells.