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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Journal ArticleDOI
Double Role of HMTA in ZnO Nanorods Grown by Chemical Bath Deposition
V. Strano,R. G. Urso,Mario Scuderi,Kingsley O. Iwu,Francesca Simone,Enrico Ciliberto,Corrado Spinella,Salvo Mirabella +7 more
TL;DR: In this article, a double role of hexamethylenetetramine (HMTA) in the growth mechanism of ZnO nanorods is investigated. But the authors focus on the negative effect of HMTA on the vertical arrangement of the nanorod.
Journal ArticleDOI
Tailoring n-ZnO/p-Si Branched Nanowire Heterostructures for Selective Photoelectrochemical Water Oxidation or Reduction
Alireza Kargar,Ke Sun,Yi Jing,Chulmin Choi,Huisu Jeong,Yuchun Zhou,Kristian Madsen,Perry Naughton,Sungho Jin,Gun Young Jung,Deli Wang +10 more
TL;DR: These studies not only reveal the promise of 3D branched NW photoelectrodes for high efficiency solar energy harvesting and conversion to clean chemical fuels, but also developing understanding enabling rational design of high efficiency robust photocathodes and photoanodes from low-cost and earth-abundant materials.
Journal ArticleDOI
Al-Doped ZnO Thin Film: A New Transparent Conducting Layer for ZnO Nanowire-Based Dye-Sensitized Solar Cells
Sung Hae Lee,Se Hoon Han,Hyun Suk Jung,Hyunjung Shin,Jagab Lee,Jun Hong Noh,Sangwook Lee,In Sun Cho,Jung-Kun Lee,Jin Young Kim,Hyunho Shin +10 more
TL;DR: In this paper, an aluminum-doped zinc oxide layer was used as a transparent conducting oxide (TCO) layer in ZnO nanowire-based dye-sensitized solar cells (DSSCs).
Journal ArticleDOI
Sn-doped ZnO nanocrystalline thin films with enhanced linear and nonlinear optical properties for optoelectronic applications
TL;DR: In this paper, nanocrystalline undoped and Sn doped ZnO thin films with different doping concentrations (1, 3, 5, 7 ) have been deposited on glass substrate by low cost spin coating technique.
Journal ArticleDOI
Hierarchically structured photoelectrodes for dye-sensitized solar cells
Qifeng Zhang,Guozhong Cao +1 more
TL;DR: In this article, the authors highlight several significant achievements in dye-sensitized solar cells using hierarchically structured photoelectrodes that consist of spherical or one-dimensional assemblies of ZnO or TiO2 nanocrystallites.
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.