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
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Journal ArticleDOI
Dye-Sensitized Solar Cells
TL;DR: Dye-sensitized solar cells (DSCs) offer the possibilities to design solar cells with a large flexibility in shape, color, and transparency as mentioned in this paper, and many DSC research groups have been established around the world.
Journal ArticleDOI
Coaxial silicon nanowires as solar cells and nanoelectronic power sources
Bozhi Tian,Xiaolin Zheng,Thomas J. Kempa,Ying Fang,Nanfang Yu,Guihua Yu,Jinlin Huang,Charles M. Lieber +7 more
TL;DR: These coaxial silicon nanowire photovoltaic elements provide a new nanoscale test bed for studies of photoinduced energy/charge transport and artificial photosynthesis, and might find general usage as elements for powering ultralow-power electronics and diverse nanosystems.
Journal ArticleDOI
Growth of oriented single-crystalline rutile TiO(2) nanorods on transparent conducting substrates for dye-sensitized solar cells.
Bin Liu,Eray S. Aydil +1 more
TL;DR: A facile, hydrothermal method was developed for the first time to grow oriented, single-crystalline rutile TiO(2) nanorod films on transparent conductive fluorine-doped tin oxide (FTO) substrates.
Journal ArticleDOI
Meeting the Clean Energy Demand: Nanostructure Architectures for Solar Energy Conversion
TL;DR: In this article, three major ways to utilize nanostructures for the design of solar energy conversion devices are discussed: (i) mimicking photosynthesis with donor−acceptor molecular assemblies or clusters, (ii) semiconductor assisted photocatalysis to produce fuels such as hydrogen, and (iii) nanostructure semiconductor based solar cells.
Journal ArticleDOI
Inorganic Materials as Catalysts for Photochemical Splitting of Water
TL;DR: A review of the known inorganic catalysts with a focus on structure-activity relationships is given in this article, where the first water splitting system based on TiO2 and Pt was proposed by Fujishima and Honda in 1972.
References
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Journal ArticleDOI
Electrochemical and photoelectrochemical investigation of single-crystal anatase
TL;DR: In this article, the electrochemical and photoelectrochemical behavior of a single crystal of anatase was scrutinized for the first time, and it was shown that anatase (101) and rutile (001) electrodes differ mainly in the position of the...
Journal ArticleDOI
Excitonic Solar Cells
TL;DR: In this article, the authors distinguish between conventional solar cells and excitonic solar cells (XSCs) by showing that charge carriers are generated and simultaneously separated across a heterointerface.
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Electrons in nanostructured TiO2 solar cells: Transport, recombination and photovoltaic properties
TL;DR: In this paper, a review highlights several significant advancements in understanding of electron transport and recombination in dye-sensitized nanostructured TiO 2 solar cells and the limitations that these processes impose on cell performance.
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Design of new coumarin dyes having thiophene moieties for highly efficient organic-dye-sensitized solar cells
Kohjiro Hara,Mitsuhiko Kurashige,Yasufumi Dan-oh,Chiaki Kasada,Akira Shinpo,Sadaharu Suga,Kazuhiro Sayama,Hironori Arakawa +7 more
TL;DR: In this paper, the coumarin dyes having thiophene moieties were developed to improve the photovoltaic performance of dye-sensitized nanocrystalline TiO2 solar cells based on the organic dyes as photosensitizers.
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A 5% efficient photoelectrochemical solar cell based on nanostructured ZnO electrodes
TL;DR: In this paper, Nanoporous ZnO electrodes, dye-sensitized with a ruthenium bipyridyl complex, were used as photoanodes in photoelectrochemical solar cells.