Journal ArticleDOI
A low-cost, high-efficiency solar cell based on dye-sensitized colloidal TiO2 films
TLDR
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.Abstract:
THE large-scale use of photovoltaic devices for electricity generation is prohibitively expensive at present: generation from existing commercial devices costs about ten times more than conventional methods1. Here we describe a photovoltaic cell, created from low-to medium-purity materials through low-cost processes, which exhibits a commercially realistic energy-conversion efficiency. The device is based on a 10-µm-thick, optically transparent film of titanium dioxide particles a few nanometres in size, coated with a monolayer of a charge-transfer dye to sensitize the film for light harvesting. Because of the high surface area of the semiconductor film and the ideal spectral characteristics of the dye, the device harvests a high proportion of the incident solar energy flux (46%) and shows exceptionally high efficiencies for the conversion of incident photons to electrical current (more than 80%). The overall light-to-electric energy conversion yield is 7.1-7.9% in simulated solar light and 12% in diffuse daylight. The large current densities (greater than 12 mA cm-2) and exceptional stability (sustaining at least five million turnovers without decomposition), as well as the low cost, make practical applications feasible.read more
Citations
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Journal ArticleDOI
Graphene in Photocatalysis: A Review
TL;DR: Through reviewing the significant advances on this topic, it may provide new opportunities for designing highly efficient 2D graphene-based photocatalysts for various applications in photocatalysis and other fields, such as solar cells, thermal catalysis, separation, and purification.
Journal ArticleDOI
Review on dye-sensitized solar cells (DSSCs): Fundamental concepts and novel materials
TL;DR: The dye-sensitized solar cells (DSSCs) as mentioned in this paper are the most efficient and easily implemented technology for photovoltaic devices, and they have low module cost and easy fabrication.
Journal ArticleDOI
Dye Sensitization of Nanocrystalline Tin Oxide by Perylene Derivatives
TL;DR: In this paper, a new sensitizing dye−semiconductor system comprised of perylene derivatives on SnO2 has been characterized and shown to yield a short circuit photocurrent density of 3.26 mA/cm2, a photovoltage of −0.45 V, and overall cell efficiency of 0.89% at one sun light intensity.
Journal ArticleDOI
Mechanism of carrier accumulation in perovskite thin-absorber solar cells
Hui-Seon Kim,Iván Mora-Seró,Victoria González-Pedro,Francisco Fabregat-Santiago,Emilio J. Juarez-Perez,Nam-Gyu Park,Juan Bisquert +6 more
TL;DR: A fingerprint of the charge accumulation in high density of states of the perovskite absorber material has been observed at the capacitance of the samples, indicating that it constitutes a new kind of photovoltaic device, differentiated from sensitized solar cells, which will require its own methods of study, characterization and optimization.
Journal ArticleDOI
Dye-Sensitized Core−Shell Nanocrystals: Improved Efficiency of Mesoporous Tin Oxide Electrodes Coated with a Thin Layer of an Insulating Oxide
Andreas Kay and,Michael Grätzel +1 more
TL;DR: In this paper, different methods for coating SnO2 nanocrystals with a thin layer of an insulating oxide were compared, and the best results were obtained by adding a soluble metal salt.
References
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Electrochemical Photolysis of Water at a Semiconductor Electrode
Akira Fujishima,Kenichi Honda +1 more
TL;DR: Water photolysis is investigated by exploiting the fact that water is transparent to visible light and cannot be decomposed directly, but only by radiation with wavelengths shorter than 190 nm.
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Ru(II) polypyridine complexes: photophysics, photochemistry, eletrochemistry, and chemiluminescence
Alberto Juris,Vincenzo Balzani,F. Barigelletti,Sebastiano Campagna,Peter Belser,A. Von Zelewsky +5 more
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Vectorial electron injection into transparent semiconductor membranes and electric field effects on the dynamics of light-induced charge separation
TL;DR: In this article, the dynamics of charge recombination following electron injection from the excited state of RuL{sub 3} into the conduction band of the semiconductor were examined under potentiostatic control of the electric field within the space charge layer of the membrane.
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The impact of semiconductors on the concepts of electrochemistry
TL;DR: In this article, it was realized that semiconductor electrodes behave differently in many respects and offer new insights into the role played by the electronic properties of a solid in its electrochemical reactivity.
Journal ArticleDOI
Electrochemistry and photochemistry of MoS2 layer crystals. I
H. Tributsch,J.C. Bennett +1 more
TL;DR: In this article, the chemical and photochemical behavior of MoS 2 -van der Waals surfaces in contact with an aqueous electrolyte has been investigated by means of electrochemical techniques.