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
Synthesis of branched 'nanotrees' by controlled seeding of multiple branching events
Kimberly A. Dick,Knut Deppert,Magnus Larsson,Thomas Mårtensson,Werner Seifert,L. Reine Wallenberg,Lars Samuelson +6 more
TL;DR: It is shown, by high-resolution transmission electron microscopy, that the branching mechanism gives continuous crystalline (monolithic) structures throughout the extended and complex tree-like structures.
Journal ArticleDOI
Studies of Surface Wettability Conversion on TiO2 Single-Crystal Surfaces
TL;DR: In this article, a UV light illuminated TiO2 single-crystal surface exhibited a 0° contact angle for both water and oil, indicative of a highly amphiphilic surface against its native hydrophobic surface.
Journal ArticleDOI
Supramolecular halogen bond passivation of organic-inorganic halide perovskite solar cells.
Antonio Abate,Michael Saliba,Derek J. Hollman,Samuel D. Stranks,Konrad Wojciechowski,Roberto Avolio,Giulia Grancini,Annamaria Petrozza,Henry J. Snaith +8 more
TL;DR: It is shown that trap states at the perovskite surface generate charge accumulation and consequent recombination losses in working solar cells and the surface passivation introduces an important direction for future progress in perovkite solar cells.
Journal ArticleDOI
Photoelectrochemical and Optical Properties of Nitrogen Doped Titanium Dioxide Films Prepared by Reactive DC Magnetron Sputtering
Torbjörn Lindgren,Julius M. Mwabora,E. Avendaño,Jacob Jonsson,Anders Hoel,Claes-Göran Granqvist,Sten-Eric Lindquist +6 more
TL;DR: In this paper, Nanocrystalline porous porous nitrogen doped titanium dioxide (TiO2) thin films were prepared by DC magnetron sputtering and characterized by X-ray diffraction, scanning electron microscopy, and optical and photoelectrochemical (PEC) measurements.
Journal ArticleDOI
Organolead Halide Perovskite: New Horizons in Solar Cell Research
TL;DR: In this paper, a perovskite light harvester is designed based on the function of the perovsite, where the general formula of this perov-tex3 is RPbX3, where R and X stand for a monovalent organic cation and halide anion, respectively.
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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Vectorial electron injection into transparent semiconductor membranes and electric field effects on the dynamics of light-induced charge separation
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The impact of semiconductors on the concepts of electrochemistry
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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.