Journal ArticleDOI
Quantum dot sensitization of organic-inorganic hybrid solar cells
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TLDR
A high surface area pn-heterojunction between TiO2 and an organic p-type charge transport material (spiro-OMeTAD) was sensitized to visible light using lead sulfide (PbS) quantum dots as mentioned in this paper.Abstract:
A high surface area pn-heterojunction between TiO2 and an organic p-type charge transport material (spiro-OMeTAD) was sensitized to visible light using lead sulfide (PbS) quantum dots. PbS quantum dots were formed in situ on a nanocrystalline TiO2 electrode using chemical bath deposition techniques.1 The organic hole conductor was applied from solution to form the sensitized heterojunction. The structure of the quantum dots was analyzed using HRTEM technique. Ultrafast laser photolysis experiments suggested the initial charge separation to proceed in the subpicosecond time range. Transient absorption laser spectroscopy revealed that interfacial charge recombination of the initially formed charge carriers is much faster than in comparable dye-sensitized systems.2,3 The sensitized heterojunction showed incident photon-to-electron conversion efficiencies (IPCE) of up to 45% and energy conversion efficiencies under simulated sunlight AM1.5 (10 mW/cm2) of 0.49%.read more
Citations
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Carrier generation and collection in CdS/CdSe-sensitized SnO2 solar cells exhibiting unprecedented photocurrent densities.
TL;DR: CdS/CdSe-sensitized nanostructured SnO(2) solar cells exhibiting record short-circuit photocurrent densities have been fabricated and exhibit higher IPCEs compared with TiO( 2)-based SSCs which, considering the similar light harvesting efficiencies and the long electron diffusion lengths implied by IS, is likely to be due to a superior charge separation yield.
Journal ArticleDOI
Shell Thickness Dependent Photocatalytic Properties of ZnO/CdS Core–Shell Nanorods
TL;DR: In this article, a core/shell nanorod arrays of ZnO/CdS with varying shell thickness and their shell thickness dependent photocatalytic properties have been investigated.
Journal ArticleDOI
Colloidal quantum dot solar cells
TL;DR: In this paper, a review of colloidal quantum dot solar cells is presented, where the authors discuss the preparation methods, working concepts, advantages and disadvantages of different device architectures, including Schottky solar cells, depleted heterojunction solar cells and extremely thin absorber solar cells.
Journal ArticleDOI
Photoeletrocatalytic activity of a Cu2O-loaded self-organized highly oriented TiO2 nanotube array electrode for 4-chlorophenol degradation.
TL;DR: The improved photoeletrocatalytic activity of the TiO 2/Cu2O composite array electrode is attributed to the synergistic effect of Cu2O nanoparticles and TiO2 nanotube arrays.
Journal ArticleDOI
Band Gap Tuning of ZnO/In 2 S 3 Core/Shell Nanorod Arrays for Enhanced Visible-Light-Driven Photocatalysis
TL;DR: In this article, an efficient and environmentally benign one-dimensional ZnO/In2S3 core/shell nanostructure was used as a photocatalyst to overcome the drawback of low photocatalytic efficiency brought by electron-hole recombination and narrow photoresponse range.
References
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Journal ArticleDOI
Solid-state dye-sensitized mesoporous TiO2 solar cells with high photon-to-electron conversion efficiencies
Udo Bach,D. Lupo,Pascal Comte,Jacques-E. Moser,F. Weissörtel,Josef Salbeck,H. Spreitzer,Michael Grätzel +7 more
TL;DR: A dye-sensitized heterojunction of TiO2 with the amorphous organic hole-transport material 2,2′,7,7′-tetrakis(N,N-di-p-methoxyphenyl-amine)9,9′-spirobifluorene (OMeTAD) was described in this article.
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Quantum-Sized PbS, CdS, Ag2S, Sb2S3, and Bi2S3 Particles as Sensitizers for Various Nanoporous Wide-Bandgap Semiconductors
R. Vogel,P. Hoyer,Horst Weller +2 more
TL;DR: In this article, the photocurrent quantum yield reached values of more than 70% for Q-CdS and Q-PbS sensitized electrodes, while the amount of light absorption is negligibly small.
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Photosensitization of nanoporous TiO2 electrodes with InP quantum dots
TL;DR: In this paper, a photoelectrochemical cell was formed that consisted of p-type InP QDs loaded on TiO2, which was immersed in a I-/I3- or hydroquinone/quinone acetonitrile solution, and a Pt counter electrode.
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High efficiency solid-state photovoltaic device due to inhibition of interface charge recombination
TL;DR: In this paper, the performance of dye-sensitized solar cells based on spiro-MeOTAD was improved by controlling charge recombination across the interface of the heterojunction.
Journal ArticleDOI
Highly efficient semiconducting TiO2 photoelectrodes prepared by aerosol pyrolysis
Ladislav Kavan,Michael Grätzel +1 more
TL;DR: In this article, a comparison of optical and photoelectrochemical properties of the TiO2 layer indicates a relative enhancement of light harvesting efficiency due to lowering of reflection losses in the electrolyte.