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
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Journal ArticleDOI
Current improvement in hybrid quantum dot sensitized solar cells by increased light-scattering with a polymer layer
TL;DR: In this paper, the effect of the incorporation of a material with efficient electron transport into a hybrid Quantum Dot Sensitized Solar Cell (HyQDSSC) was investigated and the performance of different quantum dot sensitized solar cells was compared with a cell containing poly [(9,9-bis(3′-(N,N-dimethylamino)propyl)-2,7-fluorene)-alt-2, 7-(9, 9-dioctylfluorene)] (PFN) with structure TiO2/PbS/PFN
Reference EntryDOI
Dye–Sensitized Solar Cells: An Overview
TL;DR: In this article, the main features of dye-sensitized solar cells (DSCs), explaining their structure and working principles, and highlighting the characteristics of the main materials for high-performance DSCs are described.
Journal ArticleDOI
Vertically aligned CdTe nanotube arrays on indium tin oxide for visible-light-driven photoelectrocatalysis
TL;DR: In this paper, a photoelectrocatalysis mechanism based on the energy diagram was proposed for the CdTe nanotube arrays with visible-light-driven photo-catalytic activity on ITO substrate via a simple ZnO nanorod-templating method.
Journal ArticleDOI
Synthesis of heteroarchitectures of PbS nanostructures well-erected on electrospun TiO2 nanofibers
TL;DR: The experiment results showed that the morphology and size of secondary PbS nanostructures grown on TiO(2) nanofibers can be changed significantly by utilizing two kinds of different reaction solvents (water and acetylacetone, respectively), and suggested that the formation of TiO (2)/PbS heteroarchitectures might take on chelation-anchoring-nucleation-directional growth strategy.
Journal ArticleDOI
Nanobasierte Energiegewinnung in autarken Mikro‐/Nanosystemen
Zhong Lin Wang,Wenzhuo Wu +1 more
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.
Journal ArticleDOI
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.
Journal ArticleDOI
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.
Journal ArticleDOI
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.