Journal ArticleDOI
Quantum Dot Solar Cells. Semiconductor Nanocrystals as Light Harvesters
TLDR
In this paper, three major ways to utilize semiconductor dots in solar cell include (i) metal−semiconductor or Schottky junction photovoltaic cell, (ii) polymer−smiconductor hybrid solar cell, and (iii) quantum dot sensitized solar cell.Abstract:
The emergence of semiconductor nanocrystals as the building blocks of nanotechnology has opened up new ways to utilize them in next generation solar cells. This paper focuses on the recent developments in the utilization of semiconductor quantum dots for light energy conversion. Three major ways to utilize semiconductor dots in solar cell include (i) metal−semiconductor or Schottky junction photovoltaic cell (ii) polymer−semiconductor hybrid solar cell, and (iii) quantum dot sensitized solar cell. Modulation of band energies through size control offers new ways to control photoresponse and photoconversion efficiency of the solar cell. Various strategies to maximize photoinduced charge separation and electron transfer processes for improving the overall efficiency of light energy conversion are discussed. Capture and transport of charge carriers within the semiconductor nanocrystal network to achieve efficient charge separation at the electrode surface remains a major challenge. Directing the future resear...read more
Citations
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Interfacial carrier dynamics in PbS-ZnO light harvesting assemblies and their potential implication in photovoltaic/ photocatalysis application
TL;DR: In this article, the authors have investigated PbS-ZnO light harvesting assemblies (LHAs) that can lead to efficient photovoltaics and demonstrated that fundamental, ultrafast photoinduced charge separation and charge recombination processes at the semiconductor-semiconductor interface are key factors for the dual application of LHAs.
Journal ArticleDOI
Optimum quantum dot size for highly efficient fluorescence bioimaging
Laura Martínez Maestro,Carlos Jacinto,Uéslen Rocha,M. Carmen Iglesias-de la Cruz,Francisco Sanz-Rodríguez,Angeles Juarranz,José García Solé,Daniel Jaque +7 more
TL;DR: In this paper, the size dependence of the fluorescence quantum yield of the highly thermal sensitive CdTe quantum dots has been systematically investigated by thermal lens spectroscopy, and it has been found that an optimum quantum yield is reached for 3.8-nm quantum dots.
Journal ArticleDOI
Self-Assembled Structures of Semiconductor Nanocrystals and Polymers for Photovoltaics. 2. Multilayers of CdSe Nanocrystals and Oligo(poly)thiophene-Based Molecules. Optical, Electrochemical, Photoelectrochemical, and Photoconductive Properties
Gianni Zotti,Barbara Vercelli,A. Berlin,Mariacecilia Pasini,Toby L. Nelson,Richard D. McCullough,Tersilla Virgili +6 more
TL;DR: A series of terthiophene and sexithiophene α,ω-dicarboxylic and -diphosphonic acids were reacted with hexadecylamine-capped CdSe nanoparticles (6 or 75 nm diameter) in CHCl3 to form regular polymeric structures on ITO-glass surfaces via layer-by-layer alternation as mentioned in this paper.
Journal ArticleDOI
Gold Cluster Coverage Effect on H 2 Productionover Rutile TiO 2 (110)
TL;DR: Unlike catalytic reactions thermally driven by metal nanoparticles, reaction rates in photocatalysis do not scale with either the density of nanoparticles or their size as mentioned in this paper, which is a limitation of catalytic reaction.
Journal ArticleDOI
Enhancement of Efficiency in Quantum Dot Sensitized Solar Cells Based on CdS/CdSe/CdSeTe Heterostructure by Improving the Light Absorption in the VIS-NIR Region
Diego Esparza,Diego Esparza,Tzarara López-Luke,Jorge Oliva,Andrea Cerdán-Pasarán,Alejandro Martínez-Benítez,Iván Mora-Seró,Elder De la Rosa +7 more
TL;DR: In this article, the authors demonstrate an enhancement of photocurrent in QDSSCs based on CdS (QDs)/CdSe Quantum rods (QRs) and CdSeTe (QD) heterostructure due to the increased photon harvesting in the VIS-NIR region.
References
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Journal ArticleDOI
Detailed Balance Limit of Efficiency of p‐n Junction Solar Cells
TL;DR: In this article, an upper theoretical limit for the efficiency of p−n junction solar energy converters, called the detailed balance limit of efficiency, has been calculated for an ideal case in which the only recombination mechanism of holeelectron pairs is radiative as required by the principle of detailed balance.
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Carbon Nanotubes--the Route Toward Applications
TL;DR: Many potential applications have been proposed for carbon nanotubes, including conductive and high-strength composites; energy storage and energy conversion devices; sensors; field emission displays and radiation sources; hydrogen storage media; and nanometer-sized semiconductor devices, probes, and interconnects.
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Polymer photovoltaic cells : enhanced efficiencies via a network of internal donor-acceptor heterojunctions
TL;DR: In this paper, the carrier collection efficiency and energy conversion efficiency of polymer photovoltaic cells were improved by blending of the semiconducting polymer with C60 or its functionalized derivatives.
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The Optical Properties of Metal Nanoparticles: The Influence of Size, Shape, and Dielectric Environment
TL;DR: In this paper, the authors describe recent progress in the theory of nanoparticle optical properties, particularly methods for solving Maxwell's equations for light scattering from particles of arbitrary shape in a complex environment.
Journal ArticleDOI
Semiconductor Nanocrystals as Fluorescent Biological Labels
TL;DR: Semiconductor nanocrystals prepared for use as fluorescent probes in biological staining and diagnostics have a narrow, tunable, symmetric emission spectrum and are photochemically stable.