Journal ArticleDOI
Quantum Dot Solar Cells. Semiconductor Nanocrystals as Light Harvesters
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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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Journal ArticleDOI
Non-Nernstian two-electron transfer photocatalysis at metalloporphyrin-TiO2 interfaces.
TL;DR: A strategy for the two-electron formation of C-C bonds with molecular catalysts anchored to semiconductor nanocrystallites is provided and behavior attributed to an environmentally dependent potential drop across the molecule-semiconductor interface is indicated.
Journal ArticleDOI
Fast and easy synthesis of core-shell nanocrystal (CdS/TiO2) at low temperature by micro-emulsion under ultrasound.
TL;DR: CdS nanoparticles were easily combined with TiO(2) through a reaction in micro-emulsion by means of ultrasonic irradiation, led to an increase of the size of nanoparticles due to the appearance of a core-shell structure between the two combined semiconductors with a strong interface between them.
Journal ArticleDOI
TiO2 Sensitization with Bi2S3 Quantum Dots: The Inconvenience of Sodium Ions in the Deposition Procedure
TL;DR: In this article, the authors highlight the inconvenience of sodium ions in the Bi2S3 deposition procedure, on the TiO2 surface, for the conversion efficiency of the sensitized solar cells derived from these materials.
Journal ArticleDOI
Transforming energy using quantum dots
Haipeng Lu,Zhiyuan Huang,Marissa S. Martinez,Justin C. Johnson,Joseph M. Luther,Matthew C. Beard +5 more
TL;DR: In this paper, the authors summarize recent progress using QDs in energy conversion architectures with the express goal of transforming optical energy to other forms of energy, including electricity, photons with different energies, and chemical bonds.
Journal ArticleDOI
Single-step fabrication of quantum funnels via centrifugal colloidal casting of nanoparticle films
Jin Young Kim,Jin Young Kim,Valerio Adinolfi,Brandon R. Sutherland,Oleksandr Voznyy,S. Joon Kwon,Tae Wu Kim,Jeongho Kim,Hyotcherl Ihee,Kyle W. Kemp,Michael M. Adachi,Mingjian Yuan,Illan J. Kramer,David Zhitomirsky,Sjoerd Hoogland,Edward H. Sargent +15 more
TL;DR: The first quantum-gradient photodiode to be formed in a single deposition step is constructed and the highest normalized detectivity of any colloidal quantum dot photodetector is measured.
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.
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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.