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
Photovoltaic effect in individual asymmetrically contacted lead sulfide nanosheets
TL;DR: In this article, the influence of the contact metal work function on the properties of transistors based on individual two-dimensional lead sulfide nanosheets was investigated and it was shown that asymmetrically contacted nanoparticles with a thickness of 5.4 nm contacted with platinum and titanium showed a power conversion efficiency of up to 0.94% (EQE 75.70%).
Journal ArticleDOI
Ultrafast dynamics and single particle spectroscopy of Au–CdSe nanorods
Gabriel Sagarzazu,Kohki Inoue,Masaki Saruyama,Masanori Sakamoto,Toshiharu Teranishi,Sadahiro Masuo,Naoto Tamai +6 more
TL;DR: Quantitative analysis of the OFF state decays shows that electron transfer occurs even in the presence of fast non-radiative pathways in charged systems.
Journal ArticleDOI
One-Dimensional Carrier Confinement in “Giant” CdS/CdSe Excitonic Nanoshells
Natalia Razgoniaeva,Pavel Moroz,Mingrui Yang,Darya S. Budkina,Holly Eckard,Marissa Augspurger,Dmitriy Khon,Alexander N. Tarnovsky,Mikhail Zamkov +8 more
TL;DR: An inverse energy-gradient core/shell architecture supporting the quantum confinement in nanoparticles larger than the exciton Bohr radius is developed, which reveals a characteristic size-dependent behavior tunable via the shell thickness with associated quantum yields in the 4.4-16.0% range.
Journal ArticleDOI
Photovoltaics: capturing hot electrons.
TL;DR: The efficiency of photovoltaic materials is compromised by their inability to capture all the energy absorbed when excited by high-energy photons, and now their transfer from excited lead selenide nanocrystals to an electron acceptor provides a necessary initial step towards tapping their 'lost' energy.
Journal ArticleDOI
Enhanced photovoltaic performance of hybrid solar cell using highly oriented CdS/CdSe-modified TiO2 nanorods
TL;DR: In this paper, the photovoltaic performance of the hybrid devices consisting of P3HT/CdS, CdSe, and TiO2 nanorod array was studied.
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.