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Journal ArticleDOI

Quantum Dot Solar Cells. Semiconductor Nanocrystals as Light Harvesters

Prashant V. Kamat
- 18 Oct 2008 - 
- Vol. 112, Iss: 48, pp 18737-18753
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...

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Citations
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Journal ArticleDOI

Quasi-type II CuInS2/CdS core/shell quantum dots

TL;DR: Both single and multiple exciton lifetimes are significantly extended in quasi-type II CuInS2/CdS core/shell QDs.
Journal ArticleDOI

CdS nanocapsules and nanospheres as efficient solar light-driven photocatalysts for degradation of Congo red dye

TL;DR: In this article, the formation of nanospheres (CdS-1) and nanocapsules from complexes 1 and 2, respectively, were characterized by TEM, XRD, SEM, FT-IR UV-Visible and Fluorescence spectroscopy.
Journal ArticleDOI

Fast Regeneration of CdSe Quantum Dots by Ru Dye in Sensitized TiO2 Electrodes

TL;DR: In this paper, the effect of colloidal CdSe quantum dots (QDs) and polypyridyl ruthenium dyes employed as cosensitizers of mesoporous TiO2 electrodes as well as the effects of QDs coating and anchoring mode (direct and linker adsorption) have been investigated by photoluminesce (PL), Raman, and transient absorption (TAS) spectroscopies.
Journal ArticleDOI

Hybrid semiconductor nanoparticles: π-conjugated ligands and nanostructured films

TL;DR: In this paper, a hybrid inorganic-organic colloidal nanoparticles can be designed to achieve specific and complementary optoelectronic properties different from their sole organic and inorganic counterparts.
Journal ArticleDOI

Modeling charge recombination in dye-sensitized solar cells using first-principles electron dynamics: effects of structural modification

TL;DR: By inserting a phenyl ring into the organic dye, the charge recombination rate is slowed down by about four times, while the injection rate keeps almost the same, which introduces a drastic increase in the energy conversion efficiency.
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.
Journal ArticleDOI

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.
Journal ArticleDOI

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.
Journal ArticleDOI

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.
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