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
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Mesoporous TiO2 beads for high efficiency CdS/CdSe quantum dot co-sensitized solar cells
TL;DR: In this article, mesoporous TiO2 beads with a combined effective light scattering effect and large surface area were prepared and studied for quantum dot-sensitized solar cell (QDSC) application.
Journal ArticleDOI
Quantum confinement-tunable ultrafast charge transfer at the PbS quantum dot and phenyl-C₆₁-butyric acid methyl ester interface.
Ala’a O. El-Ballouli,Erkki Alarousu,Marco Bernardi,Shawkat M. Aly,Alec P. LaGrow,Osman M. Bakr,Omar F. Mohammed +6 more
TL;DR: Investigation of charge transfer and separation at PbS QDs and phenyl-C61-butyric acid methyl ester interfaces using a combination of femtosecond broadband transient absorption (TA) spectroscopy and steady-state photoluminescence quenching measurements demonstrates that charge transfer rates at QD interfaces can be tuned by several orders of magnitude by engineering the QD size distribution.
Journal ArticleDOI
Monodisperse inorganic supraparticles: formation mechanism, properties and applications.
Yunsheng Xia,Zhiyong Tang +1 more
TL;DR: This review summarizes recent progress in the study of formation mechanism, properties and applications of inorganic monodisperse SPs.
Journal ArticleDOI
CuInSe2 and CuInSe2–ZnS based high efficiency “green” quantum dot sensitized solar cells
TL;DR: In this paper, the authors synthesized high quality CuInSe2-based quantum dots via the organic phase high temperature route, and then alloyed with ZnS to form the CISe-ZnS QDs with higher chemical stability and superior optoelectronic properties.
Journal ArticleDOI
Observation of trapped-hole diffusion on the surfaces of CdS nanorods
James K. Utterback,Amanda N. Grennell,Molly B. Wilker,Orion M. Pearce,Joel D. Eaves,Gordana Dukovic +5 more
TL;DR: It is demonstrated that trapped holes in CdS nanorods are mobile and execute a random walk at room temperature and proposed that diffusive trapped-hole motion is a general phenomenon in C dS nanocrystals, but one that is normally obscured in structures in which the wavefunctions of the electron and trapped hole spatially overlap.
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.