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
Tuning electron transfer rates through molecular bridges in quantum dot sensitized oxides.
TL;DR: This work quantitatively surveyed photoinduced electron transfer processes from semiconductor quantum dots molecularly bridged to a mesoporous oxide phase using optical pump-terahertz probe spectroscopy and shows that electron transfer occurs as a nonresonant quantum tunneling process.
Journal ArticleDOI
Hybrid-type quantum-dot cosensitized ZnO nanowire solar cell with enhanced visible-light harvesting.
TL;DR: High open-circuit voltage and fill factor values of the hybrid quantum-dot-sensitized solar cell indicate that the applied hole transport layer efficiently dissociates electron/hole pairs at the interface and retards the interfacial charge recombination.
Journal ArticleDOI
Luminescent Polymer Composite Films Containing Coal-Derived Graphene Quantum Dots
TL;DR: Luminescent polymer composite materials, based on poly(vinyl alcohol) (PVA), as a matrix polymer and graphene quantum dots (GQDs) derived from coal, were prepared by casting from aqueous solutions and exhibit solid state fluorescence.
Journal ArticleDOI
Opto-electro-modulated transient photovoltage and photocurrent system for investigation of charge transport and recombination in solar cells.
TL;DR: An opto-electro-modulated transient photovoltage/photocurrent system has been developed to probe microscopic charge processes of a solar cell in its adjustable operating conditions and the influence of the hole transport material layer on charge extraction and the microscopic charges behind the widely considered photoelectric hysteresis in perovskite solar cells are studied.
Journal ArticleDOI
Fabrication of CuInTe2 and CuInTe(2-x)Se(x) ternary gradient quantum dots and their application to solar cells.
Sungwoo Kim,Meejae Kang,Seajin Kim,Jin Hyuk Heo,Jun Hong Noh,Sang Hyuk Im,Sang Il Seok,Sang-Wook Kim +7 more
TL;DR: The first synthesis of colloidal CuInTe2, Cu inTe2-xSex gradient alloyed quantum dots (QDs) through a simple hot injection method is reported, which confirmed the composition of synthesized QDs to cationic rich phase of CuIn1.5Te2.5 and Cu0.23In0.36Te0.19Se0.22 QDs.
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.