Journal ArticleDOI
Quantum Dot Solar Cells. Semiconductor Nanocrystals as Light Harvesters
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
Highly efficient and stable quantum dot-sensitized solar cells based on a Mn-doped CuS counter electrode
Chandu V. V. Muralee Gopi,Mallineni Venkata-Haritha,Soo-Kyoung Kim,S. Srinivasa Rao,Dinah Punnoose,Hee-Je Kim +5 more
TL;DR: In this article, a Mn-doped counter electrode via a facile chemical bath deposition was presented, which exhibited an efficiency of 5.46% comparable to the solar cell based on the bare CuS electrode (4.29%) and Pt electrode (1.37%) under similar conditions.
Journal ArticleDOI
Excited-State Dynamics in Two-Dimensional Heterostructures: SiR/TiO2 and GeR/TiO2 (R = H, Me) as Promising Photocatalysts
A. Nijamudheen,Alexey V. Akimov +1 more
TL;DR: In this paper, the electronic structure and excited-state dynamics of heterojunctions composed of 2D silicane and germanane-based materials (SiR, GeR; R = H, Me) and anatase or rutile isomorphs of TiO2 are investigated.
Journal ArticleDOI
CuInS2 quantum dot sensitized solar cells with high VOC ≈ 0.9 V achieved using microsphere-nanoparticulate TiO2 composite photoanode
TL;DR: In this article, the authors used 3-mercaptopropionic acid in a single phase one-step procedure to enable efficient loading of QDs onto photoanode and as linker molecule for charge carrier extraction.
Journal ArticleDOI
Influence of Hole-Sequestering Ligands on the Photostability of CdSe Quantum Dots
TL;DR: In this article, small organic molecules acting as hole-accepting ligands can be very effective in reducing photooxidation of CdSe QDs, and the aromatic amine, 4-dimethylaminothiophenol (DMATP), is shown to be especially effective in enhancing the stability of QD-sensitized solar cells when illuminated in air or in aqueous environments.
Journal ArticleDOI
Fabrication of CuInS2-sensitized solar cells via an improved SILAR process and its interface electron recombination.
Xueqing Xu,Qingcui Wan,Chunyan Luan,Fengjiao Mei,Qian Zhao,Ping An,Liang Zhurong,Gang Xu,Juan Antonio Zapien +8 more
TL;DR: It is indicated that the unoccupied states in CIS with energy levels below EF0 of the TiO2 films play an important role in the interface electron recombination at low potentials and has a great influence on the fill factor of the solar cells.
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.
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.