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
Shape control of colloidal Mn doped ZnO nanocrystals and their visible light photocatalytic properties
Yefeng Yang,Yaguang Li,Liping Zhu,Haiping He,Liang Hu,Jingyun Huang,Fengchun Hu,Bo He,Zhizhen Ye +8 more
TL;DR: A facile and green synthetic approach for high-quality colloidal Mn doped ZnO NCs with simultaneous control over composition, shape and optical properties is reported, which provides an improved understanding of the growth mechanism of doped NCs during the growth process.
Journal ArticleDOI
How does a silar cdse film grow? Tuning the deposition steps to suppress interfacial charge recombination in solar cells
TL;DR: Step-by-step SILAR deposition of CdSe films on mesoscopic TiO2 nanoparticle films is analyzed using X-ray absorption near-edge structure analysis and the interfacial structure of these films is probed.
Journal ArticleDOI
Electrochemical construction of hierarchically ordered CdSe-sensitized TiO2 nanotube arrays: towards versatile photoelectrochemical water splitting and photoredox applications
TL;DR: It was demonstrated that the CdSe/NP-TNTAs heterostructure could be utilized as an efficient photoanode for photoelectrochemical water splitting and could be used as a multifunctional photocatalyst for photoredox applications.
Journal ArticleDOI
Improved performance of quantum dot-sensitized solar cells adopting a highly efficient cobalt sulfide/nickel sulfide composite thin film counter electrode
Hee-Je Kim,Su-Weon Kim,Chandu V. V. Muralee Gopi,Soo-Kyoung Kim,S. Srinivasa Rao,Myeong-Soo Jeong +5 more
TL;DR: In this paper, cobalt sulfide/nickel sulfide nanoparticles were used as counter electrodes for polysulfide redox reactions in CdS/CdSe quantum dot-sensitized solar cells.
Journal ArticleDOI
Optical Properties and Exciton Dynamics of Alloyed Core/Shell/Shell Cd1–xZnxSe/ZnSe/ZnS Quantum Dots
Bob C. Fitzmorris,Ying-Chih Pu,Jason K. Cooper,Yi Fang Lin,Yung-Jung Hsu,Yat Li,Jin Z. Zhang +6 more
TL;DR: It is determined that surface passivation by ZnSe and Zn Se/ZnS shells reduces nonradiative recombination primarily on the picosecond time scale and is helpful in directing the development of the next generation of QDs for biological labeling and other applications.
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.