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
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Controlled Fabrication of PbS Quantum-Dot/Carbon-Nanotube Nanoarchitecture and its Significant Contribution to Near-Infrared Photon-to-Current Conversion
Defa Wang,Jayanta K. Baral,Haiguang Zhao,Belete Atomsa Gonfa,Vo-Van Truong,My Ali El Khakani,Ricardo Izquierdo,Dongling Ma +7 more
TL;DR: In this article, a solution-processed nano-architecture based on PbS quantum dots (QDs) and multi-walled carbon nanotubes (MWCNTs) is synthesized by simply mixing the pre-synthesized high-quality QDs and oleylamine (OLA) pre-functionalized MWCNTs.
Journal ArticleDOI
Tracking Nanoparticle Diffusion and Interaction during Self-Assembly in a Liquid Cell
Alexander S. Powers,Hong-Gang Liao,Shilpa N. Raja,Noah D. Bronstein,A. Paul Alivisatos,Haimei Zheng +5 more
TL;DR: The results illustrate that long-range anisotropic forces drive the formation of chains, which then clump and fold to maximize close range van der Waals interactions.
Journal ArticleDOI
High-efficiency InAs/GaAs quantum dot solar cells by metalorganic chemical vapor deposition
TL;DR: In this article, a self-assembled InAs/GaAs quantum dot (QD) solar cell was constructed by metalorganic chemical vapor deposition (MOCVD) to suppress open-circuit voltage degradation.
Journal ArticleDOI
Study of surface and bulk electronic structure of II-VI semiconductor nanocrystals using Cu as a nanosensor.
TL;DR: A novel method to study the band offsets by associating an atomic like state with the conduction band and hence obtaining an internal standard is devised and results are in excellent agreement with the available photoelectron spectroscopy data as well as the theoretical data.
Journal ArticleDOI
Boosting the Open Circuit Voltage and Fill Factor of QDSSCs Using Hierarchically Assembled ITO@Cu2S Nanowire Array Counter Electrodes
Yan Jiang,Bin-Bin Yu,Jie Liu,Zhi-Hua Li,Jian-Kun Sun,Xinhua Zhong,Jin-Song Hu,Weiguo Song,Li-Jun Wan +8 more
TL;DR: H hierarchically assembled ITO@Cu2S nanowire arrays with conductive single-crystalline ITO cores and Cu2Snanocrystal shells were designed as efficient QDSSCs CEs, which exhibited an unprecedentedly high Voc and shunt resistance.
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.