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
Suppression of photocorrosion in CdS/CdSe quantum dot-sensitized solar cells: Formation of a thin polymer layer on the photoelectrode surface
Wonjoo Lee,Wonjoo Lee,Hae Jung Son,Doh Kwon Lee,Bongsoo Kim,Bongsoo Kim,Honggon Kim,Honggon Kim,Kyungkon Kim,Min Jae Ko,Min Jae Ko +10 more
TL;DR: In this paper, a thin poly(ethyleneoxide) (PEO) layer is formed on the quantum dot (QDs) film using coordination bonding between the ether group in the PEO and Cd metal ions in the QDs, acting as passivation layer to suppress substitution reaction and anodic oxidation.
Journal ArticleDOI
CdTe Quantum Dots in Ionic Liquid: Stability and Hole Scavenging in the Presence of a Sulfide Salt
M. Chandra Sekhar,Kotni Santhosh,Jaini Praveen Kumar,Navendu Mondal,S. Soumya,Anunay Samanta +5 more
TL;DR: In this paper, the authors explore the stability of a CdTe QD in ionic liquids, in 1-butyl-3methylimidazolium hexafluorophosphate ionic liquid in the presence of S2 and investigate the hole transfer process from this photoexcited QD to S2.
Journal ArticleDOI
Single wall carbon nanotube/titania nanocomposite photoanodes enhance the photovoltaic performance of cadmium selenide quantum dot-sensitized solar cells
TL;DR: In this paper, the photovoltaic performance of CdSe quantum dots sensitized solar cells (QDSSCs) using 0.2% of single walled carbon nanotubes/Titania (SWCNTs/TiO2) nanocomposite photoanode is reported.
Journal ArticleDOI
Strain-Driven Stacking Faults in CdSe/CdS Core/Shell Nanorods
Arnaud Demortière,Arnaud Demortière,Arnaud Demortière,Donovan N. Leonard,Valeri Petkov,Karena W. Chapman,Soma Chattopadhyay,Chunxing She,David A. Cullen,Tomohiro Shibata,Matthew Pelton,Matthew Pelton,Elena V. Shevchenko +12 more
TL;DR: This work studies CdSe/CdS core/shell nanorods as a model system to investigate the influence of core size and shape on the formation of stacking faults in the nanocrystal and shows that growth of the CdS shell on smaller, spherical Cd Se cores results in relatively small strain and few stacking faults.
Journal ArticleDOI
Performances of some low-cost counter electrode materials in CdS and CdSe quantum dot-sensitized solar cells.
TL;DR: The electrochemical impedance spectroscopy performed on the cells showed that the poor-performing QDSSCs had higher charge-transfer resistances and CPE values at their CE/electrolyte interfaces.
References
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Journal ArticleDOI
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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.
Journal ArticleDOI
Carbon Nanotubes--the Route Toward Applications
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The Optical Properties of Metal Nanoparticles: The Influence of Size, Shape, and Dielectric Environment
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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.