Journal ArticleDOI
Efficient synthesis of highly luminescent copper indium sulfide-based core/shell nanocrystals with surprisingly long-lived emission
Liang Li,Anshu Pandey,Donald J. Werder,Bishnu P. Khanal,Jeffrey M. Pietryga,Victor I. Klimov +5 more
TLDR
On the basis of time-resolved spectroscopic studies of core/shell particles, it is concluded that the emission is due to an optical transition that couples a quantized electron state to a localized hole state, which is most likely associated with an internal defect.Abstract:
We report an efficient synthesis of copper indium sulfide nanocrystals with strong photoluminescence in the visible to near-infrared. This method can produce gram quantities of material with a chemical yield in excess of 90% with minimal solvent waste. The overgrowth of as-prepared nanocrystals with a few monolayers of CdS or ZnS increases the photoluminescence quantum efficiency to > 80%. On the basis of time-resolved spectroscopic studies of core/shell particles, we conclude that the emission is due to an optical transition that couples a quantized electron state to a localized hole state, which is most likely associated with an internal defect.read more
Citations
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Journal ArticleDOI
Colloidal Quantum Dot Solar Cells.
Graham H. Carey,Ahmed L. Abdelhady,Zhijun Ning,Susanna M. Thon,Osman M. Bakr,Edward H. Sargent +5 more
TL;DR: This paper presents a meta-modelling system that automates the very labor-intensive and therefore time-heavy and expensive and therefore expensive and expensive process of designing and installing solar panels.
Journal ArticleDOI
Quantum Dot Solar Cells. The Next Big Thing in Photovoltaics.
TL;DR: The recent advances as well as future prospects of quantum dot solar cells discussed in this perspective provide the basis for consideration as "The Next Big Thing" in photovoltaics.
Journal ArticleDOI
Spectroscopic and Device Aspects of Nanocrystal Quantum Dots
Jeffrey M. Pietryga,Young-Shin Park,Young-Shin Park,Jaehoon Lim,Andrew F. Fidler,Wan Ki Bae,Sergio Brovelli,Victor I. Klimov +7 more
TL;DR: Recent advances in nanocrystal research related to applications of QD materials in lasing, light-emitting diodes (LEDs), and solar energy conversion are examined.
Journal ArticleDOI
Compound Copper Chalcogenide Nanocrystals
TL;DR: This review captures the synthesis, assembly, properties, and applications of copper chalcogenide NCs, which have achieved significant research interest in the last decade due to their compositional and structural versatility.
Journal ArticleDOI
The Role of Ligands in the Chemical Synthesis and Applications of Inorganic Nanoparticles.
Amelie Heuer-Jungemann,Neus Feliu,Neus Feliu,Ioanna Bakaimi,Majd A. Hamaly,Alaaldin M. Alkilany,Alaaldin M. Alkilany,Indranath Chakraborty,Atif Masood,Maria Francesca Casula,Athanasia Kostopoulou,Eunkeu Oh,Kimihiro Susumu,Michael H. Stewart,Igor L. Medintz,Emmanuel Stratakis,Wolfgang J. Parak,Antonios G. Kanaras +17 more
TL;DR: This article analyzes the interaction of nanoparticle surface and ligands with different chemical groups, the types of bonding, the final dispersibility of ligand-coated nanoparticles in complex media, their reactivity, and their performance in biomedicine, photodetectors, photovoltaic devices, light-emitting devices, sensors, memory devices, thermoelectric applications, and catalysis.
References
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Journal ArticleDOI
Synthesis of CuInS2, CuInSe2, and Cu(InxGa1-x)Se2 (CIGS) Nanocrystal “Inks” for Printable Photovoltaics
Matthew G. Panthani,Vahid A. Akhavan,Brian W. Goodfellow,Johanna P. Schmidtke,Lawrence Dunn,Ananth Dodabalapur,Paul F. Barbara,Brian A. Korgel +7 more
TL;DR: Using methods developed to produce uniform, crack-free micrometer-thick films, CulnSe2 nanocrystals were tested in prototype photovoltaic devices and exhibited a reproducible photvoltaic response.
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Optical Nonlinearities and Ultrafast Carrier Dynamics in Semiconductor Nanocrystals
TL;DR: In this article, a nonphonon energy relaxation mechanism involving electron−hole (e−h) spatial separation strongly affects electron intraband dynamics in CdSe nanocrystals with a variety of surface passivations.
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Formation of high-quality I-III-VI semiconductor nanocrystals by tuning relative reactivity of cationic precursors.
TL;DR: The versatility of the synthetic strategy was demonstrated by extending it to the synthesis of AgInS(2) nanocrystals by simply replacing the copper salt by a silver salt.
Journal ArticleDOI
Highly Luminescent CuInS2/ZnS Core/Shell Nanocrystals: Cadmium-Free Quantum Dots for In Vivo Imaging
TL;DR: In this article, strongly luminescent core/shell nanocrystals were synthesized from copper iodide, indium acetate, zinc stearate, and dodecanethiol as starting compounds in octadecene solvent.
Journal ArticleDOI
Electron and hole relaxation pathways in semiconductor quantum dots
TL;DR: In this paper, femtosecond (fs) broadband transient absorption (TA) is used to study the intraband relaxation and depopulation dynamics of electron and hole quantized states in CdSe nanocrystals with a range of surface properties.