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Structure And Band Edge Energy Of Highly Luminescent CdSe1–xTex Alloyed Quantum Dots
B. Hou, David Parker, Gabriela P. Kissling, J. A. Jones, D. Cherns, D. Fermín
Published 2013 · Materials Science
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CdSe1–xTex quantum dot (QD) alloys are characterized by high luminescence quantum yields and a strong band gap bowing as a function of the Se:Te ratio, featuring longer emission wavelengths than CdTe or CdSe dots of identical size. In this contribution, these properties are rationalized by examining the structure and band edge energy of CdSe1–xTex as functions of x. The QDs were synthesized employing the “hot-injection” method, in the presence of either trioctylphosphine oxide (TOPO) or octadecene (ODE) as the Cd precursor solvent. Elementary analysis of the QDs indicated that TOPO plays a crucial role in tuning the content of Se in the alloys, as only traces of this element were found when using ODE. Detailed studies based on X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM) and selected area electron diffraction (SAED) revealed a high degree of complexity in the structure of the alloyed dots. The analysis concluded that the structure of the QDs was essentially wurtzite, a...
This paper references
Formation and stability of size-, shape-, and structure-controlled CdTe nanocrystals: Ligand effects on monomers and nanocrystals
W. Yu (2003)
Determination of the Electronic Energetics of CdTe Nanoparticle Assemblies on Au Electrodes by Photoemission, Electrochemical, and Photocurrent Studies
Y. Wang (2012)
Photoemission Measurements of the Valence Levels of Amorphous SiO 2
T. Distefano (1971)
Electronic structure and optical properties of CdSexTe1−x mixed crystals
L. Hannachi (2008)
Electron-electron and electron-hole interactions in small semiconductor crystallites : The size dependence of the lowest excited electronic state
L. Brus (1984)
Perspectives on the Physical Chemistry of Semiconductor Nanocrystals
A. P. Alivisatos (1996)
Self-assembled binary superlattices of CdSe and Au nanocrystals and their fluorescence properties.
E. Shevchenko (2008)
Electronic states of semiconductor clusters: Homogeneous and inhomogeneous broadening of the optical spectrum
A. P. Alivisatos (1988)
High‐Yield Fabrication and Electrochemical Characterization of Tetrapodal CdSe, CdTe, and CdSexTe1–x Nanocrystals
Y. Li (2006)
Alloyed semiconductor quantum dots: tuning the optical properties without changing the particle size.
R. E. Bailey (2003)
Electrochemical hole injection into the valence band of thiol stabilised CdTe quantum dots.
Gabriela P. Kissling (2009)
A simple model for the ionization potential, electron affinity, and aqueous redox potentials of small semiconductor crystallites
L. Brus (1983)
Investigations on structural phase transition in hot wall deposited CdSexTe1−x thin films
N. Muthukumarasamy (2007)
Determination of band structure parameters and the quasi-particle gap of CdSe quantum dots by cyclic voltammetry.
Shaukatali N. Inamdar (2008)
Crystal structure control of zinc-blende CdSe/CdS core/shell nanocrystals: synthesis and structure-dependent optical properties.
Wennuan Nan (2012)
Composition-tunable alloyed semiconductor nanocrystals.
M. Regulacio (2010)
First-principles calculation of band offsets, optical bowings, and defects in CdS, CdSe, CdTe, and their alloys
S. Wei (2000)
Size-dependent valence and conduction band-edge energies of semiconductor nanocrystals.
J. Jasieniak (2011)
Electronic wave functions in semiconductor clusters: experiment and theory
L. Brus (1986)
Composition-tunable Zn(x)Cd(1-x)Se nanocrystals with high luminescence and stability.
Xinhua Zhong (2003)
Experimental Determination of the Extinction Coefficient of CdTe, CdSe, and CdS Nanocrystals
W. W. Yu (2003)
Formation of high-quality CdS and other II-VI semiconductor nanocrystals in noncoordinating solvents: tunable reactivity of monomers.
W. Yu (2002)
The Effect of Alloying on the Bandgap Energy of Nanoscaled Semiconductor Alloys
Y. Zhu (2008)
Relativistic band structure of ternary II-VI semiconductor alloys containing Cd, Zn, Se and Te
H. C. Poon (1995)
Photoinduced Electron Transfer at Liquid/Liquid Interfaces. Part VI. On the Thermodynamic Driving Force Dependence of the Phenomenological Electron-Transfer Rate Constant
Nicolas Eugster (2002)
Variation of Nd and Vfb for different compositions of CdSexTe1−x thin films by pulse plating technique
V. Saaminathan (2004)
Photoelectrochemical Determination of the Absolute Band Edge Positions as a Function of Particle Size for ZnO Quantum Dots
T. J. Jacobsson (2012)
Shape tuning of type II CdTe-CdSe colloidal nanocrystal heterostructures through seeded growth.
Haizheng Zhong (2009)
Formation of high-quality CdTe, CdSe, and CdS nanocrystals using CdO as precursor.
Z. Peng (2001)
Synthesis and Characterization of Monodisperse Nanocrystals and Close-Packed Nanocrystal Assemblies
C. Murray (2000)
Electrogenerated Chemiluminescence of CdSe Nanocrystals
N. Myung (2002)
Electrochemistry and electrogenerated chemiluminescence of CdTe nanoparticles
Yoonjung Bae (2004)
Quantum Dot Solar Cells. Semiconductor Nanocrystals as Light Harvesters
P. Kamat (2008)
Electronic structure of ZnS, ZnSe, ZnTe, and their pseudobinary alloys.
Air-Stable All-Inorganic Nanocrystal Solar Cells Processed from Solution
Ilan Gur (2005)
Evolution of the electronic structure with size in II-VI semiconductor nanocrystals
S. Sapra (2004)
Shell-Tunneling Spectroscopy of the Single-Particle Energy Levels of Insulating Quantum Dots
E. Bakkers (2001)
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John Hong (2016)
CdTe(1-x)Se(x)/Cd0.5Zn0.5S core/shell quantum dots: core composition and property.
P. Yang (2014)
Effect of Gradient Alloying on Photoluminescence Blinking of Single CdSxSe1–x Nanocrystals
S. Dey (2016)
Highly Monodispersed PbS Quantum Dots for Outstanding Cascaded-Junction Solar Cells
Bo Hou (2016)
Near-infrared CdSexTe1-x@CdS “giant” quantum dots for efficient photoelectrochemical hydrogen generation
Guiju Liu (2018)
Highly luminescent red emitting CdZnSe/ZnSe quantum dots synthesis and application for quantum dot light emitting diodes
Q. Zhang (2017)
Aqueous synthesis of alloyed CdSexTe1-x colloidal quantum dots and their In-situ assembly within mesoporous TiO2 for solar cells
Xiaohui Song (2020)
Three-dimensional nanoflower-like hierarchical array of multifunctional copper cobaltate electrode as efficient electrocatalyst for oxygen evolution reaction and energy storage application.
A. A. Yadav (2020)
Quantum Dots Microstructural Metrology: From Time‐Resolved Spectroscopy to Spatially Resolved Electron Microscopy
Hasna Kudilatt (2020)
Molecular dynamics study on composition and temperature dependences of mechanical properties of CdTeSe nanowires under uniaxial stretching
Bilal Köylüoğlu (2019)
Investigating the Effect of Nanoscale Changes on the Chemistry and Energetics of Nanocrystals with a Novel Photoemission Spectroscopy Methodology
M. W. Liao (2017)
Photoelectrochemical properties of BiOCl microplatelets
J. Stephenson (2017)
Self-assembled two-dimensional copper oxide nanosheet bundles as an efficient oxygen evolution reaction (OER) electrocatalyst for water splitting applications
S. Pawar (2017)
Nanograin tungsten oxide with excess oxygen as a highly reversible anode material for high-performance Li-ion batteries
A. I. Inamdar (2018)
Red green blue emissive lead sulfide quantum dots: heterogeneous synthesis and applications.
B. Hou (2017)
Cobalt Nanocrystals Encapsulated in Heteroatom-Rich Porous Carbons Derived from Conjugated Microporous Polymers for Efficient Electrocatalytic Hydrogen Evolution.
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Impact of one step alloying on the carrier relaxation and charge separation dynamics of CdxZn1-xSe graded nanocrystals
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Direct growth of 2D nickel hydroxide nanosheets intercalated with polyoxovanadate anions as a binder-free supercapacitor electrode.
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Band Edge Energetics of Heterostructured Nanorods: Photoemission Spectroscopy and Waveguide Spectroelectrochemistry of Au-Tipped CdSe Nanorod Monolayers.
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