Global to push GA events into
skip to main content

Title: Synthesis of quantum dots

Common approaches to synthesizing alloyed quantum dots employ high-cost, air-sensitive phosphine complexes as the selenium precursor. Disclosed quantum dot synthesis embodiments avoid these hazardous and air-sensitive selenium precursors. Certain embodiments utilize a combination comprising a thiol and an amine that together reduce and complex the elemental selenium to form a highly reactive selenium precursor at room temperature. The same combination of thiol and amine acts as the reaction solvent, stabilizing ligand, and sulfur source in the synthesis of quantum dot cores. A non-injection approach may also be used. The optical properties of the quantum dots synthesized by this new approach can be finely tuned for a variety of applications by controlling size and/or composition of size and composition. Further, using the same approach, a shell can be grown around a quantum dot core that improves stability, luminescence efficiency, and may reduce toxicity.
Inventors:
Issue Date:
OSTI Identifier:
1400244
Assignee:
Los Alamos National Security, LLC LANL
Patent Number(s):
9,790,425
Application Number:
14/690,152
Contract Number:
AC52-06NA25396
Resource Relation:
Patent File Date: 2015 Apr 17
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Works referenced in this record:

Efficient Synthesis of Highly Luminescent Copper Indium Sulfide-Based Core/Shell Nanocrystals with Surprisingly Long-Lived Emission
journal, February 2011
  • Li, Liang; Pandey, Anshu; Werder, Donald J.
  • Journal of the American Chemical Society, Vol. 133, Issue 5, p. 1176-1179
  • DOI: 10.1021/ja108261h

Tuning Carrier Mobilities and Polarity of Charge Transport in Films of CuInSexS2-x Quantum Dots
journal, January 2015
  • Draguta, Sergiu; McDaniel, Hunter; Klimov, Victor I.
  • Advanced Materials, Vol. 27, Issue 10, p. 1701-1705
  • DOI: 10.1002/adma.201404878

Alkylthiol-Enabled Se Powder Dissolution in Oleylamine at Room Temperature for the Phosphine-Free Synthesis of Copper-Based Quaternary Selenide Nanocrystals
journal, April 2012
  • Liu, Yi; Yao, Dong; Shen, Liang
  • Journal of the American Chemical Society, Vol. 134, Issue 17, p. 7207-7210
  • DOI: 10.1021/ja300064t

Photocharging Artifacts in Measurements of Electron Transfer in Quantum-Dot-Sensitized Mesoporous Titania Films
journal, December 2013
  • Makarov, Nikolay S.; McDaniel, Hunter; Fuke, Nobuhiro
  • The Journal of Physical Chemistry Letters, Vol. 5, Issue 1, p. 111-118
  • DOI: 10.1021/jz402338b

An integrated approach to realizing high-performance liquid-junction quantum dot sensitized solar cells
journal, December 2013
  • McDaniel, Hunter; Fuke, Nobuhiro; Makarov, Nikolay S.
  • Nature Communications, Vol. 4, Article No. 2887
  • DOI: 10.1038%2Fncomms3887

In Vivo Whole Animal Fluorescence Imaging of a Microparticle-Based Oral Vaccine Containing (CuInSexS2–x)/ZnS Core/Shell Quantum Dots
journal, August 2013
  • Panthani, Matthew G.; Khan, Tarik A.; Reid, Dariya K.
  • Nano Letters, Vol. 13, Issue 9, p. 4294-4298
  • DOI: 10.1021%2Fnl402054w

Universal Size-Dependent Trend in Auger Recombination in Direct-Gap and Indirect-Gap Semiconductor Nanocrystals
journal, May 2009

Comparison of the Photovoltaic Response of Oleylamine and Inorganic Ligand-Capped CuInSe2 Nanocrystals
journal, May 2012
  • Stolle, C. Jackson; Panthani, Matthew G.; Harvey, Taylor B.
  • ACS Applied Materials & Interfaces, Vol. 4, Issue 5, p. 2757-2761
  • DOI: 10.1021/am3003846

Nanocrystal photovoltaics: a review of recent progress
journal, May 2013
  • Stolle, C. Jackson; Harvey, Taylor B.; Korgel, Brian A.
  • Current Opinion in Chemical Engineering, Vol. 2, Issue 2, p. 160-167
  • DOI: 10.1016/j.coche.2013.03.001

Near-Band-Edge Electroluminescence from Heavy-Metal-Free Colloidal Quantum Dots
journal, July 2011
  • Tan, Zhanao; Zhang, Yu; Xie, Chuang
  • Advanced Materials, Vol. 23, Issue 31, p. 3553-3558
  • DOI: 10.1002/adma.201100719

Crystal-Bound vs Surface-Bound Thiols on Nanocrystals
journal, September 2014
  • Turo, Michael J.; Macdonald, Janet E.
  • ACS Nano, Vol. 8, Issue 10, p. 10205-10213
  • DOI: 10.1021/nn5032164

The Dominant Role of Exciton Quenching in PbS Quantum-Dot-Based Photovoltaic Devices
journal, November 2013
  • Wanger, Darcy D.; Correa, Raoul E.; Dauler, Eric A.
  • Nano Letters, Vol. 13, Issue 12, p. 5907-5912
  • DOI: 10.1021/nl402886j

Tuning the Luminescence Properties of Colloidal I–III–VI Semiconductor Nanocrystals for Optoelectronics and Biotechnology Applications
journal, October 2012
  • Zhong, Haizheng; Bai, Zelong; Zou, Bingsuo
  • The Journal of Physical Chemistry Letters, Vol. 3, Issue 21, p. 3167-3175
  • DOI: 10.1021/jz301345x