skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Methods for preparing colloidal nanocrystal-based thin films

Abstract

Methods of exchanging ligands to form colloidal nanocrystals (NCs) with chalcogenocyanate (xCN)-based ligands and apparatuses using the same are disclosed. The ligands may be exchanged by assembling NCs into a thin film and immersing the thin film in a solution containing xCN-based ligands. The ligands may also be exchanged by mixing a xCN-based solution with a dispersion of NCs, flocculating the mixture, centrifuging the mixture, discarding the supernatant, adding a solvent to the pellet, and dispersing the solvent and pellet to form dispersed NCs with exchanged xCN-ligands. The NCs with xCN-based ligands may be used to form thin film devices and/or other electronic, optoelectronic, and photonic devices. Devices comprising nanocrystal-based thin films and methods for forming such devices are also disclosed. These devices may be constructed by depositing NCs on to a substrate to form an NC thin film and then doping the thin film by evaporation and thermal diffusion.

Inventors:
; ; ; ; ; ; ; ; ;
Issue Date:
Research Org.:
The Trustees of the University of Pennsylvania, Philadelphia, PA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1252203
Patent Number(s):
9,336,919
Application Number:
13/969,863
Assignee:
The Trustees of the University of Pennsylvania (Philadelphia, PA)
DOE Contract Number:  
SC0002158
Resource Type:
Patent
Resource Relation:
Patent File Date: 2013 Aug 19
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY

Citation Formats

Kagan, Cherie R., Fafarman, Aaron T., Choi, Ji-Hyuk, Koh, Weon-kyu, Kim, David K., Oh, Soong Ju, Lai, Yuming, Hong, Sung-Hoon, Saudari, Sangameshwar Rao, and Murray, Christopher B. Methods for preparing colloidal nanocrystal-based thin films. United States: N. p., 2016. Web.
Kagan, Cherie R., Fafarman, Aaron T., Choi, Ji-Hyuk, Koh, Weon-kyu, Kim, David K., Oh, Soong Ju, Lai, Yuming, Hong, Sung-Hoon, Saudari, Sangameshwar Rao, & Murray, Christopher B. Methods for preparing colloidal nanocrystal-based thin films. United States.
Kagan, Cherie R., Fafarman, Aaron T., Choi, Ji-Hyuk, Koh, Weon-kyu, Kim, David K., Oh, Soong Ju, Lai, Yuming, Hong, Sung-Hoon, Saudari, Sangameshwar Rao, and Murray, Christopher B. Tue . "Methods for preparing colloidal nanocrystal-based thin films". United States. https://www.osti.gov/servlets/purl/1252203.
@article{osti_1252203,
title = {Methods for preparing colloidal nanocrystal-based thin films},
author = {Kagan, Cherie R. and Fafarman, Aaron T. and Choi, Ji-Hyuk and Koh, Weon-kyu and Kim, David K. and Oh, Soong Ju and Lai, Yuming and Hong, Sung-Hoon and Saudari, Sangameshwar Rao and Murray, Christopher B.},
abstractNote = {Methods of exchanging ligands to form colloidal nanocrystals (NCs) with chalcogenocyanate (xCN)-based ligands and apparatuses using the same are disclosed. The ligands may be exchanged by assembling NCs into a thin film and immersing the thin film in a solution containing xCN-based ligands. The ligands may also be exchanged by mixing a xCN-based solution with a dispersion of NCs, flocculating the mixture, centrifuging the mixture, discarding the supernatant, adding a solvent to the pellet, and dispersing the solvent and pellet to form dispersed NCs with exchanged xCN-ligands. The NCs with xCN-based ligands may be used to form thin film devices and/or other electronic, optoelectronic, and photonic devices. Devices comprising nanocrystal-based thin films and methods for forming such devices are also disclosed. These devices may be constructed by depositing NCs on to a substrate to form an NC thin film and then doping the thin film by evaporation and thermal diffusion.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2016},
month = {5}
}

Patent:

Save / Share:

Works referenced in this record:

Colloidal Nanocrystals with Molecular Metal Chalcogenide Surface Ligands
journal, June 2009


Colloidal nanocrystal synthesis and the organic–inorganic interface
journal, September 2005

  • Yin, Yadong; Alivisatos, A. Paul
  • Nature, Vol. 437, Issue 7059, p. 664-670
  • DOI: 10.1038/nature04165

Air-Stable, Nanostructured Electronic and Plasmonic Materials from Solution-Processable, Silver Nanocrystal Building Blocks
journal, February 2014

  • Fafarman, Aaron T.; Hong, Sung-Hoon; Oh, Soong Ju
  • ACS Nano, Vol. 8, Issue 3
  • DOI: 10.1021/nn406461p

Chemically Tailored Dielectric-to-Metal Transition for the Design of Metamaterials from Nanoimprinted Colloidal Nanocrystals
journal, December 2012

  • Fafarman, Aaron T.; Hong, Sung-Hoon; Caglayan, Humeyra
  • Nano Letters, Vol. 13, Issue 2
  • DOI: 10.1021/nl303161d

Flexible and low-voltage integrated circuits constructed from high-performance nanocrystal transistors
journal, January 2012

  • Kim, David K.; Lai, Yuming; Diroll, Benjamin T.
  • Nature Communications, Vol. 3, Issue 1
  • DOI: 10.1038/ncomms2218

Stoichiometric Control of Lead Chalcogenide Nanocrystal Solids to Enhance Their Electronic and Optoelectronic Device Performance
journal, February 2013

  • Oh, Soong Ju; Berry, Nathaniel E.; Choi, Ji-Hyuk
  • ACS Nano, Vol. 7, Issue 3
  • DOI: 10.1021/nn3057356

Thiocyanate-Capped PbS Nanocubes: Ambipolar Transport Enables Quantum Dot Based Circuits on a Flexible Substrate
journal, November 2011

  • Koh, Weon-kyu; Saudari, Sangameshwar R.; Fafarman, Aaron T.
  • Nano Letters, Vol. 11, Issue 11
  • DOI: 10.1021/nl202578g

Thiocyanate-Capped Nanocrystal Colloids: Vibrational Reporter of Surface Chemistry and Solution-Based Route to Enhanced Coupling in Nanocrystal Solids
journal, October 2011

  • Fafarman, Aaron T.; Koh, Weon-kyu; Diroll, Benjamin T.
  • Journal of the American Chemical Society, Vol. 133, Issue 39
  • DOI: 10.1021/ja206303g

Bandlike Transport in Strongly Coupled and Doped Quantum Dot Solids: A Route to High-Performance Thin-Film Electronics
journal, April 2012

  • Choi, Ji-Hyuk; Fafarman, Aaron T.; Oh, Soong Ju
  • Nano Letters, Vol. 12, Issue 5
  • DOI: 10.1021/nl301104z