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Title: Synthesis of Type I PbSe/CdSe Dot-on-Plate Heterostructures with Near-Infrared Emission

Abstract

Zero-dimensional PbSe quantum dots are heterogeneously nucleated and grown onto two-dimensional zincblende CdSe nanoplatelets. Electron microscopy shows ad-grown dots predominantly decorate edges and corners of the nanoplatelets. Spectroscopic characterizations relate type I electronic alignment as demonstrated via photoluminescence excitation spectroscopy enhancement of near-infrared emission. Transient photoluminescence and absorption convey ultrafast transfer of excitons to the lower energy semiconductor dots. Furthermore these structures combine benefits of large absorption cross sections of nanoplatelets and efficient near-infrared emission of PbSe with quantum confinement tuning of energy gap.

Authors:
 [1]; ORCiD logo [2];  [1];  [3]; ORCiD logo [1];  [3]; ORCiD logo [4]
  1. Northwestern Univ., Evanston, IL (United States)
  2. Argonne National Lab. (ANL), Lemont, IL (United States)
  3. Univ. of Illinois at Chicago, Chicago, IL (United States)
  4. Northwestern Univ., Evanston, IL (United States); Argonne National Lab. (ANL), Lemont, IL (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF)
OSTI Identifier:
1510305
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Journal of the American Chemical Society
Additional Journal Information:
Journal Volume: 141; Journal Issue: 13; Journal ID: ISSN 0002-7863
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Williams, Kali R., Diroll, Benjamin T., Watkins, Nicolas E., Rui, Xue, Brumberg, Alexandra, Klie, Robert F., and Schaller, Richard D. Synthesis of Type I PbSe/CdSe Dot-on-Plate Heterostructures with Near-Infrared Emission. United States: N. p., 2019. Web. doi:10.1021/jacs.8b13794.
Williams, Kali R., Diroll, Benjamin T., Watkins, Nicolas E., Rui, Xue, Brumberg, Alexandra, Klie, Robert F., & Schaller, Richard D. Synthesis of Type I PbSe/CdSe Dot-on-Plate Heterostructures with Near-Infrared Emission. United States. doi:10.1021/jacs.8b13794.
Williams, Kali R., Diroll, Benjamin T., Watkins, Nicolas E., Rui, Xue, Brumberg, Alexandra, Klie, Robert F., and Schaller, Richard D. Mon . "Synthesis of Type I PbSe/CdSe Dot-on-Plate Heterostructures with Near-Infrared Emission". United States. doi:10.1021/jacs.8b13794.
@article{osti_1510305,
title = {Synthesis of Type I PbSe/CdSe Dot-on-Plate Heterostructures with Near-Infrared Emission},
author = {Williams, Kali R. and Diroll, Benjamin T. and Watkins, Nicolas E. and Rui, Xue and Brumberg, Alexandra and Klie, Robert F. and Schaller, Richard D.},
abstractNote = {Zero-dimensional PbSe quantum dots are heterogeneously nucleated and grown onto two-dimensional zincblende CdSe nanoplatelets. Electron microscopy shows ad-grown dots predominantly decorate edges and corners of the nanoplatelets. Spectroscopic characterizations relate type I electronic alignment as demonstrated via photoluminescence excitation spectroscopy enhancement of near-infrared emission. Transient photoluminescence and absorption convey ultrafast transfer of excitons to the lower energy semiconductor dots. Furthermore these structures combine benefits of large absorption cross sections of nanoplatelets and efficient near-infrared emission of PbSe with quantum confinement tuning of energy gap.},
doi = {10.1021/jacs.8b13794},
journal = {Journal of the American Chemical Society},
number = 13,
volume = 141,
place = {United States},
year = {2019},
month = {3}
}

Journal Article:
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This content will become publicly available on March 18, 2020
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