Universal length dependence of rod-to-seed exciton localization efficiency in type i and quasi-type II CdSe@CdS nanorods

Kaifeng Wu, Lawrence J. Hill, Jinquan Chen, James R. McBride, Nicholas G. Pavlopolous, Nathaniel E. Richey, Dong-Chul Pyun, Tianquan Lian

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

A critical step involved in many applications of one-dimensional seeded CdSe@CdS nanorods, such as luminescent solar concentrators, optical gains, and photocatalysis, is the localization of excitons from the light-harvesting CdS nanorod antenna into the light-emitting CdSe quantum dot seed. We report that the rod-to-seed exciton localization efficiency decreases with the rod length but is independent of band alignment between the CdSe seed and CdS rod. This universal dependence can be well modeled by the competition between exciton one-dimensional diffusion to the CdSe seed and trapping on the CdS rod. This finding provides a rational approach for optimizing these materials for their various device applications.

Original languageEnglish (US)
Pages (from-to)4591-4599
Number of pages9
JournalACS Nano
Volume9
Issue number4
DOIs
StatePublished - Apr 28 2015

Fingerprint

Nanorods
Excitons
nanorods
Seed
seeds
rods
excitons
Solar concentrators
Optical gain
Photocatalysis
concentrators
Semiconductor quantum dots
antennas
trapping
alignment
quantum dots
Antennas
LDS 751

Keywords

  • CdSe@CdS
  • exciton diffusion
  • exciton localization
  • luminescent solar concentrator
  • nanoheterostructure
  • nanorods

ASJC Scopus subject areas

  • Engineering(all)
  • Materials Science(all)
  • Physics and Astronomy(all)

Cite this

Wu, K., Hill, L. J., Chen, J., McBride, J. R., Pavlopolous, N. G., Richey, N. E., ... Lian, T. (2015). Universal length dependence of rod-to-seed exciton localization efficiency in type i and quasi-type II CdSe@CdS nanorods. ACS Nano, 9(4), 4591-4599. https://doi.org/10.1021/acsnano.5b01245

Universal length dependence of rod-to-seed exciton localization efficiency in type i and quasi-type II CdSe@CdS nanorods. / Wu, Kaifeng; Hill, Lawrence J.; Chen, Jinquan; McBride, James R.; Pavlopolous, Nicholas G.; Richey, Nathaniel E.; Pyun, Dong-Chul; Lian, Tianquan.

In: ACS Nano, Vol. 9, No. 4, 28.04.2015, p. 4591-4599.

Research output: Contribution to journalArticle

Wu, K, Hill, LJ, Chen, J, McBride, JR, Pavlopolous, NG, Richey, NE, Pyun, D-C & Lian, T 2015, 'Universal length dependence of rod-to-seed exciton localization efficiency in type i and quasi-type II CdSe@CdS nanorods', ACS Nano, vol. 9, no. 4, pp. 4591-4599. https://doi.org/10.1021/acsnano.5b01245
Wu, Kaifeng ; Hill, Lawrence J. ; Chen, Jinquan ; McBride, James R. ; Pavlopolous, Nicholas G. ; Richey, Nathaniel E. ; Pyun, Dong-Chul ; Lian, Tianquan. / Universal length dependence of rod-to-seed exciton localization efficiency in type i and quasi-type II CdSe@CdS nanorods. In: ACS Nano. 2015 ; Vol. 9, No. 4. pp. 4591-4599.
@article{80a3dbcd1d3448a09c177b7e23d0176b,
title = "Universal length dependence of rod-to-seed exciton localization efficiency in type i and quasi-type II CdSe@CdS nanorods",
abstract = "A critical step involved in many applications of one-dimensional seeded CdSe@CdS nanorods, such as luminescent solar concentrators, optical gains, and photocatalysis, is the localization of excitons from the light-harvesting CdS nanorod antenna into the light-emitting CdSe quantum dot seed. We report that the rod-to-seed exciton localization efficiency decreases with the rod length but is independent of band alignment between the CdSe seed and CdS rod. This universal dependence can be well modeled by the competition between exciton one-dimensional diffusion to the CdSe seed and trapping on the CdS rod. This finding provides a rational approach for optimizing these materials for their various device applications.",
keywords = "CdSe@CdS, exciton diffusion, exciton localization, luminescent solar concentrator, nanoheterostructure, nanorods",
author = "Kaifeng Wu and Hill, {Lawrence J.} and Jinquan Chen and McBride, {James R.} and Pavlopolous, {Nicholas G.} and Richey, {Nathaniel E.} and Dong-Chul Pyun and Tianquan Lian",
year = "2015",
month = "4",
day = "28",
doi = "10.1021/acsnano.5b01245",
language = "English (US)",
volume = "9",
pages = "4591--4599",
journal = "ACS Nano",
issn = "1936-0851",
publisher = "American Chemical Society",
number = "4",

}

TY - JOUR

T1 - Universal length dependence of rod-to-seed exciton localization efficiency in type i and quasi-type II CdSe@CdS nanorods

AU - Wu, Kaifeng

AU - Hill, Lawrence J.

AU - Chen, Jinquan

AU - McBride, James R.

AU - Pavlopolous, Nicholas G.

AU - Richey, Nathaniel E.

AU - Pyun, Dong-Chul

AU - Lian, Tianquan

PY - 2015/4/28

Y1 - 2015/4/28

N2 - A critical step involved in many applications of one-dimensional seeded CdSe@CdS nanorods, such as luminescent solar concentrators, optical gains, and photocatalysis, is the localization of excitons from the light-harvesting CdS nanorod antenna into the light-emitting CdSe quantum dot seed. We report that the rod-to-seed exciton localization efficiency decreases with the rod length but is independent of band alignment between the CdSe seed and CdS rod. This universal dependence can be well modeled by the competition between exciton one-dimensional diffusion to the CdSe seed and trapping on the CdS rod. This finding provides a rational approach for optimizing these materials for their various device applications.

AB - A critical step involved in many applications of one-dimensional seeded CdSe@CdS nanorods, such as luminescent solar concentrators, optical gains, and photocatalysis, is the localization of excitons from the light-harvesting CdS nanorod antenna into the light-emitting CdSe quantum dot seed. We report that the rod-to-seed exciton localization efficiency decreases with the rod length but is independent of band alignment between the CdSe seed and CdS rod. This universal dependence can be well modeled by the competition between exciton one-dimensional diffusion to the CdSe seed and trapping on the CdS rod. This finding provides a rational approach for optimizing these materials for their various device applications.

KW - CdSe@CdS

KW - exciton diffusion

KW - exciton localization

KW - luminescent solar concentrator

KW - nanoheterostructure

KW - nanorods

UR - http://www.scopus.com/inward/record.url?scp=84928975756&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84928975756&partnerID=8YFLogxK

U2 - 10.1021/acsnano.5b01245

DO - 10.1021/acsnano.5b01245

M3 - Article

AN - SCOPUS:84928975756

VL - 9

SP - 4591

EP - 4599

JO - ACS Nano

JF - ACS Nano

SN - 1936-0851

IS - 4

ER -