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; Jeffrey Pyun; Tianquan Lian

doi:10.1021/acsnano.5b01245

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
, Jeffrey Pyun^*
, Tianquan Lian

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

103 Scopus citations

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 language	English
Pages (from-to)	4591-4599
Number of pages	9
Journal	ACS Nano
Volume	9
Issue number	4
DOIs	https://doi.org/10.1021/acsnano.5b01245
State	Published - 28 Apr 2015
Externally published	Yes

Keywords

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

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10.1021/acsnano.5b01245

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@article{ceaa355a4113487e864ed49f2d37e00b,

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 Jeffrey Pyun and Tianquan Lian",

note = "Publisher Copyright: {\textcopyright} 2015 American Chemical Society.",

year = "2015",

month = apr,

day = "28",

doi = "10.1021/acsnano.5b01245",

language = "英语",

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, Jeffrey

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 - https://www.scopus.com/pages/publications/84928975756

U2 - 10.1021/acsnano.5b01245

DO - 10.1021/acsnano.5b01245

M3 - 文章

AN - SCOPUS:84928975756

SN - 1936-0851

VL - 9

SP - 4591

EP - 4599

JO - ACS Nano

JF - ACS Nano

IS - 4

ER -

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

Abstract

Keywords

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