Inverted core/shell nanocrystals continuously tunable between type-I and type-II localization regimes

L. P. Balet, S. A. Ivanov, A. Piryatinski, M. Achermann, Victor I Klimov

Research output: Contribution to journalArticle

199 Citations (Scopus)

Abstract

We study inverted core/shell nanocrystals (NCs) in which a core of a wide gap semiconductor (ZnSe) is overcoated with a shell of a semiconductor of a narrower gap (CdSe). By monitoring radiative recombination lifetimes for a series of these NCs with a fixed core radius and progressively increasing shell thickness, we observe a continuous transition from Type-I (both electron and hole wave functions are distributed over the entire NC) to Type-II (electron and hole are spatially separated between the shell and the core) and back to Type-I (both electron and hole primarily reside in the shell) localization regimes. These observations are in good agreement with the calculated dependence of the electron-hole overlap integral on shell thickness.

Original languageEnglish
Pages (from-to)1485-1488
Number of pages4
JournalNano Letters
Volume4
Issue number8
DOIs
Publication statusPublished - Aug 2004

Fingerprint

Nanocrystals
nanocrystals
Electrons
Semiconductor materials
electrons
radiative recombination
Wave functions
Electron transitions
wave functions
life (durability)
radii
Monitoring

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Inverted core/shell nanocrystals continuously tunable between type-I and type-II localization regimes. / Balet, L. P.; Ivanov, S. A.; Piryatinski, A.; Achermann, M.; Klimov, Victor I.

In: Nano Letters, Vol. 4, No. 8, 08.2004, p. 1485-1488.

Research output: Contribution to journalArticle

Balet, L. P. ; Ivanov, S. A. ; Piryatinski, A. ; Achermann, M. ; Klimov, Victor I. / Inverted core/shell nanocrystals continuously tunable between type-I and type-II localization regimes. In: Nano Letters. 2004 ; Vol. 4, No. 8. pp. 1485-1488.
@article{4d66cf15401c4d459a62ae22418f6fdd,
title = "Inverted core/shell nanocrystals continuously tunable between type-I and type-II localization regimes",
abstract = "We study inverted core/shell nanocrystals (NCs) in which a core of a wide gap semiconductor (ZnSe) is overcoated with a shell of a semiconductor of a narrower gap (CdSe). By monitoring radiative recombination lifetimes for a series of these NCs with a fixed core radius and progressively increasing shell thickness, we observe a continuous transition from Type-I (both electron and hole wave functions are distributed over the entire NC) to Type-II (electron and hole are spatially separated between the shell and the core) and back to Type-I (both electron and hole primarily reside in the shell) localization regimes. These observations are in good agreement with the calculated dependence of the electron-hole overlap integral on shell thickness.",
author = "Balet, {L. P.} and Ivanov, {S. A.} and A. Piryatinski and M. Achermann and Klimov, {Victor I}",
year = "2004",
month = "8",
doi = "10.1021/nl049146c",
language = "English",
volume = "4",
pages = "1485--1488",
journal = "Nano Letters",
issn = "1530-6984",
publisher = "American Chemical Society",
number = "8",

}

TY - JOUR

T1 - Inverted core/shell nanocrystals continuously tunable between type-I and type-II localization regimes

AU - Balet, L. P.

AU - Ivanov, S. A.

AU - Piryatinski, A.

AU - Achermann, M.

AU - Klimov, Victor I

PY - 2004/8

Y1 - 2004/8

N2 - We study inverted core/shell nanocrystals (NCs) in which a core of a wide gap semiconductor (ZnSe) is overcoated with a shell of a semiconductor of a narrower gap (CdSe). By monitoring radiative recombination lifetimes for a series of these NCs with a fixed core radius and progressively increasing shell thickness, we observe a continuous transition from Type-I (both electron and hole wave functions are distributed over the entire NC) to Type-II (electron and hole are spatially separated between the shell and the core) and back to Type-I (both electron and hole primarily reside in the shell) localization regimes. These observations are in good agreement with the calculated dependence of the electron-hole overlap integral on shell thickness.

AB - We study inverted core/shell nanocrystals (NCs) in which a core of a wide gap semiconductor (ZnSe) is overcoated with a shell of a semiconductor of a narrower gap (CdSe). By monitoring radiative recombination lifetimes for a series of these NCs with a fixed core radius and progressively increasing shell thickness, we observe a continuous transition from Type-I (both electron and hole wave functions are distributed over the entire NC) to Type-II (electron and hole are spatially separated between the shell and the core) and back to Type-I (both electron and hole primarily reside in the shell) localization regimes. These observations are in good agreement with the calculated dependence of the electron-hole overlap integral on shell thickness.

UR - http://www.scopus.com/inward/record.url?scp=4444319418&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=4444319418&partnerID=8YFLogxK

U2 - 10.1021/nl049146c

DO - 10.1021/nl049146c

M3 - Article

AN - SCOPUS:4444319418

VL - 4

SP - 1485

EP - 1488

JO - Nano Letters

JF - Nano Letters

SN - 1530-6984

IS - 8

ER -