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

L. P. Balet; S. A. Ivanov; A. Piryatinski; M. Achermann; V. I. Klimov

doi:10.1021/nl049146c

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

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

Los Alamos National Laboratory

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

212 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 language	English
Pages (from-to)	1485-1488
Number of pages	4
Journal	Nano letters
Volume	4
Issue number	8
DOIs	https://doi.org/10.1021/nl049146c
Publication status	Published - Aug 1 2004

ASJC Scopus subject areas

Bioengineering
Chemistry(all)
Materials Science(all)
Condensed Matter Physics
Mechanical Engineering

Access to Document

10.1021/nl049146c

Fingerprint Dive into the research topics of 'Inverted core/shell nanocrystals continuously tunable between type-I and type-II localization regimes'. Together they form a unique fingerprint.

Cite this

@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, {V. I.}",

year = "2004",

month = aug,

day = "1",

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, V. I.

PY - 2004/8/1

Y1 - 2004/8/1

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 -

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

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Cite this