Bound 1D excitons in single CdSe quantum wires

Virginia L. Wayman; Paul J. Morrison; Fudong Wang; Rui Tang; William E. Buhro; Richard A. Loomis

doi:10.1021/jz301210a

Bound 1D excitons in single CdSe quantum wires

Virginia L. Wayman, Paul J. Morrison, Fudong Wang, Rui Tang, William E. Buhro, Richard A. Loomis

Biophotonics Research Center

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

14 Scopus citations

Abstract

Photogenerated electron-hole pairs are observed to be bound as 1D excitons in CdSe quantum wires (QWs) at room temperature. Microscopy experiments performed on dilute samples of CdSe QWs prepared on coverslips with patterned electrodes reveal that there is no change in either the overall photoluminescence (PL) intensity or the distribution of the PL intensity with the application of an external electric field. Changes in the PL intensity, and thus evidence for separate charge carriers within the QWs, are observed only for concentrated samples. In these concentrated samples, a thin film of other compounds, including trioctylphosphine oxide and a bismuth salt formed in the synthesis, is observed to encompass the QWs. The separate charge carriers that influence the PL intensity are attributed to the other compounds in the sample.

Original language	English
Pages (from-to)	2627-2632
Number of pages	6
Journal	Journal of Physical Chemistry Letters
Volume	3
Issue number	18
DOIs	https://doi.org/10.1021/jz301210a
State	Published - Sep 20 2012

Keywords

Physical Processes in Nanomaterials and Nanostructures

Access to Document

10.1021/jz301210a

Cite this

@article{4ea5e6b66a694b299315cf9c502dc49a,

title = "Bound 1D excitons in single CdSe quantum wires",

abstract = "Photogenerated electron-hole pairs are observed to be bound as 1D excitons in CdSe quantum wires (QWs) at room temperature. Microscopy experiments performed on dilute samples of CdSe QWs prepared on coverslips with patterned electrodes reveal that there is no change in either the overall photoluminescence (PL) intensity or the distribution of the PL intensity with the application of an external electric field. Changes in the PL intensity, and thus evidence for separate charge carriers within the QWs, are observed only for concentrated samples. In these concentrated samples, a thin film of other compounds, including trioctylphosphine oxide and a bismuth salt formed in the synthesis, is observed to encompass the QWs. The separate charge carriers that influence the PL intensity are attributed to the other compounds in the sample.",

keywords = "Physical Processes in Nanomaterials and Nanostructures",

author = "Wayman, {Virginia L.} and Morrison, {Paul J.} and Fudong Wang and Rui Tang and Buhro, {William E.} and Loomis, {Richard A.}",

year = "2012",

month = sep,

day = "20",

doi = "10.1021/jz301210a",

language = "English",

volume = "3",

pages = "2627--2632",

journal = "Journal of Physical Chemistry Letters",

issn = "1948-7185",

number = "18",

}

TY - JOUR

T1 - Bound 1D excitons in single CdSe quantum wires

AU - Wayman, Virginia L.

AU - Morrison, Paul J.

AU - Wang, Fudong

AU - Tang, Rui

AU - Buhro, William E.

AU - Loomis, Richard A.

PY - 2012/9/20

Y1 - 2012/9/20

N2 - Photogenerated electron-hole pairs are observed to be bound as 1D excitons in CdSe quantum wires (QWs) at room temperature. Microscopy experiments performed on dilute samples of CdSe QWs prepared on coverslips with patterned electrodes reveal that there is no change in either the overall photoluminescence (PL) intensity or the distribution of the PL intensity with the application of an external electric field. Changes in the PL intensity, and thus evidence for separate charge carriers within the QWs, are observed only for concentrated samples. In these concentrated samples, a thin film of other compounds, including trioctylphosphine oxide and a bismuth salt formed in the synthesis, is observed to encompass the QWs. The separate charge carriers that influence the PL intensity are attributed to the other compounds in the sample.

AB - Photogenerated electron-hole pairs are observed to be bound as 1D excitons in CdSe quantum wires (QWs) at room temperature. Microscopy experiments performed on dilute samples of CdSe QWs prepared on coverslips with patterned electrodes reveal that there is no change in either the overall photoluminescence (PL) intensity or the distribution of the PL intensity with the application of an external electric field. Changes in the PL intensity, and thus evidence for separate charge carriers within the QWs, are observed only for concentrated samples. In these concentrated samples, a thin film of other compounds, including trioctylphosphine oxide and a bismuth salt formed in the synthesis, is observed to encompass the QWs. The separate charge carriers that influence the PL intensity are attributed to the other compounds in the sample.

KW - Physical Processes in Nanomaterials and Nanostructures

UR - http://www.scopus.com/inward/record.url?scp=84866629913&partnerID=8YFLogxK

U2 - 10.1021/jz301210a

DO - 10.1021/jz301210a

M3 - Article

C2 - 26295882

AN - SCOPUS:84866629913

SN - 1948-7185

VL - 3

SP - 2627

EP - 2632

JO - Journal of Physical Chemistry Letters

JF - Journal of Physical Chemistry Letters

IS - 18

ER -

Bound 1D excitons in single CdSe quantum wires

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this