Electrical injection in longitudinal and coaxial heterostructure nanowires

A comparative study through a three-dimensional simulation

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

We carried out a comparative study of electrical injection in longitudinal p-i-n and coaxial p-n core-shell nanowires by performing a three-dimensional numerical simulation. In the case of the core-shell structure, we show that both electrons and holes of high density can be efficiently injected into and confined in the structure even without an i-region. The required bias voltage and doping concentrations in the core-shell structure are smaller than those in the longitudinal p-i-n structure to achieve the same carrier injection level. Furthermore, we show that a type-I band alignment, as required in traditional p-i-n structure is not necessary in core-shell structure, allowing more flexibility in nanowire devices design. Our results thus provide a theoretical foundation and understanding that a core-shell structure is far superior to the longitudinal p-i-n structure for electrical injection nanowire lasers.

Original languageEnglish (US)
Pages (from-to)4234-4237
Number of pages4
JournalNano Letters
Volume8
Issue number12
DOIs
StatePublished - Dec 2008
Externally publishedYes

Fingerprint

Nanowires
Heterojunctions
nanowires
injection
simulation
Bias voltage
Doping (additives)
carrier injection
Electrons
Lasers
Computer simulation
flexibility
alignment
electric potential
lasers
electrons

ASJC Scopus subject areas

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

Cite this

@article{22704165611c43a8a335256250e1bfea,
title = "Electrical injection in longitudinal and coaxial heterostructure nanowires: A comparative study through a three-dimensional simulation",
abstract = "We carried out a comparative study of electrical injection in longitudinal p-i-n and coaxial p-n core-shell nanowires by performing a three-dimensional numerical simulation. In the case of the core-shell structure, we show that both electrons and holes of high density can be efficiently injected into and confined in the structure even without an i-region. The required bias voltage and doping concentrations in the core-shell structure are smaller than those in the longitudinal p-i-n structure to achieve the same carrier injection level. Furthermore, we show that a type-I band alignment, as required in traditional p-i-n structure is not necessary in core-shell structure, allowing more flexibility in nanowire devices design. Our results thus provide a theoretical foundation and understanding that a core-shell structure is far superior to the longitudinal p-i-n structure for electrical injection nanowire lasers.",
author = "D. Li and Cun-Zheng Ning",
year = "2008",
month = "12",
doi = "10.1021/nl801894z",
language = "English (US)",
volume = "8",
pages = "4234--4237",
journal = "Nano Letters",
issn = "1530-6984",
publisher = "American Chemical Society",
number = "12",

}

TY - JOUR

T1 - Electrical injection in longitudinal and coaxial heterostructure nanowires

T2 - A comparative study through a three-dimensional simulation

AU - Li, D.

AU - Ning, Cun-Zheng

PY - 2008/12

Y1 - 2008/12

N2 - We carried out a comparative study of electrical injection in longitudinal p-i-n and coaxial p-n core-shell nanowires by performing a three-dimensional numerical simulation. In the case of the core-shell structure, we show that both electrons and holes of high density can be efficiently injected into and confined in the structure even without an i-region. The required bias voltage and doping concentrations in the core-shell structure are smaller than those in the longitudinal p-i-n structure to achieve the same carrier injection level. Furthermore, we show that a type-I band alignment, as required in traditional p-i-n structure is not necessary in core-shell structure, allowing more flexibility in nanowire devices design. Our results thus provide a theoretical foundation and understanding that a core-shell structure is far superior to the longitudinal p-i-n structure for electrical injection nanowire lasers.

AB - We carried out a comparative study of electrical injection in longitudinal p-i-n and coaxial p-n core-shell nanowires by performing a three-dimensional numerical simulation. In the case of the core-shell structure, we show that both electrons and holes of high density can be efficiently injected into and confined in the structure even without an i-region. The required bias voltage and doping concentrations in the core-shell structure are smaller than those in the longitudinal p-i-n structure to achieve the same carrier injection level. Furthermore, we show that a type-I band alignment, as required in traditional p-i-n structure is not necessary in core-shell structure, allowing more flexibility in nanowire devices design. Our results thus provide a theoretical foundation and understanding that a core-shell structure is far superior to the longitudinal p-i-n structure for electrical injection nanowire lasers.

UR - http://www.scopus.com/inward/record.url?scp=61649090666&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=61649090666&partnerID=8YFLogxK

U2 - 10.1021/nl801894z

DO - 10.1021/nl801894z

M3 - Article

VL - 8

SP - 4234

EP - 4237

JO - Nano Letters

JF - Nano Letters

SN - 1530-6984

IS - 12

ER -