Abstract

Semiconductor alloy nanowires with spatially graded compositions (and bandgaps) provide a new material platform for many new multifunctional optoelectronic devices, such as broadly tunable lasers, multispectral photodetectors, broad-band light emitting diodes (LEDs) and high-efficiency solar cells. In this review, we will summarize the recent progress on composition graded semiconductor alloy nanowires with bandgaps graded in a wide range. Depending on different growth methods and material systems, two typical nanowire composition grading approaches will be presented in detail, including composition graded alloy nanowires along a single substrate and those along single nanowires. Furthermore, selected examples of applications of these composition graded semiconductor nanowires will be presented and discussed, including tunable nanolasers, multi-terminal on-nanowire photodetectors, full-spectrum solar cells, and white-light LEDs. Finally, we will make some concluding remarks with future perspectives including opportunities and challenges in this research area. Semiconductor alloy nanowires with spatially graded compositions (and bandgaps) provide a new material platform for many new multifunctional optoelectronic devices, such as broadly tunable lasers, multispectral photodetectors, broad-band light emitting diodes (LEDs) and high-efficiency solar cells. Here, recent studies on composition or bandgap-graded semiconductor alloy nanowires based on a single substrate or along single nanowires are reviewed.

Original languageEnglish (US)
Pages (from-to)13-33
Number of pages21
JournalAdvanced Materials
Volume24
Issue number1
DOIs
StatePublished - Jan 3 2012

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Nanowires
Energy gap
Semiconductor materials
Chemical analysis
Photodetectors
Light emitting diodes
Solar cells
Laser tuning
Optoelectronic devices
Substrates

Keywords

  • graded bandgap
  • nanowire
  • semiconductor alloy

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Composition and bandgap-graded semiconductor alloy nanowires. / Zhuang, Xiujuan; Ning, Cun-Zheng; Pan, Anlian.

In: Advanced Materials, Vol. 24, No. 1, 03.01.2012, p. 13-33.

Research output: Contribution to journalArticle

Zhuang, Xiujuan ; Ning, Cun-Zheng ; Pan, Anlian. / Composition and bandgap-graded semiconductor alloy nanowires. In: Advanced Materials. 2012 ; Vol. 24, No. 1. pp. 13-33.
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