Low temperature growth and dimension- dependent photoluminescence efficiency of semiconductor nanowires

Yung-Jung Hsu, S. Y. Lu*

*Corresponding author for this work

Research output: Contribution to journalArticle

13 Scopus citations

Abstract

Low temperature growth and dimension dependent photoluminescence (PL) efficiency of semiconductor nanowires were investigated with CdS as a model system. The CdS nanowires were prepared with a simple, low temperature metal-organic chemical vapor deposition (MOCVD) process via the vapor-liquid-solid (VLS) mechanism. The low growth temperature of 360 °C was made possible with a newly developed single-source precursor of CdS and by using sputtered Au as the catalyst for the VLS growth. The length and diameter of the nanowires were adjusted by reaction time and sputtering conditions of Au, respectively. Nanowires of up to several μm in length and 20 to 200 nm in diameter were obtained. The PL quantum yield of the nanowires was found to decrease with increasing wire length, but to increase with decreasing wire diameter. This dimension-dependent PL efficiency of one-dimensional nanostructure, unlikely resulting from the quantum size confinement effect, appears to be a new observation that carries application significance.

Original languageEnglish
Pages (from-to)573-578
Number of pages6
JournalApplied Physics A: Materials Science and Processing
Volume81
Issue number3
DOIs
StatePublished - 1 Aug 2005

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