Red to green rainbow photoluminescence from unoxidized silicon nanocrystallites

Zain Yamani, Sahel Ashhab, Amman Nayfeh, W. Howard Thompson, Munir Nayfeh

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

We prepared luminescent silicon by incorporating H 2O 2 in the anodizing process. Under UV excitation, our samples appear reddish, orangish, yellowish to greenish as the electrolyte-air interface at the meniscus is approached. Under high current anodization, the emission becomes broad but unstable. The time characteristics of all the emission regions are in the range of 1-10 μs. The results are consistent with a significant reduction of crystallite sizes, and may be explained via novel Si - Si dimer surface states that are induced by quantum confinement.

Original languageEnglish
Pages (from-to)3929-3931
Number of pages3
JournalJournal of Applied Physics
Volume83
Issue number7
Publication statusPublished - 1 Dec 1998
Externally publishedYes

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rainbows
photoluminescence
anodizing
menisci
silicon
high current
dimers
electrolytes
air
excitation

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Yamani, Z., Ashhab, S., Nayfeh, A., Thompson, W. H., & Nayfeh, M. (1998). Red to green rainbow photoluminescence from unoxidized silicon nanocrystallites. Journal of Applied Physics, 83(7), 3929-3931.

Red to green rainbow photoluminescence from unoxidized silicon nanocrystallites. / Yamani, Zain; Ashhab, Sahel; Nayfeh, Amman; Thompson, W. Howard; Nayfeh, Munir.

In: Journal of Applied Physics, Vol. 83, No. 7, 01.12.1998, p. 3929-3931.

Research output: Contribution to journalArticle

Yamani, Z, Ashhab, S, Nayfeh, A, Thompson, WH & Nayfeh, M 1998, 'Red to green rainbow photoluminescence from unoxidized silicon nanocrystallites', Journal of Applied Physics, vol. 83, no. 7, pp. 3929-3931.
Yamani, Zain ; Ashhab, Sahel ; Nayfeh, Amman ; Thompson, W. Howard ; Nayfeh, Munir. / Red to green rainbow photoluminescence from unoxidized silicon nanocrystallites. In: Journal of Applied Physics. 1998 ; Vol. 83, No. 7. pp. 3929-3931.
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