Electrical properties of photo-CVD boron-doped hydrogenated nanocrystalline silicon-carbide (p-nc-SiC:H) films for uncooled IR bolometer applications

Hyung Kew Lee, Seung Yeop Myong, Koeng Su Lim, Euisik Yoon

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Electrical properties of boron-doped nanocrystalline silicon-carbide (p-nc-SiC:H) films grown by mercury-sensitized photo-chemical vapor deposition method have been investigated for uncooled IR bolometer applications. The temperature coefficient of resistance (TCR), conductivity, and 1/f noise characteristics have been measured and the detectivity of a bolometer has been estimated from them. It has been observed that as ethylene gas flow ratio (C2H4/SiH4) increases, TCR of films increases due to larger optical bandgap. However, the 1/f noise also increases due to the reduction of the number of total carriers in the films for higher activation energy (Ea). The maximum TCR of 2.3%/K has been measured for the films deposited with an ethylene gas flow ratio of 0.47, while the maximum detectivity has been estimated for those with an ethylene gas flow ratio of 0.07 because of the lowest 1/f noise.

Original languageEnglish
Pages (from-to)297-301
Number of pages5
JournalJournal of Non-Crystalline Solids
Volume316
Issue number2-3
DOIs
Publication statusPublished - 2003 Feb 1

Fingerprint

Nanocrystalline silicon
Bolometers
Boron
bolometers
Silicon carbide
silicon carbides
Chemical vapor deposition
boron
Electric properties
electrical properties
vapor deposition
gas flow
Flow of gases
Ethylene
ethylene
coefficients
Optical band gaps
Mercury
Temperature
temperature

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

Cite this

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title = "Electrical properties of photo-CVD boron-doped hydrogenated nanocrystalline silicon-carbide (p-nc-SiC:H) films for uncooled IR bolometer applications",
abstract = "Electrical properties of boron-doped nanocrystalline silicon-carbide (p-nc-SiC:H) films grown by mercury-sensitized photo-chemical vapor deposition method have been investigated for uncooled IR bolometer applications. The temperature coefficient of resistance (TCR), conductivity, and 1/f noise characteristics have been measured and the detectivity of a bolometer has been estimated from them. It has been observed that as ethylene gas flow ratio (C2H4/SiH4) increases, TCR of films increases due to larger optical bandgap. However, the 1/f noise also increases due to the reduction of the number of total carriers in the films for higher activation energy (Ea). The maximum TCR of 2.3{\%}/K has been measured for the films deposited with an ethylene gas flow ratio of 0.47, while the maximum detectivity has been estimated for those with an ethylene gas flow ratio of 0.07 because of the lowest 1/f noise.",
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Electrical properties of photo-CVD boron-doped hydrogenated nanocrystalline silicon-carbide (p-nc-SiC:H) films for uncooled IR bolometer applications. / Lee, Hyung Kew; Myong, Seung Yeop; Lim, Koeng Su; Yoon, Euisik.

In: Journal of Non-Crystalline Solids, Vol. 316, No. 2-3, 01.02.2003, p. 297-301.

Research output: Contribution to journalArticle

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AB - Electrical properties of boron-doped nanocrystalline silicon-carbide (p-nc-SiC:H) films grown by mercury-sensitized photo-chemical vapor deposition method have been investigated for uncooled IR bolometer applications. The temperature coefficient of resistance (TCR), conductivity, and 1/f noise characteristics have been measured and the detectivity of a bolometer has been estimated from them. It has been observed that as ethylene gas flow ratio (C2H4/SiH4) increases, TCR of films increases due to larger optical bandgap. However, the 1/f noise also increases due to the reduction of the number of total carriers in the films for higher activation energy (Ea). The maximum TCR of 2.3%/K has been measured for the films deposited with an ethylene gas flow ratio of 0.47, while the maximum detectivity has been estimated for those with an ethylene gas flow ratio of 0.07 because of the lowest 1/f noise.

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