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Optical Materials Express

Optical Materials Express

  • Editor: David J. Hagan
  • Vol. 2, Iss. 6 — Jun. 1, 2012
  • pp: 839–848

Carbon nanotube arrays based high-performance infrared photodetector [Invited]

Qingsheng Zeng, Sheng Wang, Leijing Yang, Zhenxing Wang, Tian Pei, Zhiyong Zhang, Lian-Mao Peng, Weiwei Zhou, Jie Liu, Weiya Zhou, and Sishen Xie  »View Author Affiliations

Optical Materials Express, Vol. 2, Issue 6, pp. 839-848 (2012)

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The carbon nanotubes (CNTs) are an ideal material for infrared applications due to its excellent electronic and optoelectronic properties, suitable bandgap, mechanical and chemical stabilities. In this paper, we demonstrate a photovoltaic infrared detector which is based on aligned single-walled CNT (SWCNT) arrays. The device is fabricated by asymmetrically contacting the two ends of the SWCNT arrays with Pd and Sc of different work functions, which are known to form ohmic contacts with the valence and conduction bands of semiconducting SWCNTs respectively. The device is characterized at room temperature, exhibiting excellent diode characteristics, high responsivity of 9.87 × 10−5 A/W and infrared spectral detectivity of 1.09 × 107 cmHz1/2/W. The demonstration of the SWCNT arrays based infrared detector which is fabricated using a doping-free process paves the way to applications of CNT in such field as high-performance infrared sensors.

© 2012 OSA

OCIS Codes
(040.3060) Detectors : Infrared
(040.5160) Detectors : Photodetectors
(040.5350) Detectors : Photovoltaic
(230.5170) Optical devices : Photodiodes
(160.4236) Materials : Nanomaterials

ToC Category:
Detector Materials

Original Manuscript: March 23, 2012
Revised Manuscript: April 20, 2012
Manuscript Accepted: April 24, 2012
Published: May 23, 2012

Virtual Issues
Nanocarbon for Photonics and Optoelectronics (2012) Optical Materials Express

Qingsheng Zeng, Sheng Wang, Leijing Yang, Zhenxing Wang, Tian Pei, Zhiyong Zhang, Lian-Mao Peng, Weiwei Zhou, Jie Liu, Weiya Zhou, and Sishen Xie, "Carbon nanotube arrays based high-performance infrared photodetector [Invited]," Opt. Mater. Express 2, 839-848 (2012)

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