CdTe microwire-based ultraviolet photodetectors aligned by a non-uniform electric field

Hyunik Park, Gwangseok Yang, Seungju Chun, Donghwan Kim, Ji Hyun Kim

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

We report on ultraviolet (UV) photodetectors fabricated by positioning Cadmium Telluride (CdTe) microwires (μWs) precisely by dielectrophoretic (DEP) force, where CdTe μWs were grown using an Au-catalyst-assisted closed-space-sublimation (CSS) method. The optical properties of CSS-grown CdTe μWs were characterized by micro-photoluminescence and micro-Raman spectroscopies. Optoelectronic characteristics were obtained after CdTe μWs were aligned on a pre-patterned SiO2/Si substrate by a non-uniform electric field. Photocurrents were increased with increasing the light intensities. Fast and reliable photoresponse and recovery were observed when CdTe μWs were exposed to UV illuminations. We demonstrated that high quality CdTe μWs grown by the CSS method have significant potentials as optoelectronic devices.

Original languageEnglish
Article number051906
JournalApplied Physics Letters
Volume103
Issue number5
DOIs
Publication statusPublished - 2013 Jul 29

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cadmium tellurides
photometers
electric fields
sublimation
optoelectronic devices
luminous intensity
positioning
photocurrents
Raman spectroscopy
recovery
illumination
photoluminescence
optical properties
catalysts

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

CdTe microwire-based ultraviolet photodetectors aligned by a non-uniform electric field. / Park, Hyunik; Yang, Gwangseok; Chun, Seungju; Kim, Donghwan; Kim, Ji Hyun.

In: Applied Physics Letters, Vol. 103, No. 5, 051906, 29.07.2013.

Research output: Contribution to journalArticle

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