Enhanced photocurrent from CdS sensitized ZnO nanorods

Jhasaketan Nayak, Min Kyu Son, Jin Kyoung Kim, Soo Kyoung Kim, Jeong Hoon Lee, Hee Je Kim

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Structure and optical properties of cadmium sulphide-zinc oxide composite nanorods have been evaluated by suitable characterization techniques. The X-ray diffraction spectrum contains a series of peaks corresponding to reflections from various sets of lattice planes of hexagonal ZnO as well as CdS. The above observation is supported by the Micro-Raman spectroscopy result. The optical reflectance spectra of CdS-ZnO is compared with that of ZnO where we observe an enhanced absorption and hence diminished reflection from CdS-ZnO compared to that from only ZnO. A very small intensity of the visible photoluminescence peak observed at 550 nm proves that the ZnO nanorods have very low concentrations of point defects such as oxygen vacancies and zinc interstitials. The photocurrent in the visible region has been significantly enhanced due to deposition of CdS on the surface of the ZnO nanorods. CdS acts as a visible sensitizer because of its lower band gap compared to ZnO.

Original languageEnglish
Pages (from-to)965-970
Number of pages6
JournalJournal of Electrical Engineering and Technology
Volume7
Issue number6
DOIs
Publication statusPublished - Nov 1 2012

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Nanorods
Photocurrents
Cadmium sulfide
Point defects
Oxygen vacancies
Zinc oxide
Raman spectroscopy
Photoluminescence
Energy gap
Zinc
Optical properties
X ray diffraction
Composite materials

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Cite this

Enhanced photocurrent from CdS sensitized ZnO nanorods. / Nayak, Jhasaketan; Son, Min Kyu; Kim, Jin Kyoung; Kim, Soo Kyoung; Lee, Jeong Hoon; Kim, Hee Je.

In: Journal of Electrical Engineering and Technology, Vol. 7, No. 6, 01.11.2012, p. 965-970.

Research output: Contribution to journalArticle

Nayak, Jhasaketan ; Son, Min Kyu ; Kim, Jin Kyoung ; Kim, Soo Kyoung ; Lee, Jeong Hoon ; Kim, Hee Je. / Enhanced photocurrent from CdS sensitized ZnO nanorods. In: Journal of Electrical Engineering and Technology. 2012 ; Vol. 7, No. 6. pp. 965-970.
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