9-13 July 2012
Africa/Johannesburg timezone
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Structural, Electrical and Electronic Properties of carbon and carbon-based materials

Presented by Mr. Wilfred MBIOMBI on 10 Jul 2012 from 17:30 to 19:30
Type: Poster Presentation
Session: Poster Session
Track: Track A - Division for Condensed Matter Physics and Materials

Abstract

Wilfred Mbiombi, Zivayi Chiguvare, Daniel Wamwangi and Sekhar C. Ray* School of Physics, DST/NRF Centre of Excellence in Strong Materials and Materials Physics Research Institute (MPRI); University of the Witwatersrand, Pvt. Bag 3, WITS 2050, Johannesburg, South Africa In this work, we have studied the structural, electronic and electrical properties of diamond like carbon (DLC: a-C:H), silicon doped-DLC (a-C:H:Si) and nitrogen-doped amorphous carbon (a-CNx) thin films grown by plasma enhanced chemical vapour deposition (PECVD) process. Un-doped DLC films were prepared at different applied bias voltage (Vb ) starting from 100 V to 600 V, whereas the silicon is doped using tetramethysilane (TMS) as a precursor at different SSCM and N is doped a-CNx films were prepared at different at% N using nitrogen precursors. The thicknesses of all thin films are ~150 nm. Micro-structure and electronic properties were studied using Raman spectroscopy; whereas electrical properties were studied using voltage (V) vs current (I) measurements. It is found that the electrical conductivity is strongly responsible to the presence of sp2-hybridized carbon atoms in the thin films structure. We have obtained the (ID/IG) ratio of all thin films from Raman spectra and are correlated with the electrical conductivity. * Corresponding Author: Sekhar.Ray@wits.ac.za (Sekhar C. Ray), Ph: +27-011-7176806

Award

No

Level

N/A

Supervisor

Sekhar C. Ray, Sekhar.Ray@wits.ac.za

Paper

No

Place

Location: IT Building
Room:


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