THE EFFECT OF Ge CONTENT ON THE OPTICAL AND ELECTRICAL PROPERTIES OF a-SiGe:H THIN FILMS

THE EFFECT OF Ge CONTENT ON THE OPTICAL AND ELECTRICAL PROPERTIES OF a-SiGe:H THIN FILMS

The effect of Ge content on the optical and electrical properties of Si-Ge-H thin films deposited by HWCPECVDhad been investigated. The Si- Ge-H films ware grown on corning glass 7059 substrate using 10% dilutedGeH4 and SiH4 gas mixture, respectively. The GeH4 gas flow rate was varied from 2.5 to 12.5 sccm, while the flowrate of SiH was kept constant at 70 sccm. The results showed that the deposition rate of Si-Ge-H thin films wasincreases with the increasing of GeH4 gas flow rate. Beside, the Ge content in the film also increased, and the opticalband gap decreased. The dark conductivity of Si- Ge-H films was relatively constant, whereas the photo ’sconductivity decreased with increasing of Ge content.

Mursal, Mursal; Department of Physics, Faculty of Science, Syiah Kuala University

Irhamni, Irhamni; Department of Physics, Faculty of Science, Syiah Kuala University

Winata, Toto; Department of Physics, Bandung Institute of Technology

Jurnal Natural; Volume 13, Number 2, Year 2013

Jurnal Natural

2014-04-08

http://jurnal.unsyiah.ac.id/natural/article/view/1171/1091

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Peer-reviewed Article

http://jurnal.unsyiah.ac.id/natural/article/view/1171