Strathprints Home | Open Access | Browse | Search | User area | Copyright | Help | Library Home | SUPrimo

Light-induced D-diffusion measurements in hydrogenated amorphous silicon: testing H-metastability models

Branz, H. M. and Asher, S. and Gleskova, Helena and Wagner, S. (1999) Light-induced D-diffusion measurements in hydrogenated amorphous silicon: testing H-metastability models. Physical Review B, 59 (8). pp. 5513-5520. ISSN 1098-0121

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

We measure light-induced D tracer diffusion in hydrogenated amorphous silicon samples under conditions at which thermal diffusion is negligible. Under high-intensity (9 W cm-2), red-light soaking at 135 °C, the D diffusion coefficient is DD=1.3×10-18cm2 s-1 and the rate of D emission from Si-D to transport is 3.5×10-5s-1. We also find an upper bound of DD=3×10-20cm2 s-1, the light-induced diffusion coefficient at 65 °C. Previous experiments had revealed only “light-enhanced” diffusion between from 200 to 300 °C, a regime in which thermal diffusion is also significant. Our 135 °C result extends the range of the 0.9-eV activation energy for this diffusion; our 65 °C upper bound is consistent with the extrapolation of the higher temperature data. We also measure metastable defect creation at 65 and 135 °C to test models of light-induced metastability that involve emission of H from Si-H bonds to an H transport level. This class of models can be limited, but not excluded, by our data. The H emission parameter of the H collision model of metastability is also estimated.

Item type: Article
ID code: 33410
Keywords: hydrogenated amorphous silicon , metastability models , metastability, Electrical engineering. Electronics Nuclear engineering
Subjects: Technology > Electrical engineering. Electronics Nuclear engineering
Department: Faculty of Engineering > Electronic and Electrical Engineering
Related URLs:
    Depositing user: Pure Administrator
    Date Deposited: 12 Oct 2011 15:40
    Last modified: 04 Oct 2012 13:52
    URI: http://strathprints.strath.ac.uk/id/eprint/33410

    Actions (login required)

    View Item