Sublinear photoconductivity in n-type a-Si:H: analysis and computer modelling

C. Main, F. Dick, S. Reynolds, W. Gao, R. A. G. Gibson

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    11 Citations (Scopus)


    In this paper an approach is suggested to examine photoconductivity in n-type a-Si:H, in which band tails are required to play an important role as reservoirs of trapped charge but do not provide a significant recombination path. The model arises from observations of steady state photoconductivity in n-type a-Si:H which reveal sublinear behaviour of photocurrent dI extending several orders of magnitude below the ‘dark’ current IO. This is unexpected behaviour, since most models predict linearity for small-signal conditions. Computer simulations using the suggested model reproduce this behaviour and also fit the observed temperature dependence of the index, ?.

    Original languageEnglish
    Pages (from-to)263-266
    Number of pages4
    JournalJournal of Non-Crystalline Solids
    Publication statusPublished - 1996


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