Abstract
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 language | English |
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Pages (from-to) | 263-266 |
Number of pages | 4 |
Journal | Journal of Non-Crystalline Solids |
Volume | 200 |
DOIs | |
Publication status | Published - 1996 |