S. Nishida et al., SIMULATIONS ON BACK GATE EFFECTS OF A-SI TFT OFF CURRENT UNDER ILLUMINATION, Journal of non-crystalline solids, 166, 1993, pp. 755-758
We have analyzed numerically back gate effects of a-Si TFT under illum
ination with a 2-dimensional device simulator. In this simulator, all
localized states were taken into account as recombination centers and
as charge trapping centers by Shockley-Read-Hall statistics according
to the Simmons-Taylor's analysis. The simulation results explain well
the enhancement of the TFT OFF current under illumination and the shou
lder-like increase of the dark OFF current which were generally observ
ed experimentally.