Transient Trap-Limited Field Dependence charge carrier transport in organic semiconductors for time of flight configuration
محورهای موضوعی : فصلنامه نانوساختارهای اپتوالکترونیکی
1 - Department of Basic Science, Farhangian University, Tehran. Iran
کلید واژه: organic semiconductors, charge transport, mobility, time of flight,
چکیده مقاله :
Organic semiconducting polymers are for use in
low cost electronics and photovoltaic application has
technological and scientific interest in organic materials. In
this paper we use the time of flight of a charge packet
injected by a voltage pulse to calculate the drift velocity
and mobility of holes. This technique is based on the
application of a voltage applied at the anode and
calculating the delay time in the appearance of the injected
carriers at the other contact. This method is a simple way
to determine the charge transport properties of the organic
semiconductors .The effect of charge trapping mechanism
on the carrier mobility in the organic layers are investigated
and we discussed the theory of a electronic method to
obtain the drift mobility of holes in an organic layer.
Finally time of flight calculations were done on organic
layers and it was observed that the mobility reduces at low
electric field.
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