Simulation of temperature dependent characterization of charge transport in organic transistor

In this paper, we present a simulation work in organic transistors using technology computer-aided design (TCAD) Sentaurus tool. A pentacene as an active semiconductor layer is used to simulate and design a top contact structure of p-channel organic transistor. The electrical characterization on these devices was investigated at temperature (T) ranging from 70 to 300 K to estimate the effects of Meyer-Neldel rule (MNR) for charge transport mobility (μ
_MN
). In the linear region of output characteristics for T = 70, 100, 140, 180, 220, 260 and 300 K, simulation showed maximum drain current (I
_ds
) for temperature of 70 K is 0.394 μA and for 300 K is 3.54 μA. The transfer characteristics exhibit threshold voltage values ranging from 18.3 to 24.6 V at 70 K to 300 K range, using IEEE1620 Standard. Then, the MNR model reveals low E
_a
has high μ
_mn
of 0.0093 cm
²
V
¹
s
^-1
at T
_MN
= 208 K, while higher E
_a
values of 63.8 meV has lower μ
_MN
= 0.0034 cm
²
V
¹
s
^-1
, which shows an inverse relationship between E
_a
and μ
_MN
.