Enhanced Charge Injection in Pentacene Field‐Effect Transistors with Graphene Electrodes

Abstract

Pentacene organic field‐effect transistors with multilayer graphene electrodes exhibit a lower contact resistance and lower charge‐injection barrier height than those with conventional Au electrodes. This enhancement in performance is related to the favorable dipole layer formation at the graphene/pentacene interface.

A simple PAN-based fabrication method for microstructured carbon electrodes for organic field-effect transistors

“…Therefore, P(NDI2OD-T2) OFETs with Au electrodes exhibited a high electron l FET of 0.180 cm 2 V À1 s À1 although the LUMO level of P(NDI2OD-T2) was $4.0 eV. However, the graphene-organic semiconductor interface generally forms a relatively-weak interface dipole layer, unlike the Au-organic semiconductor interface [44]. Therefore, the CGM work function at the interface could be much higher than that of the Au electrode, which is favorable for hole injection to the HOMO level ($5.2 eV) of P3HT and slightly unfavorable for electron injection to the LUMO level ($4.0 eV) of P(NDI2OD-T2), compared to those of the Au electrode device.…”

Inking Elastomeric Stamps with Micro‐Patterned, Single Layer Graphene to Create High‐Performance OFETs

“…[ 3 , 12 ] Several reports have demonstrated organic thin fi lm transistors (OTFT) using CVD-grown graphene as source and drain electrodes. [13][14][15][16][17][18] However, in these studies, fabricating reliable junctions while maintaining clean interface between the channel and electrodes remains as a challenge. Although photolithography with subsequent dry and wet etching processes have been shown to work with graphene, these processes are not compatible with organic devices due to the harsh patterning conditions.…”

Discontinuity and misorientation of graphene grown on nickel foil: Effect of the substrate crystallographic orientation

“…exposure [4,5]. FLG and MLG exhibited good performance as transparent conductive electrodes [6][7][8][9][10][11], corrosion protection coatings [12,13], and lubricants [14] as well as in sensing applications [15][16][17][18][19][20][21][22] and spintronics [23][24][25]. For applications where the number of layers is not critical, thicker graphene may offer higher durability and is less affected by the substrate.…”