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. 2021 Sep 8;7(37):eabh1055. doi: 10.1126/sciadv.abh1055

Fig. 4. Laser-cut and self-aligned cofacial complementary inverter pair.

Fig. 4.

(A) The cross-sectional schematic of a laser cut cofacial pair. The stack has an added hydrophobic coating to aid in the selective deposition of p(C4-T2-C0-EG) in the laser-cut trench. (B) Optical micrograph of the self-aligned laser-cut cofacial pair. The dashed red outline denotes the shorted bottom contacts of the vOECTs where Vout of the inverter is recorded. The dashed purple box outlines the top contacts of the vOECTs of the inverter that are connected to VDD and ground. Scale bar, 200 μm. (C) A tilted SEM micrograph of the cross section of the cofacial pair of OECTs. FIB milling was used to expose the cross section, requiring deposition of a thick Pt layer. Scale bar, 5 μm. (D) The VTCs of the cofacial pair inverter (ΔVin = 0.01 V, 0 to 0.6 V, and VDD = 0.8 V) and the corresponding gain (δVout/δVin) with a peak gain of about 12.