Revealing the interlayer orientations for bilayer graphene grown on hexagonal boron nitride by c-AFM measurement

Conductive PEDOT-Dominant Surface of Transparent Electrode Patch via Selective Phase Transfer for Efficient Flexible Photoelectronic Devices

“…The highest responsivity and detectivity were confirmed at the 830 nm point, and the responsivity of the transferred PEDOT:PSS patch device is 0.55 A W –1 (0.53 A W –1 in the spin-coated condition) and the detectivity is 5.12 × 10 12 Jones (2.56 × 10 12 Jones in the spin-coated condition) (Figure e,f, and Table ). These efficient dark current suppression outcomes were due to the reduction of charge carrier recombination and trap-assisted recombination achieved by the stabilized surface of the transferred PEDOT:PSS patch and tuned energy level. ,− …”

“…Figure c,d shows the conductive AFM (C-AFM) images of the spin-coated PEDOT:PSS electrode and transferred PEDOT:PSS patch. C-AFM is a measurement method that can confirm the conductivity of the surface by detecting the higher current value flowing between the cantilever and the sample at a constant cantilever voltage . The C-AFM image of the transferred PEDOT:PSS patch is a green-dominant image (with current intensities ranging from 100 to 200 nA), while the spin-coated PEDOT:PSS electrode image yields a blue-dominant image (with current intensities ranging from 0 to 100 nA) because the conductive phase of the PEDOT dominant domain was come up through phase switching in the transferred PEDOT:PSS patch.…”

“…C-AFM is a measurement method that can confirm the conductivity of the surface by detecting the higher current value flowing between the cantilever and the sample at a constant cantilever voltage. 61 The electrode and transferred PEDOT:PSS electrode patch, Figure S5) In the AFM phase images of PEDOT:PSS films, the high degree phase refers to cross-linked PEDOT, and the low degree phase indicates PSS. The transferred electrode patch shows that the high-degree phase was widely distributed owing to phase inversion, which indicates the cross-linked PEDOT phase was placed on the surface compared to the spin-coated electrode.…”