Micropatterning PEDOT:PSS layers

Photopatternable PEDOT:PSS/PEG hybrid thin film with moisture stability and sensitivity

“…In the proposed photolithographic patterning of the PEDOT:PSS/PEG hybrid film, the one-step procedure is similar to traditional photolithography of negative photoresists, in which PEG behaves as a direct photosensitive matrix. This procedure has several advantages compared with the existing PEDOT:PSS patterning approaches, including a simple processing procedure, high resolution, and scalability to a large surface area 39 . It is worth noting that neither a protection layer nor a developer solution is needed in photopatterning, as the uncrosslinked PEGDA residues can be washed off by DI water, avoiding potential chemical damage to the sensitive PEDOT:PSS film.…”

“…It is expected that, with increments of diffusion time, PEGDA can further penetrate into the PEDOT:PSS structure. Subsequently, a thicker layer of PEDOT:PSS can be transferred onto the crosslinked PEG substrate, and, therefore, an increased electrical conductivity, which is supposedly proportional to the thickness of the PEDOT:PSS layer 39 , is expected to be measured from the hybrid PEDOT:PSS/PEG film. As previous publications stated [40][41][42] , the hybrid structure only polymerizes under UV exposure when the diffusion of PEGDA penetrates into the PEDOT:PSS layers.…”

Effect of intrachain sulfonic acid dopants on the solid-state charge mobility of a model radical polymer

“…And, although radical polymers lack the molecular properties (e.g., a conjugated backbone and semicrystalline regions in the thin film state) that are highly preferred for high charge transport in conjugated polymers, the redox charge transport mechanism allows PTMA to possess solid-state electrical transport properties that are comparable to common, pristine (i.e., not doped) conjugated polymers [e.g., poly(3-hexylthiophene) and poly(2-methoxy-5-(2-ethylhexyloxyl)-1,4-phenylenevinylene)] [27,28]. One strategy utilized frequently in the conjugated polymer regime to increase the charge transport ability of the materials is the introduction of small molecule and macromolecular dopants to optoelectronicallyactive materials [e.g., the addition of poly(styrene sulfonate) to poly(3,4-ethylene dioxythiophene) (PEDOT:PSS) produces a material with a high electrical conductivity] [29][30][31][32][33][34]. Here, we extend this paradigm to the realm of radical polymers through the intentional addition of ion-bearing repeat units to the macromolecular architecture of PTMA; these ion-bearing repeat units serve as intramolecular dopants in order to enhance the transport ability of the copolymers relative to pristine PTMA.…”

Conformal single-layer encapsulation of PEDOT at low substrate temperature

“…[13] At elevated temperature, thermal shrinkage of the conducting area can also cause conductivity loss of PEDOT. [9] Last but not least, scientists found sizes of dopant molecules in PEDOT films have a large impact on its conductivity loss, which suggests that a loss of dopants is also a mechanism of Previous achievements on the encapsulation of PEDOT and its copolymers include parylene [16,17], silicon nitride [4], and et al. These materials have been proved to provide excellent barrier to water vapor and oxygen.…”

“…[1][2][3][4][5][6] They are attractive due to their easy processing, flexibility, low cost and high porosity, which is important for many commercial applications. Among all organic conducting materials, PEDOT has shown a great promise as a result of its high conductivities (>1000 S cm -1 ).…”