Complementary transfer-assisted patterning of high-resolution heterogeneous elements on plastic substrates for flexible electronics

Electronic Muscles and Skins: A Review of Soft Sensors and Actuators

“…In contrast to semiconductors, a wider range of compliant dielectrics exist due to the natural tendency of several polymers to have some degree of insulating properties. Poly­(vinyl cinnamate) (PVCi) is one such dielectric commonly used in organic TFTs (OTFTs). − Jang et al demonstrated the use of PVCi in a flexible organic TFT by dip coating a substrate in a solution of PVCi in chloroform, followed by photocuring the polymer at 255 nm through the chemical reaction illustrated in Figure . , When a metal insulator metal (MIM) capacitor was fabricated, the capacitance of the resulting structure was calculated to be ∼6 nF/cm 2 when the dielectric layer was 500 nm thick . In another study, Jang et al showed the lack of hydroxyl groups in the cross-linked polymer resulted in hysteresis free OTFTs when PVCi was used as the gate dielectric .…”

Array of solid-state dye-sensitized solar cells with micropatterned TiO2 nanoparticles for a high-voltage power source

“…Each isolated TNP pattern, which is 500 μm wide and 14 mm long in the interval of 500 μm, represents an individual photoanode for a unit cell in the SS-DSSC array [14,15]. Figure  2c shows the FE-SEM image of the cross-sectional TNP pattern.…”

“…The optical microscopic image of the TNP patterns in the FTO regions on the substrate is shown in Figure 2 b where TNP patterns isolated from the neighboring patterns were clearly seen. Each isolated TNP pattern, which is 500 μm wide and 14 mm long in the interval of 500 μm, represents an individual photoanode for a unit cell in the SS-DSSC array [ 14 , 15 ]. Figure 2 c shows the FE-SEM image of the cross-sectional TNP pattern.…”

“…Figure 1 a shows the transfer printing process of the complementary patterns of the SL on the PDMS stamp onto the FTO glass. Note that no additional pressure or heat is required during transfer printing due to the lower surface energy of the PDMS stamp than that of the FTO glass [ 14 ]. Ti-Nanoxide T (Solaronix SA, Aubonne, VD, Switzerland) paste was subsequently prepared on the SL-patterned FTO glass to form a TNP layer using a doctor-blading technique, as shown in Figure 1 b.…”

“…Figure 1 c illustrates the SL layer which was lifted-off in a fluorous solvent, leaving only the line patterns of the TNP layer on the FTO active regions. Note that the fluorous solvent is chemically inert to most organic and inorganic materials [ 14 , 15 ]. The patterned TNP layer was annealed at 80°C for 2 h and then at 450°C for 30 min.…”