A simple lamination process of the top electrode for perovskite solar cells is demonstrated. The laminate electrode consists of a transparent and conductive plastic/metal mesh substrate, coated with an adhesive mixture of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate), PEDOT:PSS, and sorbitol. The laminate electrode showed a high degree of transparency of 85%. Best cell performance was achieved for laminate electrodes prepared with a sorbitol concentration of ~30 wt% per milliliter PEDOT:PSS dispersion, and using a pre-annealing temperature of 120°C for 10 min before lamination. Thereby, perovskite solar cells with stabilized power conversion efficiencies of (7.6 ± 1.0)% were obtained which corresponds to 80% of the reference devices with reflective opaque gold electrodes.

This paper presents an organic sensor for ambient light monitoring fabricated on flexible plastic foil. The sensor exploits an organic photodiode whose photocurrent is linearly converted into an output voltage by a transconductance operational amplifier in a feedback configuration. The photodiode is based on an inkjet printed bulk heterojunction blend of P3HT/PCBM sandwiched between Au and Al electrodes, whereas the amplifier is implemented in a printed complementary organic TFT technology. Both the photodiode and the amplifier were fully characterized in stand-alone configuration. Then, the response of the assembled sensor was measured by using a commercial 12-V halogen lamp as light source. Experimental data demonstrated that the sensor is able to provide a linear detection of the incident light intensity up to 11000 lux.

Bioelectronic and neuroprosthetic interfaces rely on implanted microelectrode arrays (MEAs) to interact with the human body. Printing techniques, such as inkjet and screen printing, are attractive methods for the manufacturing of MEAs because they allow flexible, room‐temperature, scalable, and cost‐effective fabrication processes. Herein, the fabrication of all‐printed electrocorticography arrays made by inkjet printing of platinum and screen printing of polyimide is shown. Next, mechanical and electrochemical characterizations are performed. As a proof of concept, in vivo visually evoked cortical potentials are recorded in rabbits upon flash stimulation. Lastly, it is shown that the all‐printed electrocorticography arrays are not cytotoxic. Altogether, the results enable the use of printed MEAs for neurological applications.

The natural, non-toxic antifouling compound zosteric acid (ZA, p-coumaric acid sulfate) was encapsulated in polystyrene (PS) microcapsules (30 mg ZAil g PS) with an efficiency of 30 % via an in-liquid drying process. Electron micrographs showed microcapsules with smooth surfaces and a mean diameter of 200 µm. The FIB method was used to cross-section a microcapsule in order to visualize the inner capsule structure and to localize ZA via element analysis. Coatings of a biocompatible polyester, poly[3-hydroxyalkanoate-co-3-hydroxyalkenoate] (PHAE), were prepared on microscopic slides. These coatings contained dispersed ZA (PHAE/ZA) or ZAloaded PS microcapsules (PHAE/PS(ZA)). The release of ZA was monitored vi'a conductivy measurements in water and was 4 µgcm-2 d-1 for PHAE/ZA and 0.9 µgcm-2 d-1 for PHAE/PS(ZA) coatings. To follow the initial steps ofbiofilm formation, coated slides were exposed to activated sludge arid analyzed for cell adhesion with ESEM. ZA was effective during the burst release time of the PHAE/ZA coating, but no significant differences in biofouling were observed after 48 h. This was attributed to the minimal effective release rate of ZA, which is approximately IO µgcm• 2 d-1 •

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