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Herein, we develop a novel all-in-one cathode-separator-anode monolith architecture designed for high-capacity, ultra-thin flexible batteries. This architecture involves directly casting electrode slurry onto both sides of a polypropylene (PP) separator. Controlled volatility and wettability of the solvent system are critical for the formation of neat electrode coating layers on the PP separator. The monolith structure offers remarkable flexibility and intimate contact between the electrode and separator, which is especially advantageous when stacked for higher areal capacity. The monoliths are conjoined into an all-in-one multi-layered monolith structure, deploying electrode slurry as an 'electrochemically active adhesive' between them, enabling the creation of high-capacity, ultra-thin flexible batteries. The resulting pouch cell exhibits a high capacity of 44.5 mA h (areal capacity of 4.9 mA h cm−2) at 1 mA and a thickness below 1 mm. Notably, this cell boasts superior rate capability even at this high capacity, showing a discharge capacity of 36.3 mA h at 20 mA. Practical application of this high-capacity, ultra-thin flexible battery is demonstrated in a band-type light-therapy patch, which shows operational stability when bent around a human arm. This development marks a significant advancement in the design of ultra-thin, high-capacity flexible batteries, with potential applications in flexible and wearable battery technologies. [ABSTRACT FROM AUTHOR]

Integrating organic light-emitting diodes (OLEDs) with light therapy can significantly advance biomedical applications by offering non-invasive, precise, and customizable treatments. Developing innovative device designs and performing cellular tests is essential to assess the safety and effect of OLED-based light therapies in dermatology. As such, a wearable OLED medical device prototype has been created for easy attachment to the body, ensuring consistent exposure to skin injuries due to its comfortable fit and user-friendly operation. Moreover, it has demonstrated effectiveness in enhancing wound healing, as indicated by a max 23% increase in fibroblast proliferation at the cellular level. [ABSTRACT FROM AUTHOR]

This study explores Thin Film Encapsulation, highlighting its impressive resistance to crack propagation achieved by intentionally introducing defects between two distinct inorganic materials. Through strategic interface defect engineering, we have successfully reinforced the encapsulation's robustness, contributing to its enhanced performance and durability. [ABSTRACT FROM AUTHOR]

A kerfed pillar platform is proposed for deformable double curvature displays, which is designed for a smooth transition between 2D and complex 3D shapes, like spheres and saddles, while maintaining structural integrity. The kerfs modify flexible substrate into the pillar‐island structure, which enhances substrate compressibility, preventing crumpling during 3D curve transformation. It exemplifies controlled deformation, adhering to the superposition principle, and enabling diverse display configurations. The proposed structure provides a new approach for next‐generation display applied for human‐machine interface and architectural design, advancing dynamic, free‐form displays. [ABSTRACT FROM AUTHOR]

We deposited micro‐scale organic light‐emitting diodes(OLEDs) with a red‐emitting material on an ultrathin organic film and demonstrated a flexible device with a cantilever form factor. This platform satisfied the necessary light irradiation conditions applicable for phototherapeutic applications and also holds potential for biomedical implantable areas such as neurotherapy. [ABSTRACT FROM AUTHOR]

This study introduces a simplified fabrication method for implementing a TFT array on a cylindrical fiber, using only four masks and a low‐temperature process below 120 ℃. To overcome the limitations of the one‐dimensional cylindrical fiber structure, the study emphasizes the design and implementation of a three‐dimensional backplane, utilizing the side or bottom surfaces of the fiber to address patterning and shadowing challenges. The proposed TFTs, part of the 2T1C pixel circuit within the fiber, exhibit electrical properties suitable for driving OLEDs. [ABSTRACT FROM AUTHOR]