Thin-film innovation promises tougher electronic devices

A research team has developed a next-generation thin-film material technology that significantly improves the durability of energy and electronic devices. This technology, which combines organic and inorganic materials in a dual-layer structure, can be applied to film-based solar cells and sensors. It is particularly notable for its ability to minimize the physical stress caused by rolling or unrolling, thereby greatly enhancing mechanical durability.

The work is published in the Chemical Engineering Journal.

Conventional energy and electronic devices often suffer defects during roll-to-roll production processes or in rollable usage environments. These issues are especially prevalent in thin-film materials with layered heterogeneous materials, where delamination (interlayer separation) occurs easily. To overcome these challenges, the research team developed a novel interfacial thin-film material and successfully resolved mechanical durability issues that previously caused defects during production.

The team created an innovative thin-film material by dual-coating mechanically flexible organic materials and mechanically robust inorganic materials. This material allows flexible devices to withstand physical and chemical stresses encountered in various environments.

When used as an interfacial layer between transparent electrodes and active layers in applications like solar cells and displays, the material improves bonding properties between electrodes and active layers while simultaneously enhancing both mechanical and chemical durability.

Dr. Dong-Chan Lim, the project lead, highlighted the broad industrial applications of this breakthrough. “This technology not only significantly improves production yields in roll-to-roll manufacturing processes using film-based flexible substrates but is also applicable to diverse downstream industries such as energy, displays, and robotics. It is a key technology that can increase the localization rate of core materials and components, thereby strengthening the competitiveness of critical industries,” he explained.