In a groundbreaking development for flexible electronics, researchers at the Universitat de Barcelona have unveiled an ultra-low power wake-up timer designed specifically for flexible integrated circuits (FlexICs). This innovation is particularly significant for applications in remote sensors and wearables, where energy efficiency is paramount. The research, led by D. Narbón, presents a solution that could revolutionize how devices operate within stringent power budgets, making them more viable for widespread use in various sectors, including construction.
The timer operates by periodically transitioning an external circuit from a deep-sleep state to an active state, significantly reducing overall power consumption. “Our timer utilizes the inherent leakage current of transistors to generate a low-frequency wake-up signal, which allows for minimal energy use while maintaining functionality,” Narbón explained. This approach is especially advantageous for systems that rely solely on n-type transistors, which are frequently used in flexible electronics.
The design leverages a sustainable production process developed by PragmatIC, utilizing Indium Gallium Zinc Oxide (IGZO) thin-film transistors. This compatibility with n-FET based technologies opens the door for integrating the timer into a variety of flexible devices, enhancing their operational efficiency. The timer achieves a mean wake-up frequency of 0.24 Hz, with a remarkably low average power consumption of just 26.7 nW. Such efficiency not only extends battery life but also reduces the environmental impact of electronic waste—a growing concern in the construction and technology sectors.
The implications of this research extend beyond mere energy savings. In the construction industry, where smart sensors are increasingly deployed for monitoring and automation, the ability to maintain operational efficiency without frequent battery replacements can lead to significant cost reductions and improved project sustainability. “This technology paves the way for smarter, more energy-efficient construction practices, enabling devices that can operate longer and with less maintenance,” Narbón noted.
As the demand for flexible electronics continues to rise, particularly in areas such as smart buildings and IoT applications, the development of such low-power components is critical. The potential for widespread adoption of this timer could inspire a new wave of innovations in building management systems, enhancing their responsiveness and reducing energy consumption.
This research was published in the journal ‘npj Flexible Electronics,’ which translates to ‘npj Electrónica Flexible’ in English. As flexible electronics become more integral to modern construction practices, the work of Narbón and his team represents a significant step forward, promising to reshape how we think about energy efficiency in the built environment. For more information, you can visit the Department of Electronics and Biomedical Engineering, Universitat de Barcelona.
