Around the world, there are currently more than 18 billion internet-connected mobile devices. In the next 10 years, anticipated growth in the internet of Things (IoT) and in machine-type communication in general, will lead to a world of hundreds of billions of data-connected objects. Such growth poses two very challenging problems:
source https://phys.org/news/2021-03-plastic-solar-cells-combine-high-speed.html
