Smartphones provided a very quick and fast way of communication. With every new day stylish, attractive and advanced smartphones catching people’s attentions. Though it eased communication however, power problem is always stick with smartphones. Its very common in modern smartphones that battery doesn’t last long enough. Now as screens are getting bigger and bigger battery life is getting shorter and shorter.
Arman Ahnood, a researcher at the London Centre for Nanotechnology has come up with an ingenious useful solution – smartphone screens with built-in solar cells. He said, “Only 36% of the light produced by an OLED display is projected straight out; the rest is wasted, either as scattered light or bleeding from the edge of the display”.
He placed photovoltaic cells at the back and sides of OLED screens to save this wasted energy. The results of Ahnood’s system (consists of a supercapacitor and some circuitry) were surprising good as it works at 11% of efficiency with five miliwatts output but only for a 3.7-inch device.
According to his research, “A typical smartphone uses up to several hundred miliwatts, and as much as 68.6 miliwatts in a suspended state”. So his early experiment isn’t that promising however efficiency can be increased and we can save hours of battery life.