Scientists Develop Laser-Based Wireless Charging System for Drones -

Researchers have developed a new wireless charging technology that could one day allow drones to remain airborne for much longer by recharging their batteries with laser beams during flight, potentially reducing the need for frequent landings.

The study, published in the journal Matter & Light, describes a lightweight power receiver that converts energy from a laser beam into electricity. Inspired by solar cell technology, the device uses a perovskite laser cell-thermoelectric (PLC-TE) system, in which the perovskite layer captures laser energy while a thermoelectric layer converts excess heat into additional electricity, improving overall efficiency.

According to the research team, one of the biggest challenges was preventing the receiver from overheating. Tests under high-powered lasers showed temperatures reaching 80–90°C, significantly reducing performance. To address this, the researchers embedded heat-blocking nanocrystals into the device to slow heat transfer and strategically positioned the receiver beneath a drone’s wings, where airflow helps cool the system during operation.

Under a green laser, the device achieved an energy conversion efficiency of 38.49%, making it one of the most efficient laser-powered systems of its kind. As a proof of concept, the researchers mounted the receiver on a stationary drone model and directed a green laser at it, successfully generating enough electricity to power the drone’s propeller. Air channels built into the wing further enhanced cooling, improving the system’s performance.

Lead researcher Jianhua Han of the Civil Aviation University of China said the technology could support future applications such as forest monitoring, disaster response and package delivery, where drones are required to stay in the air for extended periods.

The system is still in the experimental stage and has yet to be tested on a flying drone. Future research will focus on ensuring reliable outdoor performance, accurately tracking moving drones with laser beams and addressing safety concerns before the technology can be deployed commercially. – ERMD/TX