The scientists built a prototype of the system using a model of a drone and attached a receiver that works similarly to a solar cell. Fixed to the underside of the wing, the receiver successfully converted the energy from the laser beam into electricity to power the aircraft’s propellers.
"Previous studies largely focused on the materials or the device itself," study senior author Jianhua Han, a researcher at the Civil Aviation University of China, said in a statement. "We wanted to think beyond the laboratory, to how the system could actually be integrated into an aircraft, cooled during operation, and made compatible with flight. It isn’t just a materials science problem; it’s an engineering one."
Perovskite is a highly efficient material used in cutting-edge solar cells, noteworthy for its crystal structure that allows it to capture more wavelengths of the light spectrum than silicon. For this reason, it’s prized as a future solar material, with some research indicating it could even be used to convert ambient indoor light into usable electricity.
In initial testing, the researchers discovered an unwelcome side effect of using the laser: the drone was being heated to extreme temperatures, reducing its overall efficiency.
Following initial testing using a model, scientsts plan to wirelessly charge a real drone mid-flight. (Image credit: Y. Han and X. Han et al. (2026))To combat this, the researchers introduced nanocrystals made from antimony triselenide — an abundant semiconductor material — into the PLC-TE design. This plays the role of a thermal barrier, preventing the device from releasing too much heat.
Overcoming battery life barriers
"Imagine a future where drones inspecting forests, monitoring disasters, or delivering packages no longer need to land frequently to replace batteries,” said Han. "As drones take on longer missions, battery life has become one of the biggest barriers."
Going forward, the researchers will test how the device functions on a real lightweight drone in outdoor conditions.
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In June 2025, the U.S. Defense Advanced Research Projects Agency (DARPA) successfully beamed 800 watts of power over a distance of 5.3 miles (8.6 kilometers), as part of its Persistent Optical Wireless Energy Relay (POWER) program.
Private companies such as PowerLight Technologies, in collaboration with the U.S. Department of Defense, have said they could deliver kilowatts of energy to in-flight drones operating at altitudes of up to 5,000 feet (1,500 meters).
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