Photovoltaic perovskites can detect neutrons

https://actu.epfl.ch/news/photovoltaic-perovskites-can-detect-neutrons/

"can measure the direction of neutron flow, and the size of the flow... It’s simple, it’s cheap, and it’s cost-effective... Now that the team has shown that the device works, the next step is refinement and potential commercialization"