The first perovskite laser was demonstrated in 2014, and the technology is still several steps removed from being energy-efficient and viable for commercial applications. “Right now, there are no mass-produced lasers using perovskite,” Gu said. “In its current form, there is a lot of wasted energy used to make the perovskite laser work. To operate, perovskite lasers currently require assistance from bulky, optically pumped lasers. “In its current form, there is a lot of wasted energy used to make the perovskite laser work,” Gu said.