The researchers achieved highly efficient luminescence in the deep ultraviolet spectrum using moiré quantum wells in the hBN material. This material enables efficient light emission in the deep ultraviolet range. The study was published in the journal Science, Volume 391, Issue 6791, in March 2026. The main finding is the high efficiency of luminescence in these structures. Moiré quantum wells in hBN create suitable conditions for this luminescence. The results pave the way for applications in optoelectronics.