Problems of creating high-efficiency sources of ultraviolet radiation based on heterostructures

The main problems of creating highly efficient sources of ultraviolet radiation based on heterostructures are considered in the article. the main physical effects are indicated, limiting the efficiency of the device, such as the effect of current constriction in the vicinity of metal contacts, as well as the phenomenon of total internal reflection of radiation generated in the active region. The list of the following scientific and technical problems is determined, the required solutions for the creation of highly efficient UV radiation sources based on heterostructures with multiple quantum wells.