Thermal management towards ultra-bright and stable perovskite nanocrystal-based pure red light-emitting diodes.

ABSTRACT: Despite the promising candidacy of perovskite nanocrystals for light-emitting diodes, their pure red electroluminescence is hindered by low saturated luminance, severe external quantum efficiency roll-off, and inferior operational stability. Here, we report ultra-bright and stable pure red light-emitting diodes by manipulating Joule heat generation in the nanocrystal emissive layer and thermal management within the device. Diphenylphosphoryl azide-mediated regulation of the nanocrystal surface synergistically enhances the optical properties and carrier transport of the emissive layer, enabling reduced Joule heat generation and thus lowering the working temperature. These merits inhibit ion migration of the CsPb(Br/I)₃ nanocrystal film, promising excellent spectra stability. Comb

SUBMITTER: Li H 

PROVIDER: S-EPMC11297279 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature