Tripling the light extraction efficiency of a deep ultraviolet LED using a nanostructured p-contact.

ABSTRACT: Despite a wide array of applications, deep ultra-violet light emitting diodes offer relatively poor efficiencies compared to their optical counterparts. A contributing factor is the lower light extraction efficiency due to both highly absorbing p-contacts and total internal reflection. Here, we propose a structure consisting of a hexagonal periodic array of cylindrical nanoholes in the multi-layered p-contact which are filled with platinum. This nanostructure reduces the absorption of the p-contact layer, leading to a higher emission into the n-contact compared to a planar reference. An optimum geometry of the nanostructure allows a light extraction efficiency of 15.0%, much higher than the typical 4.6% of a planar reference. While the nanostructure strongly decreases the light absorption

SUBMITTER: Lopez-Fraguas E 

PROVIDER: S-EPMC9262900 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature