| Autor: |
L pez Fraguas, E., Binkowski, F., Burger, S., Hagedorn, S., Garc a C mara, B., Vergaz, R., Becker, C., Manley, P. |
| Přispěvatelé: |
Ministerio de Ciencia e Innovación (España) |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Scientific reports. 12(1) |
| ISSN: |
2045-2322 |
| Popis: |
Despite a wide array of applications, deep ultra amp; 8209;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 amp; 8209;contacts and total internal reflection. Here, we propose a structure consisting of a hexagonal periodic array of cylindrical nanoholes in the multi amp; 8209;layered p amp; 8209;contact which are filled with platinum. This nanostructure reduces the absorption of the p amp; 8209;contact layer, leading to a higher emission into the n amp; 8209;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 in the p amp; 8209;contact, it is still not able to considerably reduce the total internal reflection. Consequently, the nanostructured p amp; 8209;contact should be combined with other optical strategies, such as nanopatterned sapphire substrates to increase the efficiency even further. Despite this, the nanostructure described in this work provides a readily realizable path to enhancing the light extraction efficiency of state amp; 8209;of amp; 8209; the amp; 8209;art deep ultra amp; 8209;violet light emitting diodes |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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