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dc.contributor.authorGriffin, Peteren
dc.contributor.authorZhu, Tongtongen
dc.contributor.authorOliver, Rachelen
dc.date.accessioned2018-11-13T00:30:50Z
dc.date.available2018-11-13T00:30:50Z
dc.date.issued2018-08-21en
dc.identifier.issn1996-1944
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/284965
dc.description.abstractUtilising dislocation-related vertical etching channels in gallium nitride, we have previously demonstrated a simple electrochemical etching (ECE) process which can create layered porous GaN structures to form distributed Bragg reflectors for visible light at wafer scale. Here, we apply the same ECE process to realise AlGaN-based ultraviolet DBRs. These are of interest because they could provide a pathway to non-absorbing UV reflectors to enhance the performance of UV LEDs, which currently have extremely low efficiency. We have demonstrated porous AlGaN-based UV DBRs with a peak reflectance of 89 % at 324 nm. The uniformity of these devices is currently low, as the as-grown material has a high density of V-pits and these alter the etching process. However, our results indicate that if the material growth is optimised, the ECE process will be useful for the fabrication of UV reflectors.
dc.format.mediumElectronicen
dc.languageengen
dc.rightsAttribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titlePorous AlGaN-Based Ultraviolet Distributed Bragg Reflectors.en
dc.typeArticle
prism.issueIdentifier9en
prism.publicationDate2018en
prism.publicationNameMaterials (Basel, Switzerland)en
prism.volume11en
dc.identifier.doi10.17863/CAM.32336
dcterms.dateAccepted2018-08-16en
rioxxterms.versionofrecord10.3390/ma11091487en
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2018-08-21en
dc.contributor.orcidGriffin, Peter [0000-0003-4239-9227]
dc.contributor.orcidZhu, Tongtong [0000-0002-9481-8203]
dc.identifier.eissn1996-1944
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idEPSRC (EP/R511675/1)
pubs.funder-project-idEPSRC (EP/M010589/1)
pubs.funder-project-idEPSRC (1645842)
pubs.funder-project-idEPSRC (EP/M011682/1)
pubs.funder-project-idEPSRC (1645842)
pubs.funder-project-idEPSRC (EP/R04502X/1)


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Attribution 4.0 International
Except where otherwise noted, this item's licence is described as Attribution 4.0 International