Strain-reduced micro-LEDs grown directly using partitioned growth

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buir.contributor.authorDemir, Hilmi Volkan
buir.contributor.orcidDemir, Hilmi Volkan|0000-0003-1793-112X
dc.citation.epage639023/6en_US
dc.citation.spage639023/1en_US
dc.citation.volumeNumber9en_US
dc.contributor.authorLu, S.
dc.contributor.authorZhang, Y.
dc.contributor.authorZhang, Z.-H.
dc.contributor.authorTsai, P. C.
dc.contributor.authorZhang, X.
dc.contributor.authorZhang, S. T.
dc.contributor.authorDemir, Hilmi Volkan
dc.date.accessioned2022-02-15T11:13:42Z
dc.date.available2022-02-15T11:13:42Z
dc.date.issued2021-03-10
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.departmentDepartment of Physicsen_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.description.abstractStrain-reduced micro-LEDs in 50 μm × 50 μm, 100 μm × 100 μm, 200 μm × 200 μm, 500 μm × 500 μm, and 1,000 μm × 1,000 μm sizes were grown on a patterned c-plane sapphire substrate using partitioned growth with the metal-organic chemical-vapor deposition (MOCVD) technique. The size effect on the optical properties and the indium concentration for the quantum wells were studied experimentally. Here, we revealed that the optical properties can be improved by decreasing the chip size (from 1,000 to 100 µm), which can correspondingly reduce the in-plane compressive stress. However, when the chip size is further reduced to 50 μm × 50 μm, the benefit of strain release is overridden by additional defects induced by the higher indium incorporation in the quantum wells and the efficiency of the device decreases. The underlying mechanisms of the changing output power are uncovered based on different methods of characterization. This work shows the rules of thumb to achieve optimal power performance for strain-reduced micro-LEDs through the proposed partitioned growth process.en_US
dc.identifier.doi10.3389/fchem.2021.639023en_US
dc.identifier.eissn2296-2646
dc.identifier.urihttp://hdl.handle.net/11693/77376
dc.language.isoEnglishen_US
dc.publisherFrontiers Media S.A.en_US
dc.relation.isversionofhttps://doi.org/10.3389/fchem.2021.639023en_US
dc.source.titleFrontiers in Chemistryen_US
dc.subjectMicro-LEDen_US
dc.subjectStrain releaseen_US
dc.subjectPartitioned growth modelen_US
dc.subjectSize effecten_US
dc.subjectQCSEen_US
dc.subjectRamanen_US
dc.titleStrain-reduced micro-LEDs grown directly using partitioned growthen_US
dc.typeArticleen_US
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