Effect of unevenly-distributed V pits on the optical and electrical characteristics of green micro-light emitting diode
DC Field | Value | Language |
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dc.contributor.author | Lee, Da-Hoon | - |
dc.contributor.author | Kang, Daesung | - |
dc.contributor.author | Seong, Tae-Yeon | - |
dc.contributor.author | Kneissl, Michael | - |
dc.contributor.author | Amano, Hiroshi | - |
dc.date.accessioned | 2021-08-31T12:06:20Z | - |
dc.date.available | 2021-08-31T12:06:20Z | - |
dc.date.created | 2021-06-19 | - |
dc.date.issued | 2020-01-23 | - |
dc.identifier.issn | 0022-3727 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/57959 | - |
dc.description.abstract | In this study, we investigated the effect of different-size V pits on the opto-electrical performance of different-size InGaN-based green (520?nm) light-emitting diodes (LEDs). The size of V pits varied from 57 to 250?nm. Two different-size LEDs (10 and 300 m) were fabricated with flip-chip structures. It was shown that at 4 A cm(?2), the forward voltages of 300 m-size and 10 m-size LEDs were in the range of 2.32?2.82 V and 2.23?2.53 V, respectively. Compared with the LEDs with small V pits, the LEDs with large V pits produced higher output power at the high current region (>50 A cm(?2)), but lower output power at the low current region (<20 A cm(?2)). The 300 m-size LEDs displayed maximum external quantum efficiency (EQE) at 2 A cm(?2), whereas the 10 m-size LEDs exhibited peak EQE at current densities??13 A cm(?2). For all samples, the electroluminescence (EL) wavelengths were blue shifted with increasing current density. Unlike the 300 m-size LEDs, the 10 m-size LEDs exhibited a large deviation in the light output, EQE, and EL wavelength. The 10 m-size LEDs revealed larger S than the 300 m-size LEDs. The backscattered electron (BSE) and monochromatic cathodoluminescence (CL) results showed that for all samples, V pits were unevenly distributed across the whole wafer. Based on the CL and BSE results, the effect of different V pit sizes on the performance of green micro-LEDs at the low current region is described and discussed. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | IOP PUBLISHING LTD | - |
dc.subject | EFFICIENCY | - |
dc.subject | PERFORMANCE | - |
dc.subject | SIZE | - |
dc.title | Effect of unevenly-distributed V pits on the optical and electrical characteristics of green micro-light emitting diode | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Seong, Tae-Yeon | - |
dc.identifier.doi | 10.1088/1361-6463/ab52d0 | - |
dc.identifier.scopusid | 2-s2.0-85077770493 | - |
dc.identifier.wosid | 000501017700001 | - |
dc.identifier.bibliographicCitation | JOURNAL OF PHYSICS D-APPLIED PHYSICS, v.53, no.4 | - |
dc.relation.isPartOf | JOURNAL OF PHYSICS D-APPLIED PHYSICS | - |
dc.citation.title | JOURNAL OF PHYSICS D-APPLIED PHYSICS | - |
dc.citation.volume | 53 | - |
dc.citation.number | 4 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Physics | - |
dc.relation.journalWebOfScienceCategory | Physics, Applied | - |
dc.subject.keywordPlus | EFFICIENCY | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | SIZE | - |
dc.subject.keywordAuthor | micro-light emitting diode | - |
dc.subject.keywordAuthor | V pit size | - |
dc.subject.keywordAuthor | cathodoluminescence | - |
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