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Hole injection mechanism in the quantum wells of blue light emitting diode with V pits for micro-display application
- Authors
- Kang, Daesung; Oh, Jeong-Tak; Song, June-O; Seong, Tae-Yeon; Kneissl, Michael; Amano, Hiroshi
- Issue Date
- 1-10월-2019
- Publisher
- IOP PUBLISHING LTD
- Citation
- APPLIED PHYSICS EXPRESS, v.12, no.10
- Indexed
- SCIE
SCOPUS
- Journal Title
- APPLIED PHYSICS EXPRESS
- Volume
- 12
- Number
- 10
- ISSN
- 1882-0778
- Abstract
- The current injection mechanisms for blue light emitting diodes (LEDs) with and without V pits were examined by controlling the bandgaps of InGaN quantum wells (QWs), which were changed by reducing the indium content. To identify the distribution of holes in the QWs, the electroluminescence of the LEDs was characterized by varying the positions of the QWs with the wider bandgap consecutively from n-cladding to p-cladding sides. For the LEDs without V pits, holes were injected through the top QWs (p-cladding side), while for the LEDs with V pits, holes were injected mainly through the bottom QWs (n-cladding side). (C) 2019 The Japan Society of Applied Physics
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