Journal
OPTICS EXPRESS
Volume 28, Issue 8, Pages 12311-12321Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.389725
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- King Abdullah University of Science and Technology [BAS/1/1676-01-01]
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Fabrication of indium tin oxide (ITO) was optimized for InGaN-based amber/red light-emitting diodes (LEDs). A radiofrequency sputtering reduced the sheet resistivity of ITO at low pressures, and a subsequent two-step annealing resulted in a low sheet resistivity (below 2 x 10(-4) Omega cm) and high transmittance (over 98%) in the amber and red regions between 590 nm to 780 nm. Double ITO layers by sputtering could form an excellent ohmic contact with p-GaN. Application of the double ITO layers on amber and red LEDs enhanced light output power by 15.6% and 13.0%, respectively, compared to those using ITO by e-beam evaporation. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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