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Tuning the emission of ZnO nanorods based light emitting diodes using Ag doping
Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, The Institute of Technology. Shahid Chamran University of Ahvaz, Iran.
Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, The Institute of Technology.
Shahid Chamran University of Ahvaz, Iran.
Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, The Institute of Technology.
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2014 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 116, no 19, 2-9 p.Article in journal (Refereed) Published
Abstract [en]

We have fabricated, characterized, and compared ZnO nanorods/p-GaN and n-Zn0.94Ag0.06O nanorods/p-GaN light emitting diodes (LEDs). Current-voltage measurement showed an obvious rectifying behaviour of both LEDs. A reduction of the optical band gap of the Zn0.94Ag0.06O nanorods compared to pure ZnO nanorods was observed. This reduction leads to decrease the valence band offset at n-Zn0.94Ag0.06O nanorods/p-GaN interface compared to n-ZnO nanorods/p-GaN heterojunction. Consequently, this reduction leads to increase the hole injection from the GaN to the ZnO. From electroluminescence measurement, white light was observed for the n-Zn0.94Ag0.06O nanorods/p-GaN heterojunction LEDs under forward bias, while for the reverse bias, blue light was observed. While for the n-ZnO nanorods/p-GaN blue light dominated the emission in both forward and reverse biases. Further, the LEDs exhibited a high sensitivity in responding to UV illumination. The results presented here indicate that doping ZnO nanorods might pave the way to tune the light emission from n-ZnO/p-GaN LEDs.

Place, publisher, year, edition, pages
American Institute of Physics (AIP) , 2014. Vol. 116, no 19, 2-9 p.
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Electrical Engineering, Electronic Engineering, Information Engineering
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URN: urn:nbn:se:liu:diva-113056DOI: 10.1063/1.4902526ISI: 000345513700004OAI: oai:DiVA.org:liu-113056DiVA: diva2:778299
Note

Funding Agencies|Linkoping University; Shahid chamran university of Ahvaz

Available from: 2015-01-09 Created: 2015-01-08 Last updated: 2017-12-05

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