P-doping-free InGaN/GaN light-emitting diode driven by three-dimensional hole gas

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P-doping-free InGaN GaN light-emitting diode driven by three-dimensional hole gas.pdf (1.11 MB)

Date

2013

Authors

Zhang, Z.-H.
Tiam Tan, S.
Kyaw, Z.
Liu W.
Ji, Y.
Ju, Z.
Zhang X.
Wei Sun X.
Volkan Demir H.

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Source Title

Applied Physics Letters

Print ISSN

0003-6951

Electronic ISSN

Publisher

Volume

103

Issue

26

Pages

Language

English

Type

Article

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Abstract

Here, GaN/AlxGa1-xN heterostructures with a graded AlN composition, completely lacking external p-doping, are designed and grown using metal-organic-chemical-vapour deposition (MOCVD) system to realize three-dimensional hole gas (3DHG). The existence of the 3DHG is confirmed by capacitance-voltage measurements. Based on this design, a p-doping-free InGaN/GaN light-emitting diode (LED) driven by the 3DHG is proposed and grown using MOCVD. The electroluminescence, which is attributed to the radiative recombination of injected electrons and holes in InGaN/GaN quantum wells, is observed from the fabricated p-doping-free devices. These results suggest that the 3DHG can be an alternative hole source for InGaN/GaN LEDs besides common Mg dopants. © 2013 AIP Publishing LLC.

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Keywords

Capacitance voltage measurements , InGaN/GaN , Ingan/gan leds , InGaN/GaN quantum well , Injected electrons , Mg dopants , P-doping , Radiative recombination , Gases , Metallorganic chemical vapor deposition , Light emitting diodes

Citation

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http://hdl.handle.net/11693/26694

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http://dx.doi.org/10.1063/1.4858386

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Department of Electrical and Electronics Engineering
Department of Physics
Institute of Materials Science and Nanotechnology (UNAM)