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Journal Articles physica status solidi (a) Year : 2022

Light Polarization in Tunnel Junction Injected UV Light‐Emitting Diodes

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Abstract

The polarization of the light emitted by an ultraviolet light-emitting diode (LED) has a direct impact on the device performance: a transverse electric polarization of the emission is preferred for extraction from the surface of the diode grown along the c axis. While this is the case for most UV LEDs grown on AlN, this state of events could be called into question when a tunnel junction (TJ) is added to make up for the poor p doping in Al-rich (Al,Ga)N and improve the hole injection. Indeed, nitride-based TJs mainly inject holes with a Γ7 symmetry, which could lead to transverse magnetic polarization of the light emitted by the diode. We have experimentally investigated this important issue and delivered a clear answer to this question.
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Dates and versions

hal-03828269 , version 1 (16-12-2022)

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Jean-Yves Duboz, Victor Fan Arcara, Cynthia Kessaci, Stéphane Vézian, Benjamin Damilano. Light Polarization in Tunnel Junction Injected UV Light‐Emitting Diodes. physica status solidi (a), 2022, 219 (7), pp.2200055. ⟨10.1002/pssa.202200055⟩. ⟨hal-03828269⟩
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