Exciton localization in (11(2)over-bar2)-oriented semi-polar InGaN multiple quantum wells

Mortezza Monaravian; Daniel Rosales; Bernard Gil; Natalia Izyumskaya; Umit Ozgur; Vitaliy Avrutin; Hadis Morkoc

doi:10.1117/12.2213835

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Exciton localization in (11(2)over-bar2)-oriented semi-polar InGaN multiple quantum wells

Mortezza Monaravian, Daniel Rosales, Bernard Gil, Natalia Izyumskaya, Umit Ozgur, Vitaliy Avrutin et Hadis Morkoc

proceedings of SPIE, (974826)

Proc. SPIE 9748

Gallium Nitride Materials and Devices XI, (San francisco, United States, 07/02/2016–12/02/2016)

01/12/2016

DOI: https://doi.org/10.1117/12.2213835

Résumé

Excitonic recombination dynamics in (11-22) -oriented semipolar In0.2Ga0.8N/In0.06Ga0.94N multiquantum wells (MQWs) grown on GaN/m-sapphire templates have been investigated by temperature-dependent time-resolved photoluminescence (TRPL). The radiative and nonradiative recombination contributions to the PL intensity at different temperatures were evaluated by analysing temperature dependences of PL peak intensity and decay times. The obtained data indicate the existence of exciton localization with a localization energy of Eloc(15K) =7meV and delocalization temperature of Tdeloc = 200K in the semipolar InGaN MQWs. Presence of such exciton localization in semipolar (11-22) -oriented structures could lead to improvement of excitonic emission and internal quantum efficiency.

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Titre: Exciton localization in (11(2)over-bar2)-oriented semi-polar InGaN multiple quantum wells
Créateurs - sans rôle: Mortezza Monaravian - Virginia Commonwealth University
Daniel Rosales - Université de Montpellier, Laboratoire Charles Coulomb - L2C
Bernard Gil - Université de Montpellier, Laboratoire Charles Coulomb - L2C
Natalia Izyumskaya - Virginia Commonwealth University
Umit Ozgur - Virginia Commonwealth University
Vitaliy Avrutin - Virginia Commonwealth University
Hadis Morkoc - Virginia Commonwealth University
Détails de publication: proceedings of SPIE, (974826)
Colloque: Gallium Nitride Materials and Devices XI, (San francisco, United States, 07/02/2016–12/02/2016)
Publications en série: Proc. SPIE 9748
Identifiants: 99151250909311
Unité académique: Laboratoire Charles Coulomb - L2C
Langue: English
Type de ressource: Conference proceeding
Champs locaux: hal-01406941