Effects of nitrogen incorporation and thermal annealing on the optical and spin properties of GaPN dilute nitride alloys

Miguel Angel Gonzalez Balanta; P. B. Alves de Oliveira; H. Albalawi; Yara Galvão Gobato; Helder Vinícius Avanço Galeti; A.D. Rodrigues; Mohamed Henini; Samy Almosni; Cédric Robert; Andréa Balocchi; Yoan Léger; Hélène Carrère; Mounib Bahri; Gilles Patriarche; Xavier Marie; Charles Cornet

doi:10.1016/j.jallcom.2019.152233

Effects of nitrogen incorporation and thermal annealing on the optical and spin properties of GaPN dilute nitride alloys

Miguel Angel Gonzalez Balanta ^{1, 2} P. B. Alves de Oliveira ¹ H. Albalawi ^{1, 3} Yara Galvão Gobato ¹ Helder Vinícius Avanço Galeti ¹ A.D. Rodrigues ¹ Mohamed Henini ⁴ Samy Almosni ⁵ Cédric Robert ⁶ Andréa Balocchi ⁶ Yoan Léger ⁵ Hélène Carrère ⁶ Mounib Bahri ⁷ Gilles Patriarche ⁷ Xavier Marie ⁶ Charles Cornet ⁵

1 UFSCar - Federal University of São Carlos

2 Universidade Federal de Uberlândia - UFU (BRAZIL)

3 Princess Nourah Bint Abdulrahman University

4 UON - University of Nottingham, UK

5 Institut FOTON - Institut des Fonctions Optiques pour les Technologies de l'informatiON

6 LPCNO - Laboratoire de physique et chimie des nano-objets

7 C2N (UMR_9001) - Centre de Nanosciences et Nanotechnologies

Abstract : Here, we report on the structural, optical and magneto-optical properties of as-grown and thermal annealed GaPN thin films containing different N concentrations grown by Solid-Source Molecular Beam Epitaxy on GaP substrates. A wide range of characterization techniques were used to investigate the effect of N incorporation and thermal annealing effect of GaPN/GaP epilayers for a N content between 0.5% and 3%. Our results have shown that as we increase the N content the PL peak energy presents a red shift which is explained by a band gap reduction. However, important effects of exciton localization on optical properties were also evidenced from cw and time resolved PL (PLRT) and magneto-PL. Our results have demonstrated that as the concentration of N is increased, exciton localization effect is enhanced. A substantial improvement of the optical quality and spin properties of the epilayers has been observed after thermal annealing which are significantly more important for samples with higher nitrogen contents.

Keywords : Dilute nitrides Semiconductor alloys Optical properties Solar cells GaPN

Document type :

Journal articles

Domain :

Physics [physics] / Condensed Matter [cond-mat]

Complete list of metadatas

https://hal-cnrs.archives-ouvertes.fr/hal-02351836
Contributor : Gilles Patriarche <>
Submitted on : Wednesday, November 6, 2019 - 3:32:25 PM
Last modification on : Monday, February 10, 2020 - 6:14:19 PM

HAL-CNRS

Effects of nitrogen incorporation and thermal annealing on the optical and spin properties of GaPN dilute nitride alloys

Identifiers

Collections

Citation

Export

Metrics

115

Contact

Informations

HAL-CNRS

Effects of nitrogen incorporation and thermal annealing on the optical and spin properties of GaPN dilute nitride alloys

Identifiers

Collections

Citation

Export

Share

Metrics

115

Contact

Informations