The impact of porosification upon luminescence of HVPE grown GaN and the influence of the porous layer upon the quality of the overgrown GaN film
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BRANISTE, Tudor, POPA, Veaceslav, MARTÍN, Denis, CARLIN, Jean Franc, URSACHI, Veaceslav, GRANDJEAN, Nicolas, TIGINYANU, Ion. The impact of porosification upon luminescence of HVPE grown GaN and the influence of the porous layer upon the quality of the overgrown GaN film. In: Nanotechnologies and Biomedical Engineering, Ed. 3, 23-26 septembrie 2015, Chișinău. Springer, 2015, Editia 3, p. 53.
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Nanotechnologies and Biomedical Engineering
Editia 3, 2015
Conferința "International Conference on Nanotechnologies and Biomedical Engineering"
3, Chișinău, Moldova, 23-26 septembrie 2015

The impact of porosification upon luminescence of HVPE grown GaN and the influence of the porous layer upon the quality of the overgrown GaN film


Pag. 53-53

Braniste Tudor1, Popa Veaceslav1, Martín Denis2, Carlin Jean Franc2, Ursachi Veaceslav3, Grandjean Nicolas2, Tiginyanu Ion13
 
1 Technical University of Moldova,
2 Laboratory of Advanced Semiconductors for Photonics and Electronics, ICMP, EPFL, Lausanne,
3 Institute of the Electronic Engineering and Nanotechnologies "D. Ghitu" of the Academy of Sciences of Moldova
 
 
Disponibil în IBN: 8 aprilie 2019


Rezumat

In this paper, we show that the quality of the porous layers produced by photoelectrochemical (PEC) etching of HVPE GaN in oxalic acid is better than that of the initial material, and the quality of GaN films overgrown on porous layers can be improved by adjusting the conditions of PEC etching during the preparation of porous layers. The better quality of the porous layers produced in HVPE material is indicated by the photoluminescence (PL) analysis which shows a higher intensity of the luminescence related to the recombination of free excitons as well as the intensity of the blue luminescence in the porous layers.