Origin of orange color in nominally undoped HVPE GaN crystals
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F17%3AN0000034" target="_blank" >RIV/26722445:_____/17:N0000034 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.optmat.2017.05.020" target="_blank" >http://dx.doi.org/10.1016/j.optmat.2017.05.020</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.optmat.2017.05.020" target="_blank" >10.1016/j.optmat.2017.05.020</a>
Alternative languages
Result language
angličtina
Original language name
Origin of orange color in nominally undoped HVPE GaN crystals
Original language description
In this article we investigated unintentionally doped (UID) GaN grown by hydride vapor phase epitaxy (HVPE) with respect to point defects and impurity concentration. The samples were orange tinted to different extent. Optical analysis was performed by micro-photoluminescence and absorption spectroscopy. Absorption measurements revealed an absorption peak at 1.5 eV related to an internal transition in Mn3+ impurities and a second band with low energy onset at 1.9 eV, both increasing with the extent of orange color. Electron paramagnetic resonance investigations showed the presence of Mn2+ and Fe3+ in the colored crystals. The overall impurity concentration was verified by secondary ion mass spectrometry. Orange tint is associated with an increase of transition metal contamination, especially Mn. Based on these observations we suggest that the orange coloring in the investigated UID HVPE GaN samples is caused by the presence of Mn impurities.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20501 - Materials engineering
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Optical Materials
ISSN
0925-3467
e-ISSN
1873-1252
Volume of the periodical
70
Issue of the periodical within the volume
August
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
4
Pages from-to
127-130
UT code for WoS article
000404203800018
EID of the result in the Scopus database
2-s2.0-85019561768