Direct evidence for carbon incorporation on the nitrogen site in AlN

2024/05/22 by Darshana Wickramaratne, Mackenzie Siford, Wickramaratne, Darshana +7 · 1 citation
Chemical Engineering · Materials Science · #Advanced ceramic materials synthesis #Ammonia Synthesis and Nitrogen Reduction #Catalytic Processes in Materials Science #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci)

paper · pdf · doi:10.48550/arxiv.2405.13299

openalex publication_date 2024/05/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We use photo-electron paramagnetic resonance (EPR) measurements and first-principles calculations to identify and explain the properties of carbon in AlN. We present clear evidence for carbon substitution on the nitrogen site (C_{\rm N}). We also clarify the origin of a widely observed EPR spectra in AlN that, although often attributed to a deep donor defect, we demonstrate is surprisingly due to C_{\rm N}. Finally, we show the presence of C_{\rm N} is consistent with the absorption spectra at 4.7 eV observed in AlN.

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