AV Krukau

EF Schubert

G Kresse

GA Slack

GA Wolff

H Akamatsu

H-P Komsa

HJ Lozykowski

J Heyd

JLF Da Silva

N Hirosaki

N Shuji

PE Blöchl

PJ Hay

R Ishikawa

R-J Xie

RF Rutz

S Koizumi

S Lany

S Nakamura

SJ Pennycook

T Koubaa

T Taniguchi

U Vetter

Y Melnik

Y Taniyasu

Scientific Reports

AbstractRare-earth doped wurtzite-type aluminum nitride (w-AlN) has great potential for high-efficiency electroluminescent applications over a wide wavelength range. However, because of their large atomic size, it has been difficult to stably dope individual rare-earth atoms into the w-AlN host lattice. Here we use a reactive flux method under high pressure and high temperature to obtain cerium (Ce) doped w-AlN single crystals with pink-colored luminescence. In order to elucidate the atomic structure of the luminescent centers, we directly observe individual Ce dopants in w-AlN using annular dark-field scanning transmission electron microscopy. We find that Ce is incorporated as single, isolated atoms inside the w-AlN lattice occupying Al substitutional sites. This new synthesis method represents a new alternative strategy for doping size-mismatched functional atoms into wide band-gap materials.</jats:p

Ryo Ishikawa

Andrew R. Lupini

Fumiyasu Oba

Scott D. Findlay

Naoya Shibata

Takashi Taniguchi

Kenji Watanabe

Hiroyuki Hayashi

Toshifumi Sakai

Isao Tanaka

Yuichi Ikuhara

Stephen J. Pennycook

Crossref

Atomic Structure of Luminescent Centers in High-Efficiency Ce-doped w-AlN Single Crystal

Atomic Structure of Luminescent Centers in High-Efficiency Ce-doped w-AlN Single Crystal

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