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Eu concentration dependence on structural and optical properties of Eu‐doped GaN
Author(s) -
Bang Hyungjin,
Morishima Shinichi,
Tsukamoto Takaharu,
Li Zhiqiang,
Sawahata Junji,
Seo Jongwon,
Takiguchi Mikio,
Bando Yoshio,
Akimoto Katsuhiro
Publication year - 2004
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200405027
Subject(s) - luminescence , europium , crystallite , doping , quenching (fluorescence) , materials science , reflection high energy electron diffraction , diffraction , electron diffraction , analytical chemistry (journal) , lanthanide , ion , chemistry , optics , fluorescence , optoelectronics , physics , metallurgy , chromatography , organic chemistry
Abstract The structural and optical properties of europium‐doped GaN were studied. The Eu‐related luminescence was observed at 622 nm and originated from the intra‐4f transition of the Eu 3+ ion. The intensity of the luminescence increased as the Eu concentration increased up to about 3 at%, and then abruptly decreased. In‐situ reflection high‐energy electron diffraction (RHEED) and X‐ray diffraction (XRD) were carried out to study this luminescence quenching, and it was discovered that there is a close relationship between the luminescence intensity at 622 nm and the structural properties. The cause of the concentration quenching is likely related to the polycrystalline growth as well as to the formation of EuN. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)