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Light emission from SrTiO 3
Author(s) -
Kanemitsu Yoshihiko,
Yamada Yasuhiro
Publication year - 2011
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.201000643
Subject(s) - photoexcitation , photoluminescence , materials science , auger effect , doping , perovskite (structure) , electron density , spectroscopy , semiconductor , electron , molecular physics , atomic physics , optoelectronics , auger , chemistry , excited state , physics , crystallography , quantum mechanics
We summarized our recent optical studies on perovskite semiconductor SrTiO 3 crystals. Photocarrier recombination dynamics of undoped, electron‐doped, and vacancy‐doped SrTiO 3 crystals were studied by photoluminescence (PL) and transient absorption (TA) spectroscopy. By high‐density photoexcitation and electron doping, the blue PL is clearly observed in SrTiO 3 crystals at room temperature. The PL spectrum and dynamics are sensitive to the photoexcited carrier density and the chemically doped electron density. The PL and TA decay dynamics under high‐density excitation are determined by nonradiative Auger recombination. It is demonstrated that the PL lifetime can be used as a probe for determining spatial profiles of carriers and defects in SrTiO 3 .