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Photocarrier recombination dynamics of SrTiO3

We summarized our recent studies on the photocarrier recombination dynamics of SrTiO3 by means of time-resolved photoluminescence (PL) spectroscopy and transient absorption (TA) spectroscopy. Novel room-temperature blue PL was observed in strongly photoexcited SrTiO3 and electron-doped SrTiO3. We revealed that both PL and TA dynamics are determined by a simple carrier recombination model and nonradiative three-particle Auger process determines the carrier recombination dynamics under high-density photoexcitation. We discussed the temperature-dependent PL spectrum and dynamics of strongly photoexcited SrTiO3.