Magneto-optical properties and recombination dynamics of isoelectronic bound excitons in ZnO
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چکیده
Magneto-optical and time-resolved photoluminescence (PL) spectroscopies are employed to evaluate electronic structure of a bound exciton (BX) responsible for the 3.364 eV line (labeled as I1) in bulk ZnO. From timeresolved PL spectroscopy, I1 is concluded to originate from the exciton ground state. Based on performed magneto-PL studies, the g-factors of the involved electron and hole are determined as being ge = 1.98 and gh ( gh) = 1.2 (1.62), respectively. These values are nearly identical to the reported g-factors for the I line in ZnO (Phys. Rev. B 86, 235205 (2012)), which proves that I1 should have a similar origin as I and should arise from an exciton bound to an isoelectronic center with a hole-attractive potential.
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تاریخ انتشار 2014