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(a) The steady-state fluorescence spectra of single crystal nanobelts and time-resolved spectra recorded at the time delays of 0.2, 2, 4, 6, 8, and . (b) Kinetic trace of the luminescence at the wavelength of . The laser pulse shape is also shown as broken lines.
Steady-state fluorescence spectrum of nanobelts (a) with structural disorders and the corresponding transient photoluminescence spectra at a different time delay [(b)–(d)] showing three typical carrier relaxation stages. : the transient spectra peak has a distinct redshift; : one-peak transient spectra with a little redshift; after : two-peak transient spectra. Two vertical broken lines mark the tagged wavelengths.
(a) Kinetic trace of the photoluminescence decay monitored at after excitation by laser. The graphic inset is the expanded view of the marked window. (b) Kinetic trace of the photoluminescence decay monitored at after excitation by laser. The laser pulse shape is shown by the broken lines.
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