首页|Identifying the effect of photo-generated carriers on the phonons in rutile TiO2 through Raman spectroscopy
Identifying the effect of photo-generated carriers on the phonons in rutile TiO2 through Raman spectroscopy
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Identifying the effect of photo-generated carriers on the phonons in rutile TiO2 through Raman spectroscopy
Investigating lattice vibrations through Raman spectroscopy is a crucial method for studying crystalline materials.Carriers can interact with lattices and influence lattice vibrations;thus,it is feasible to study the effect of photo-generated carriers on phonons by analyzing changes in the Raman spectra of semiconductors.Rutile is one of the predominant crystalline phases of TiO2,which is a widely utilized metal oxide semiconductor.In this work,rutile TiO2 is coated on a thinned optical fiber to concentrate ultraviolet light energy within the material,thereby enhancing the generation of carriers and amplifying the changes in the Raman spectra.A Raman detection laser with a wavelength of 532 nm is utilized to collect the Raman spectra of rutile TiO2 during irradiation.Using this setup,the impact of photo-generated carriers on the phonons corresponding to Raman vibrational modes is researched.The localization and non-radiative recombination of photo-generated carriers contribute to a reduction in both the frequencies and lifetimes of phonons.This work provides a novel approach to researching the effect of carriers on phonons.
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