Transcription of Multi-phonon assisted upconversion emission and power ...
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Multi-phonon assisted upconversion emission and power ...
Multi-phonon assisted upconversion emission and powerdependence studies in LaF3:Er3+ Singha, K. Kumarb,c, , Pandeyc, Raid, D. KumaraaDepartment of Ceramic Engineering, IIT-BHU, Varanasi 221 005, IndiabDepartment of Applied Physics, ISM, Dhanbad 826 004, IndiacNanotechnology Application Centre, Allahabad University, Allahabad 211 002, IndiadLaser & Spectroscopy Laboratory, Physics Department, BHU, Varanasi 221 005, Indiahighlights"Observation of UV bands in LaF3:Er3+phosphor on 532-nm excitation."Multiphonon assisted energymigration from2H11/2(4S3/2) level tothe upper4F3/2,4F5/2and4F7/2levels."Reversal in intensity of 411 and488 nm emission bands withexcitation power or the sampletemperature.
lation gives the crystallite size whereas TEM image visualize parti-cle size. A single particle may contain number of crystallites. Fourier transform infrared (FTIR) analysis
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