3 research outputs found
Investigation of charge carrier dynamics in Ti3C2Tx MXene for ultrafast photonics applications
The rapid advancement of nanomaterials has paved the way for various
technological breakthroughs, and MXenes, in particular, have gained substantial
attention due to their unique properties such as high conductivity,
broad-spectrum absorption strength, and tunable band gap. This article presents
the impact of the process parameters on the structural and optical properties
of Ti3C2Tx MXene for application in ultrafast dynamics. XRD along with Raman
spectroscopy studies, confirmed the synthesis of a single phase from their MAX
phase Ti3AlC2. The complete etching of Al and increase in the interplanar
distance is also observed on centrifugation at very high speed. The ultrafast
transient absorption spectroscopy used to understand the effect of centrifuge
speed on the charge carrier dynamics and ultrafast spectrum of MXene displayed
that the carrier lifetime is critically influenced by rotation per minute (rpm)
e.g. faster decay lifetime at 10k rpm than 7k rpm. The electronic relaxation
probed using the time-resolved photoluminescence (TRPL) technique exhibits an
average decay time of 5.13 ns and 5.35 ns at the 7k and 10k rpm, respectively,
which confirms that the optical properties of the MXene are strongly affected
by the centrifuge speed. The synthesized MXene at 10k rpm typically suggests
that radiative processes due to longer decay lifetime and experiences fewer
nonradiative losses, resulting in enhanced luminescence properties.Comment: 21 pages , 6 figure