Edit here in Slide Master Slide 2 Table of contents
1.Introduction to Laboratory 2.Raman spectroscopy 3.
Photoluminescence Slide 3 Edit here in Slide Master 1. Introduction
to Laboratory Slide 4 Edit here in Slide Master Slide 5
Introduction to Laboratory Graphene 2-dimensional (2D) honeycomb
lattice consisting of carbon atoms Solar Cell Semiconductors which
convert Sun light into electricity Raman spectroscopy,
Photoluminescence Slide 6 Edit here in Slide Master 2. Raman
spectroscopy Slide 7 Edit here in Slide Master Raman spectroscopy
In the Raman effect a photon is scattered inelastically by a
crystal, with creation or annihilation of a phonon.
RayleighAnti-Stokes Stokes Virtual state =0 1 2 Slide 8 Edit here
in Slide Master Phonon quantized elastic wave simple model of
phonon linear lattice of particles connected by springs. Phonon
Slide 9 Edit here in Slide Master Phonon Slide 10 Edit here in
Slide Master Phonon Optical The atoms vibrate against each other,
but their center of mass is fixed. Acoustic The atoms move
together. Raman probes k=0 because of the very small momentum of
photon Slide 11 Edit here in Slide Master Example of Raman spectrum
-Raman spectrum of single crystal CZTSe Slide 12 Edit here in Slide
Master 3. Photoluminescence Slide 13 Edit here in Slide Master
Photoluminescence (PL) Slide 14 Edit here in Slide Master
Photoluminescence (PL) DFT(Density Functional Theory) Tight binding
First principle kp perturbation theory Solution of Hamiltonian
Slide 15 Edit here in Slide Master Tight binding model in 1D Slide
16 Edit here in Slide Master Application of PL GaAs band structure
Diatomic crystal (2 atoms per unit cell) Slide 17 Edit here in
Slide Master Thanks for your attention! Q&A
