Utilizing the knowledge of experimentally measured permitivity of the Organic Inorganic tri-halide perovskites, could we find out the Exciton Binding Energy and effective exciton reduced mass?
How the relation can be established?
Cheers!..
dear Khursheed Parrey ;
Two of the most important parameters are the binding energy of the exciton (R*) and its reduced effective mass μ. you can consider the excitonic states as a hydrogenic atom in the magnetic field and the Landau levels for free carriers to give R* and μ. . Both of these levels originate from the same Landau level giving a very strong constraint in the determination of the exciton binding energy, which scales for a 3D hydrogen atom in zero magnetic field as: En = Eg − R ∗ n 2 (2) where En is the energy of n-th excitonic level and R ∗ = R0µ/m0ε 2 r , where R0 is the atomic Rydberg constant, m0 is the free electron mass and εr is the relative dielectric constant. for more details please read;
Article Determination of the exciton binding energy and effective ma...
Dear Khursheed,
you cannot determine the binding energy from the dielectric constant.
The dielectric constant describes the screening of the electron-hole interaction. So higher this constant, so lower the binding energy.
With Regard
R. Mitdank
- Badges
- Science topic
- Similar topics
- Phytochemistry
- Extracts