Problem calculating SLA doped with Eu
Posted: Mon Oct 31, 2022 6:40 am
Hello Everyone,
I am trying to replicate a paper: First-principles study of the luminescence of Eu2+-doped phosphors by Jia et al.
The transition energies of SLA:Eu2+ were calculated.
The procedure is as follows:
1. structurally relax the matrix
2. create a supercell and determine the stable structure and the total energies of the ground and excited states
3. perform a single point calculation of the ground and excited states using the stable structure to determine the total energies
4. calculate the transition energies from the difference in total energies.
As a result, the transition energy shown in the paper is about 2 eV, whereas my calculation is much larger, about 8 eV. The plotted band diagram also differs significantly from the paper.
How can I interpret the cause of this?
Best regards.
I am trying to replicate a paper: First-principles study of the luminescence of Eu2+-doped phosphors by Jia et al.
The transition energies of SLA:Eu2+ were calculated.
The procedure is as follows:
1. structurally relax the matrix
2. create a supercell and determine the stable structure and the total energies of the ground and excited states
3. perform a single point calculation of the ground and excited states using the stable structure to determine the total energies
4. calculate the transition energies from the difference in total energies.
As a result, the transition energy shown in the paper is about 2 eV, whereas my calculation is much larger, about 8 eV. The plotted band diagram also differs significantly from the paper.
How can I interpret the cause of this?
Best regards.