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Optical characterization of inorganic lead halide perovskites using ab-initio methods
 Matula, Radovan ; Špaček, Ondřej (oponent) ; Liška, Petr (vedoucí práce)
This thesis deals with lead halide perovskites (LHPs), a relatively new group of materials which have found much use in fields such as photovoltaics and optoelectronics. LHPs’ potential lies in their electronic structure and easily tunable band gap, which result in unique physical and functional properties. To study LHPs’ optical properties and electronic structure we employ density functional theory (DFT). The DFT method is an ab-initio method built upon minimization of electron density functional to find the ground state energy of a given system. The DFT method was employed along with the use of hybrid functionals to obtain the correct band structure and band gap of CsPbBr3 bulk. The theoretically obtained data were used in the effective mass model to compare with the photoluminescence emission peaks of individual CsPbBr3 nanocrystals to correctly assess the exciton energy levels based on the nanocrystals’ size, and shape.
Úplný záznam
Optical characterization of inorganic lead halide perovskites using ab-initio methods
 Matula, Radovan ; Špaček, Ondřej (oponent) ; Liška, Petr (vedoucí práce)
This thesis deals with lead halide perovskites (LHPs), a relatively new group of materials which have found much use in fields such as photovoltaics and optoelectronics. LHPs’ potential lies in their electronic structure and easily tunable band gap, which result in unique physical and functional properties. To study LHPs’ optical properties and electronic structure we employ density functional theory (DFT). The DFT method is an ab-initio method built upon minimization of electron density functional to find the ground state energy of a given system. The DFT method was employed along with the use of hybrid functionals to obtain the correct band structure and band gap of CsPbBr3 bulk. The theoretically obtained data were used in the effective mass model to compare with the photoluminescence emission peaks of individual CsPbBr3 nanocrystals to correctly assess the exciton energy levels based on the nanocrystals’ size, and shape.
Úplný záznam

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