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- W3210253446 abstract "Organic-inorganic metal halide perovskites (HaPs) are intensively studied for their light-harvesting properties. Owing to the interplay between strong electron-electron interaction and spin-orbit coupling (SOC), their quantitative theoretical description is still a challenge as evidenced by the wide variety of results available in literature. Here, various methodologies for computing their electronic structure are evaluated, also accounting for SOC. More specific, the GW approach as well as variants of the hybrid functionals PBE0 and HSE are at the center of our investigations. For both functionals, we explore methods to determine the mixing parameter $alpha$, and for HSE, we investigate the impact of the screening-parameter $omega$. An extensive investigation of PbI2, a precursor of many HaPs, leads to the conclusion that hybrid functionals with $alpha$ tuned by the density-based mixing method are most suitable for obtaining band gaps comparable to $G_0W_0$ results. Moreover, this methodology is transferable to CsPbI3, and the same behaviour is expected for the entire family of lead-iodine perovskites." @default.
- W3210253446 created "2021-11-08" @default.
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- W3210253446 date "2021-10-31" @default.
- W3210253446 modified "2023-09-27" @default.
- W3210253446 title "Electronic structure of (organic-)inorganic metal halide perovskites: the dilemma of choosing the right functional" @default.
- W3210253446 hasPublicationYear "2021" @default.
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