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Excitons and their Fine Structure in Lead Halide Perovskite Nanocrystals from Atomistic GW/BSE Calculations
Giulia Biffi, Yeongsu Cho, Roman Krahne +1
Atomistically detailed computational studies of nanocrystals, such as those derived from the promising lead-halide perovskites, are challenging due to the large number of atoms and…
Simulations of Trions and Biexcitons in Layered Hybrid Organic-Inorganic Lead Halide Perovskites
Yeongsu Cho, Samuel M. Greene, Timothy C. Berkelbach
Behaving like atomically-precise two-dimensional quantum wells with non-negligible dielectric contrast, the layered HOIPs have strong electronic interactions leading to tightly bou…
Thickness-dependent optical properties of layered hybrid organic-inorganic halide perovskites: A tight-binding GW-BSE study
Yeongsu Cho, Timothy C. Berkelbach
We present a many-body calculation of the band structure and optical spectrum of the layered hybrid organic-inorganic halide perovskites in the Ruddlesden-Popper phase with the gen…
Environmentally-Sensitive Theory of Electronic and Optical Transitions in Atomically-Thin Semiconductors
Yeongsu Cho, Timothy C. Berkelbach
We present an electrostatic theory of band gap renormalization in atomically-thin semiconductors that captures the strong sensitivity to the surrounding dielectric environment. In…