Static and Dynamic Disorder in Triple-Cation Hybrid Perovskites
arXiv:1808.00807 · doi:10.1021/acs.jpcc.8b05222
Abstract
A detailed understanding of the carrier dynamics and emission characteristics of organic-inorganic lead halide perovskites is critical for their optoelectronic and energy harvesting applications. In this work, we reveal the impact of the crystal lattice disorder on the photo-generated electron-hole pairs through low-temperature photoluminescence measurements. We provide strong evidence that the intrinsic disorder forms a sub-bandgap tail density of states, which determines the emission properties at low temperature. The PL spectra indicate that the disorder evolves with increasing temperature, changing its character from static to dynamic. This change is accompanied by a rapid drop of the PL efficiency, originating from the increased mobility of excitons/polarons, which enables them to reach deep non-radiative recombination centers more easily.
References in corpus (10)
- Direct Measurement of the Exciton Binding Energy and Effective Masses for Charge carriers in an Organic-Inorganic Tri-halide Perovskite
- Determination of the exciton binding energy and effective masses for the methylammonium and formamidinium lead tri-halide perovskite family
- Relativistic quasiparticle self-consistent electronic structure of hybrid halide perovskite photovoltaic absorbers
- Revealing the role of organic cations in hybrid halide perovskites CH3NH3PbI3
- Indirect to direct bandgap transition in methylammonium lead halide perovskite
- The impact of the halide cage on the electronic properties of fully inorganic caesium lead halide perovskites
- Rotational Dynamics of Organic Cations in CH3NH3PbI3 Perovskite
- Relativistic origin of slow electron-hole recombination in hybrid halide perovskite solar cells
- Unraveling the exciton binding energy and the dielectric constant in single crystal methylammonium lead tri-iodide perovskite
- Spatially resolved studies of the phases and morphology of methylammonium and formamidinium lead tri-halide perovskites
Cited by in corpus (3)
- Modelization of charge carriers mobilities in halide perovskites: Fröhlich scattering and quantum localization effects in a dynamic disorder regime
- Dynamics of Two Distinct Exciton Populations in Methyl-functionalized Germanane
- Local energy landscape drives long exciton diffusion in 2D halide perovskite semiconductors