Origin of long lifetime of band-edge charge carriers in organic-inorganic lead iodide perovskites.

Supporting Information for Origin of Long Lifetime of Band-Edge Charge Carriers in Organic-Inorganic Lead Iodide Perovskites

Vapour-Deposited Cesium Lead Iodide Perovskites: Microsecond Charge Carrier Lifetimes and Enhanced Photovoltaic Performance

Metal halide perovskites such as methylammonium lead iodide (MAPbI3) are highly promising materials for photovoltaics. However, the relationship between the organic nature of the cation and the optoelectronic quality remains debated. In this work, we investigate the optoelectronic properties of fully inorganic vapour-deposited and spin-coated black-phase CsPbI3 thin films. Using the time-resolv...

Are Mobilities in Hybrid Organic-Inorganic Halide Perovskites Actually "High"?

The outstanding performance of hybrid organic-inorganic perovskites (HOIPs) in photovoltaic devices is made possible by, among other things, outstanding semiconducting properties: long real charge-carrier diffusion lengths, L, of up to 5 and possibly even 10 μm, as well as a lifetime, τ of ~1 μs or more in single crystal and polycrystalline films. 1–9 Top electronic transport materials will hav...

Are Mobilities in Hybrid Organic−Inorganic Halide Perovskites

Actually “High”? T outstanding performance of hybrid organic−inorganic perovskites (HOIPs) in photovoltaic (PV) devices is made possible by, among other things, outstanding semiconducting properties: long real charge carrier diffusion lengths, L, of up to 5 and possibly even 10 μm, as well as a lifetime τ of ∼1 μs or more in single-crystal and polycrystalline films. Top electronic transport mat...

Localized holes and delocalized electrons in photoexcited inorganic perovskites: Watching each atomic actor by picosecond X-ray absorption spectroscopy

We report on an element-selective study of the fate of charge carriers in photoexcited inorganic CsPbBr3 and CsPb(ClBr)3 perovskite nanocrystals in toluene solutions using time-resolved X-ray absorption spectroscopy with 80 ps time resolution. Probing the Br K-edge, the Pb L3-edge, and the Cs L2-edge, we find that holes in the valence band are localized at Br atoms, forming small polarons, whil...