Michael Kulbak

TL;DR: It is shown that an all-inorganic version of the lead bromide perovskite material works equally well as the organic one, in particular generating the high open circuit voltages that are an important feature of these cells.

TL;DR: In this paper, a direct comparison between perovskite-structured hybrid organic-inorganic methylammonium lead bromide (MAPbBr3) and cesium-lead bromides (CsPbB3) was performed over mesoporous titania scaffolds.

TL;DR: Analysis shows that Cs-based devices are as efficient as, and more stable than methylammonium-based ones, after aging, as well as under constant illumination, and under electron beam irradiation.

TL;DR: P-doping an organic hole transport material with a deep HOMO level and wide band gap to reduce recombination increased the cell's VOC to 1.5 V, a 0.2 V increase from earlier results with the pristine Br analogue with an identical band gap, and the current density increased from ∼1 to ∼4 mA/cm(2).

TL;DR: Valence and conduction band densities of states measured via ultraviolet and inverse photoemission spectroscopies on three metal halide perovskites are reported, revealing an unusually low DOS at the valence band maximum (VBM) of these compounds, which confirms and generalizes previous predictions of strong band dispersion and low DOS in these compounds.