Piers R. F. Barnes

TL;DR: The results of this combined computational and experimental study suggest that hybrid halide perovskites are mixed ionic–electronic conductors, a finding that has major implications for solar cell device architectures.

TL;DR: The recovery of a deep ice core from Dome C, Antarctica, that provides a climate record for the past 740,000 years is reported, suggesting that without human intervention, a climate similar to the present one would extend well into the future.

TL;DR: In this paper, it was shown that hydrated crystal phases are formed when methylammonium lead iodide perovskite (MAPI) is exposed to water vapor at room temperature and these phase changes are fully reversed when the material is subsequently dried.

TL;DR: In this paper, the influence of the choice of light source on measured photoconversion efficiencies for semiconductor photoelectrodes is examined, and it is concluded that reliable estimation of efficiency under standard conditions is best obtained by measuring the incident photon conversion efficiency (IPCE) as a function of wavelength, and integrating over the AM15 solar spectrum, or by measuring under sunlight with a similar zenith angle to that of the AM 15 spectrum.

TL;DR: Transient optoelectronic measurements combined with device simulations indicate that electric-field screening, consistent with ion migration, is similar in both high and low hysteresis CH3NH3PbI3 cells.