A combination of transient spectroscopy techniques provides an estimate of the time-resolved effective carrier mass and carrier-phonon coupling constant in a photovoltaic absorber, here applied to lead-halide perovskites.

A theoretical study of bio-inspired ring systems demonstrates optical ratcheting as a means to enhance efficiencies of solar energy harvesting devices.

Unexpected experimental and computational evidence of spontaneous lithium overintercalation challenges the currently accepted upper capacity limit of graphite battery anodes.

Carrier diffusion length is not a reliable indicator of performance in some halide perovskite solar cells; instead, experiments and modeling show that properties of the carrier transport layers limit the performance.

An experimental study reveals that the same oxidized O${}^{2-}$ species appear in conventional layered cathodes as in oxygen-redox-active alkali-excess cathodes.

Energy conversion efficiency limits for the bulk photovoltaic effect, a mechanism for conversion of light into electricity in solids, are formulated and are more stringent than the Shockley Queisser limit.

A simple theory is developed to understand the underlying physical principles of competitive ionic aggregation and solvation for electrolytes in lithium-ion batteries.

A systematic first-principles study shows that the iodine vacancy does not lead to strong nonradiative losses in halide perovskites as commonly believed; thus, performance optimization strategies for perovskite solar cells should focus on other defects.

A machine-learning model is developed and used to predict the performance of individual wind turbines in wind farms; the strategy leads to an accurate, lightweight, and generalizable data-driven model for wind-farm power prediction.