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Stepwise photoassisted decomposition of carbohydrates to H2

Biomass photoreforming is an advanced way of providing sustainable H2, whereas a maximized H2 yield relies on high extent of C–C bond breaking. Here, relying on a “C–C bond first” strategy that C–C bonds of carbohydrates are broken first over Ta-CeO2, carbohydrates are converted to C1 liquid hydrogen carriers (LHCs, consisting of HCOOH and HCHO), which...

Future demand for electricity generation materials under different climate mitigation scenarios

How many tons of steel, copper, silver, rare earth metals, and other materials are needed to build power generation facilities over the next 30 years? This study estimated future global material needs for electricity-producing infrastructure across a wide range of scenarios. While wind and solar energy require materials in high quantities, we find these...

Toward commercialization with lightweight, flexible perovskite solar cells for residential photovoltaics

Long-term stability concerns are a barrier for the market entry of perovskite solar cells. Here, we show that the technological advantages of flexible, lightweight perovskite solar cells, compared with silicon, allow for lowering the needed lifetime. The flexibility and lower weight especially allow for saving costs during the installation of residential...

In situ crosslinking-assisted perovskite grain growth for mechanically robust flexible perovskite solar cells with 23.4% efficiency

We proposed an in situ crosslinking strategy and carefully designed a functional monomer for tuning the perovskite growth on plastic substrates. The resultant flexible perovskite films have high crystalline quality and low Young’s modulus. The resultant flexible pero-SCs with active areas of 0.062 and 1.004 cm2 achieved record PCEs of 23.4% (certified...

Interfacial α-FAPbI3 phase stabilization by reducing oxygen vacancies in SnO2−x

Lee and co-workers report adverse effects at FAPbI3/SnO2−x (SnO2 with oxygen vacancies) from a crystallographic aspect. The absence of oxygen atoms at the interface induces formation of iodine interstitials that initiate α-FAPbI3 degradation. Also, the absence of oxygen atoms loosely bound organic cations in the lattice, which led to poor operational...

18.2%-efficient ternary all-polymer organic solar cells with improved stability enabled by a chlorinated guest polymer acceptor

A narrow-band-gap chlorinated polymer acceptor PY-2Cl was designed and synthesized, which exhibited near-infrared absorption and high molecular crystallinity. PY-2Cl as the third component was introduced into the PM6:PY-1S1Se host system for extending the absorption spectrum, modulating the phase separation, and strengthening the molecular ordering....

Design of workflows for crosstalk detection and lifetime deviation onset in Li-ion batteries

Increasing battery lifetime requires a fine understanding of crosstalking degradation mechanisms to prevent misleading conclusions. Here, Meunier et al. introduces dedicated analysis workflows to help the battery community to pinpoint the origins of crosstalk and rapidly screen novel electrolytes or electrode materials.

Cooperative passivation of perovskite solar cells by alkyldimethylammonium halide amphiphiles

Passivating perovskites is a key strategy for improving their performance. Dimethylammonium iodide (DMOAI) and fluoride (DMOAF) are shown to be excellent passivators, outperforming octylammonium iodide. Combined bulk and interface passivation yields efficiencies of 24.9% and 21.2% for FAPbI3- and FA0.65MA0.35Pb(I0.65Br0.35)3-based solar cells, respectively,...

Behavioral science can aid household participation in gas savings

Following Russia’s attack on Ukraine, gas demand in Europe and beyond must fall quickly for economic and political reasons. The behavioral sciences, when including transdisciplinary and experimental methods, can substantially aid this savings effort. Behavioral science, we argue, can support the promotion of urgently needed household participation....

Coupling of multiscale imaging analysis and computational modeling for understanding thick cathode degradation mechanisms

The understanding of lithium-ion batteries requires imaging capabilities able to provide information at a fine resolution over statistically relevant volume. With plasma focused ion beam-scanning electron microscopy (PFIB-SEM), the whole electrode can be resolved in 3D with a resolution of few nm. Here, this technology is applied to a thick positive...

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