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Lead halide perovskite nanocrystals (NCs) exhibit excellent optoelectronic performance, however, the broad application is limited by their poor stability. Herein, a strategy for stable core‐shell structured bismuth‐doped lead halide perovskite NCs is reported. The stable core‐shell perovskite NCs are prepared based on heterovalent substitutions and surface segregation effect. Core‐shell features are...
The further commercialization of renewable energy conversion and storage technologies requires heterogeneous electrocatalysts that meet the exacting durability target. Studies of the stability and degradation mechanisms of electrocatalysts are expected to provide important breakthroughs in stability issues. Accessible in situ/operando techniques performed under realistic reaction conditions are therefore...
Nowadays, nearly 48.7% near‐infrared (NIR) irradiation (>800 nm) of the full solar spectrum has actually not been fully utilized since the state‐of‐the‐art perovskite film usually can only absorb the most UV–vis sunlight radiation. Herein, high efficiency integrated Cs0.15FA0.85PbI3 perovskite/organic bulk (PC61BM:D18:Y6) heterojunction solar cells with enhanced low energy photon harvest until...
Organic–inorganic hybrid perovskite (OIHPs) solar cells are the most promising alternatives to traditional silicon solar cells, with a certified power conversion efficiency beyond 25%. However, the poor stability of OHIPs is one of the thorniest obstacles that hinder its commercial development. Among all the factors affecting stability, ion migration is prominent because it is unavoidable and intrinsic...
The internal design of DNA nanostructures defines how they behave in different environmental conditions, such as endonuclease‐rich or low‐Mg2+ solutions. Notably, the inter‐helical crossovers that form the core of such DNA objects have a major impact on their mechanical properties and stability. Importantly, crossover design can be used to optimize DNA nanostructures for target applications, especially...
Transparent electrodes (TEs) are pivotal components in many modern devices such as solar cells, light‐emitting diodes, touch screens, wearable electronic devices, smart windows, and transparent heaters. Recently, the high demand for flexibility and low cost in TEs requires a new class of transparent conductive materials (TCMs), serving as substitutes for the conventional indium tin oxide (ITO). So...
Metal‐Based Transparent Electrodes
In article number 2106006, Viet Huong Nguyen and co‐workers review recent progress and remaining challenges in metallic nanostructure‐based transparent electrodes (TEs), including oxide/metal/oxide multilayers, metal grids, metal nanowire/nanofiber/nanotrough percolating networks, metal meshes based on cracked templated, dealloyed ultrathin metallic films, and some...
The electroluminescence performance and long‐term stability of perovskite light‐emitting diodes (PeLEDs) are greatly affected by the film quality of perovskite emitting layer. Herein, the authors employ an ionic liquid, 1‐butyl‐3‐methylimidazolium trifluoromethanesulfonate ([BMIm]OTf), to manipulate the growth of quasi‐2D perovskite films by providing heterogeneous nucleation sites. The [BMIm]OTf...
The organic–inorganic halide perovskite solar cell (PerSC) is the state‐of‐the‐art emerging photovoltaic technology. However, the environmental water/moisture and temperature‐induced intrinsic degradation and phase transition of perovskite greatly retard the commercialization process. Herein, a dual‐functional organic ligand, 4,7‐bis((4‐vinylbenzyl)oxy)‐1,10‐phenanthroline (namely, C1), with crosslinkable...
Inverted perovskite solar cells (PSCs) have received widespread attention due to their facile fabrication and wide applications. However, their power conversion efficiency (PCE) is reported lower than that of regular PSCs because of the undesirable interfacial contact between perovskite and the hydrophobic hole transport layer (HTL). Here, an interface regulation strategy is proposed to overcome this...
Developing intrinsically stretchable organic solar cells (OSCs) with excellent mechanical robustness and long‐term operation stability is highly demanded for practical applications. Here, the representative PM6/Y6 active layer film, crosslinked by a photo‐crosslinkable small molecule 2,6‐bis(4‐azidobenzylidene)cyclohexanone (BAC) containing azide groups, exhibits a significantly enhanced stretchability...
Li‐Ion Batteries
Developing new oxide solid electrolytes with fast Li‐ion transport and high stability is an important step to realize high‐performance solid‐state Li‐ion batteries. In article number 2201094, Tao Gao, Zilong Tang, and co‐workers discover that confined water in quaternary Li–H–Ti–O solid electrolytes can enhance ionic conductivity. Meanwhile, strong covalent bonds between confined...
Developing new oxide solid electrolytes with fast Li‐ion transport and high stability is an important step to realize high‐performance solid‐state Li‐ion batteries. Hydrate materials containing confined water widely exist in nature or can be easily synthesized. However, they have seldom been explored as Li‐ion solid electrolytes due to the stereotype that the presence of water limits the electrochemical...
Developing highly active, durable, and cost‐effective electrocatalysts for the oxygen evolution reaction (OER) is of prime importance in proton exchange membrane (PEM) water electrolysis techniques. Ru‐based catalysts have high activities but always suffer from severe fading and dissolution issues, which cannot satisfy the stability demand of PEM. Herein, a series of iridium‐doped yttrium ruthenates...
Metal‐halide perovskites have drawn profuse attention during the past decade, owing to their excellent electrical and optical properties, facile synthesis, efficient energy conversion, and so on. Meanwhile, the development of information storage technologies and digital communications has fueled the demand for novel semiconductor materials. Low‐dimensional perovskites have offered a new force to propel...
Due to their marvelous electrical and optical properties, perovskite nanocrystals have reached remarkable landmarks in solar cells, light‐emitting diodes, and photodetectors. However, the intrinsic instability of ionic perovskites, which would undergo an undesirable phase transition and decompose rapidly in ambient humidity, limits their long‐term practical deployment. To address this challenge, halogenated...
Surface states are one of the crucial factors determining the phase stability of formamidinium‐based perovskites. Compared with other compositions, exclusive lattice strain in FAPbI3 perovskite generates defects at the surface more readily, making them more vulnerable at the surface and easier to trigger the phase transition from α‐phase to the non‐perovskite δ‐phase. In order to regulate the surface...
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