No abstract

Ceria nanocrystals with a cube shape were synthesized from the hydrolytic sol–gel reaction of cerium salt in the presence of oleylamine. The overall synthetic process is very simple and readily applicable to the large‐scale synthesis of tens of grams of product in a single reaction in air. These ceria nanocrystals are readily dispersible in aqueous media without the addition of any extra dispersing agent. The aqueous dispersion of the ceria nanocrystals was successfully used as a chemical mechanical polishing slurry, and it exhibited high removal selectivity between silicon oxide and silicon nitride at pH 7.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)

Hot-electron-based photovoltaics has great potential to overcome the limitations of semiconductor-based photovoltaics. However, hot-electron applications still suffer from low quantum efficiency, associated with inefficient hot-electron collection and a poor absorption coefficient. Here, we demonstrate that hot-electron flow on a plasmonic Ag nanodiode is highly enhanced by depositing a MAPbI3 thin film. Femtosecond transient absorption spectra reveal the hot-electron dynamics, where the hot electrons from MAPbI3 denote significantly prolonged relaxation time over those from Ag, which can facilitate the internal photoemission process. By comparing the unraveled dynamics of MAPbI3 on plasmonic Ag to those on a plasmonic Au structure, we found that the former combination exhibits enhanced hot-electron transfer, which is correlated to higher hot-electron flow. We believe that the suggested structure in this work can provide a useful alternative model to design sensitive hot-electron-based photovoltaics.

On page C831, Fig. 10 should have appeared as below. Figure 10. Inline SEM images ͑a͒ BTA and ͑b͒ ATRA.