Mg doping improves interfacial contact and endows low hysteresis high temperature processed SnO₂-based PSCs with a steady-state PCE of 14.55%.

In this letter, we report perovskite solar cells with thin dense Mg-doped TiO₂ as hole-blocking layers (HBLs), which outperform cells using TiO₂ HBLs in several ways: higher open-circuit voltage (V_oc) (1.08 V), power conversion efficiency (12.28%), short-circuit current, and fill factor. These properties improvements are attributed to the better properties of Mg-modulated TiO₂ as compared to TiO₂ such as better optical transmission properties, upshifted conduction band minimum (CBM) and downshifted valence band maximum (VBM), better hole-blocking effect, and higher electron life time. The higher-lying CBM due to the modulation with wider band gap MgO and the formation of magnesium oxide and magnesium hydroxides together resulted in an increment of V_oc. In addition, the Mg-modulated TiO₂ with lower VBM played a better role in the hole-blocking. The HBL with modulated band position provided better electron transport and hole blocking effects within the device.

Size-controlled synthesis and size-dependent antibacterial activity of Cu₂O nanoparticles with high efficiency for H₂O₂ evolution.

Cu₂O nanoparticles synthesized by using a fast and simplified method show superior photocatalytic activity towards methyl orange.