Interfacial band offset engineering with barium-doping towards enhanced performance of all inorganic CsPbIBr perovskite solar cells.

This study investigates the incorporation of Ba at a low concentration into CsPbIBr, resulting in the formation of mixed CsPbBaIBr perovskite films. Photovoltaic devices utilizing these Ba-doped CsPbIBr (Ba-CsPbIBr) perovskite films achieved a higher stabilized power conversion efficiency of 14.07% compared to 11.

Water-Triggered Chemical Transformation of Perovskite Nanocrystals.

Recently emerged lead-halide perovskite nanocrystals (PNCs) are promising optoelectronic material due to their easy solution processability, wide range of color tunability, as well as very high photoluminescence quantum yield. Despite their significant success in lab-scale optoelectronic applications, the long-term stability becomes the main issue, hindering them towards commercialization. The highly ionic nature of such lead-halide structure makes them extremely unstable in water and air.

Biosorption of Pb(II) by Bacillus badius AK strain originating from rotary drum compost of water hyacinth.

The presence of heavy metals in the environment due to industrial activities is of serious concern because of their toxic behaviour towards humans and other forms of life. Biosorption of Pb(II) using dry bacterial biomass of Bacillus badius AK, previously isolated from water hyacinth compost, has been undertaken in batch system. The optimum conditions of biosorption were determined by investigating the initial pH, contact time, initial biomass dosage at constant temperature of 40 °C, initial metal concentration of 100 mg/L and rotational speed of 150 rpm.