Variations in the optical properties of TiO2 with Pb doping using ab initio calculations

Titanium dioxide (TiO2) is one of the most promising photocatalysts for photoelectrochemical applications due to its high chemical as well as photochemical stability. Its efficiency in practical applications is limited due to its wide bandgap, a high rate of recombination of electron–hole pairs and the weak photo-carriers separation efficiency. In this computational study, a path was followed to find out the redshift of the TiO2 light absorption edge via lead (Pb) doping. The density functional theory (DFT) results revealed that the doped TiO2 bandgap was decreased to the lower edge (2.1 eV) in the visible region resulting in a relatively better optical absorption of the material. Furthermore, doped TiO2 was found to absorb a large part of the solar spectrum. The improvement in optical absorption resulted in good photo response. The calculated results also showed a redshift in optical properties produced through the doping of Pb in TiO2.

Effect of Growth Temperature on the Characteristics of CsPbI3-Quantum Dots Doped Perovskite Film

In this study, adding CsPbI3 quantum dots to organic perovskite methylamine lead triiodide (CH3NH3PbI3) to form a doped perovskite film filmed by different temperatures was found to effectively reduce the formation of unsaturated metal Pb. Doping a small amount of CsPbI3 quantum dots could enhance thermal stability and improve surface defects. The electron mobility of the doped film was 2.5 times higher than the pristine film. This was a major breakthrough for inorganic quantum dot doped organic perovskite thin films.

Enhanced thermoelectric performance of InTe through Pb doping

Chalcogenide semiconductors continue to be of prime interest for designing novel efficient materials for energy-conversion applications. Among them, the narrow-band-gap p-type semiconductor InTe exhibits high thermoelectric performance that mostly stems...

Experimental corroboration of the thermoelectric performance of Bi2PdO4 oxide and Pb-doped derivatives

Predicted thermoelectric behaviour in Bi2PdO4 is experimentally realized. Pb doping enhances the power factor, with additional reduction of thermal conductivity.