A study on structural, optical, and electrical characteristics of perovskite CsPbBr QD/2D-TiSe nanosheet based nanocomposites for optoelectronic applications.

Lead halide perovskite (CsPbBr) quantum dots (QDs) and two-dimensional (2D) layered transition metal dichalcogenides have a significant application in solution-processed optoelectronic devices. Here, we report the oleylamine-assisted exfoliation of TiSe nanosheets (NSs) in dichlorobenzene with high concentration and stable dispersion. The functionalized TiSe NSs were used to synthesize the solution-processed perovskite CsPbBr QD/TiSe NS-based nanocomposite.

A study on chemical exfoliation and structural and optical properties of two-dimensional layered titanium diselenide.

Titanium diselenide (TiSe) is the least studied member of the transition metal dichalcogenide family due to a lack of available synthesis methodology, controlled bandgap engineering, and rapid characterization of layers. In this paper, we report the chemical exfoliation of TiSe platelets synthesized by the chemical vapor transport route in ortho-dichlorobenzene (o-DCB) functionalized with oleylamine (OLA), for the first time to the best of our knowledge. It is found that the addition of OLA supports the formation of a stable dispersion of a large area of the TiSe sheets due to surface capping with the OLA molecules indicating the importance of the ligand in dispersion behavior.

Tuning the performance of vanadium redox flow batteries by modifying the structural defects of the carbon felt electrode.

Polyacrylonitrile (PAN)-based carbon felt was subjected to N-plasma treatment to increase the heteroatom defects and reactive edge sites as a method to increase the performance in vanadium redox flow batteries (VRFBs). N-doping in the felt was mainly in the form of pyrrolic and pyridinic nitrogen. Even though the amount of oxygen functional groups on the N-plasma-treated sample was very low, the felt showed enhanced electrochemical performance for both V/V as well as V/V redox reactions.

Neutron diffraction study of [H(4)Co(4)(C(5)Me(4)Et)(4)], a tetrahedral metal cluster complex with four face-bridging hydride ligands.

A single-crystal neutron diffraction analysis of the cluster complex [H(4)Co(4)(C(5)Me(4)Et)(4)] was carried out on the new quasi-Laue diffractometer VIVALDI at the Institut Laue-Langevin. The structure consists of four face-bridging hydrides attached to a tetrahedral cobalt metal core. Average distances and angles in the core of the molecule are as follows: Co-Co = 2.