A mechanistic framework for hot carrier cooling process in CsPbBr3 PNC is depicted via transient absorption spectroscopy.

Summary Within first principles calculations, the electronic structure, thermodynamic, mechanical stability, magnetism, and phonon properties of the inverse perovskite (Na3OCl) have been summed up. The Birch‐Murnaghan derived lattice constant and bond‐lengths are identical, when compared to the experimental data. A direct energy gap of 2.18 eV observed from the band structure reveals the semiconducting nature of the present oxide. Also, the application of strain on electronic properties predicts the decrease in bandgap with respect to compressive strain and vice versa. The constituent nonmagnetic atoms in its crystal propose the total magnetic moment to be zero and the same is supported by susceptibility data. In addition to the negative Cauchy's pressure, the small bulk modulus compared to Young's modulus determined from elastic constants, possibly claims it as a brittle material. Also, the temperature dependent Gruneisen parameter (1.58) and Debye temperature (382.27 K) are determined to reveal the lattice thermal conductivity (κ = 6.48 W/mK) at room temperature.

Nanomaterials-based sensors are in demand for early-stage disease detection as a diagnostic tool. Here, we prepare a non-enzymatic electrochemical sensor using hydrothermally synthesized nano-berries shaped cobalt oxide (Co3O4) nanostructures on...

In this paper, we report the synthesis of zinc indium sulfide (ZnIn 2 S 4 ) microspheres synthesized via a low-temperature route, and the as-synthesized material was used for photocatalytic degradation of malachite green (MG), methyl orange (MO), and Direct Red 80 (DR-80) dyes. The as-synthesized material was characterized by powder X-ray diffraction and field-emission scanning electron microscopy for studying the crystal structure and surface morphology, respectively. Fourier transform infrared spectroscopy was performed to determine the functional groups attached. UV–Visible absorption spectrometry was done for light absorbance and band gap analysis, and Mott–Schottky analysis was performed to determine the nature and flat band potential of the material. A scavenger study was performed to analyze the active species taking part in the degradation process. The reusability of the material was tested up to four cycles to check the reduction in efficiency after each cycle. A time-correlated single-photon counting study was performed to observe the average lifetime of generated excitons during photocatalysis. It was found that the as-synthesized porous sample is more efficient in degrading the cationic dye than anionic dyes, which is further explained in the article.

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Graphitic carbon nitride, (g-CN/g-C3N4), an oldest material, was extensively used as photocatalyst due to high charge separation and transportation property, tunable band gap, and non-toxicity. Recently, g-CN has been utilized as an electron transport layer, interfacial buffer layer, and for passivation of perovskite layers in solar cell devices. Power conversion efficiency of g-CN-based solar cells has gone beyond 22.13% with device stability of more than 1500 h in dark. Additionally, the enhanced environmental stability of solar cell devices is due to the unique packed two-dimensional (2D) structure of g-CN, which provides protection to the devices against environmental degradation. However, availability of the limited synthesis methods and g-CN thin film formation with varying properties and high surface area, are two major concerns which needs to be further improved. This review covers the different methods of g-CN nanostructure synthesis, thin film formation, and their application in photovoltaic (PV) devices. The potential challenges and perspective of g-CN nanomaterials for solar cells are also included in this review.