Publications by authors named "Khasim Saheb Bayikadi"
Article Synopsis
- CsPbBr and CsPbCl perovskites show potential for solar cells and radiation detection due to their stability and unique phase transition behavior.
- CsPbBrCl crystals demonstrate a monoclinic structure with a larger unit cell volume than previously thought, with a transition temperature around 37 °C.
- High-quality CsPbBrCl single crystals were used to make γ-ray detectors with a 7.2% energy resolution, indicating low defect densities and promising performance in detecting high-energy radiation.
Atomically dispersed iron sites on nitrogen-doped carbon (Fe-NC) are the most active Pt-group-metal-free catalysts for oxygen reduction reaction (ORR). However, due to oxidative corrosion and the Fenton reaction, Fe-NC catalysts are insufficiently active and stable. Herein, w e demonstrated that the axial Cl-modified Fe-NC (Cl-Fe-NC) electrocatalyst is active and stable for the ORR in acidic conditions with high H O tolerance.
View Article and Find Full Text PDFThe perovskite compound CsPbBr has recently been discovered as a promising room-temperature semiconductor radiation detector, offering an inexpensive and easy-to-manufacture alternative to the current benchmark material Cd Zn Te (CZT). The performance of CsPbBr sensors is evaluated under harsh conditions, such as high radiation doses often found in industrial settings and extreme radiation in space. Results show minimal degradation in detector performance after exposure to 1 Mrad of Co-60 gamma radiation, with no significant change to energy resolution or hole mobility and lifetime.
View Article and Find Full Text PDFArticle Synopsis
- Making efficient semiconductor radiation detectors at room temperature depends on how electrodes are created and arranged.
- Laser scribing, commonly used for perovskite solar cells, is a promising, cost-effective technique for this purpose, but its effectiveness for radiation detectors had not been thoroughly explored.
- Experiments using laser scribing on perovskite CsPbBr detectors showed minimal leakage current and impressive energy resolution in gamma-ray energy peaks, indicating its potential; however, further optimization is needed for narrower pixel gaps.
Article Synopsis
- Researchers successfully grew high-quality single crystals of SrMnTeO (SMTO) using a self-flux method, enabling detailed study of its properties.
- Techniques like neutron powder diffraction and single-crystal X-ray diffraction confirmed the structure, revealing distinct positions for manganese and tellurium, as well as minor defects.
- The study found a weak antiferromagnetic order at 6.6 K and indicated antiferromagnetic interactions between Mn ions, establishing SMTO as a noncentrosymmetric triangular antiferromagnet.
Photoconductivity, a crucial property, determines the potential of semiconductor materials for use in optoelectronic and photocatalytic device applications. The one-dimensional metal-organic nanotube semiconducting material [{Re(CO)}(bho)(phpy)] (MBT , where bho is benzene-1,2,3,4,5,6-hexaoate and phpy is 4-phenylpyridine) reported herein exhibits record photocurrent responses at a broad spectral range. MBT is comprised of a unique nanotube structure that is composed of six rhenium sites, six 4-phenylpyridine ligands, and a benzene-1,2,3,4,5,6-hexaoate unit.
View Article and Find Full Text PDFDeveloping a non-precious metal electrocatalyst for the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) is desirable for low-cost energy conversion devices. Herein, we designed and developed a new class of layered cation ordered single perovskite oxides (Pr0.9Ca0.
View Article and Find Full Text PDFSolvent-dependent magnetism in Cu-based metal-organic frameworks (MOFs) is reported. Spin-flop magnetic behaviour occurs at different dehydrated states of MOFs. The oxygens of guest and coordinated water molecules are responsible as water removal tunes the coordination geometry around the Cu centre and the electronic structure of the framework.
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