source:natureAll-inorganic lead-free perovskite-derivative metal halides are promising in optoelectronics. However, it remains challenging to realize efficient near-infrared (NIR) luminescence in these materials.A research group led by Prof. CHEN Xueyuan from Fujian Institute of Research on the Structure of Matter of the Chinese Academy of Sciences (CAS) developed novel near-ultraviolet (NUV) light-emitting diode (LED)-excitable NIR emitters based on efficient energy transfer from Te4+ to Ln3+ (Ln = Er, Nd, and Yb) in vacancy-ordered double perovskite Cs2ZrCl6 phosphors.The study was published...
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2022
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source:physIn collaboration with scientists from Jilin University in China, a group of Skoltech researchers led by Professor Artem R. Oganov discovered a unique compound—strontium hydride SrH22. It has the highest hydrogen content known so far and is stable at pressures of 80–140 gigapascals (about a million atmospheres). The compound obtained has mobile hydrogens, capable of transporting charge.The 'hunt' for polyhydrides—compounds with high hydrogen content—started in 2015, when a group of scientists from Germany experimentally proved that at a pressure of 150 gigapascals, sulfur hyd...
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source:eurekalertKortz is a pioneer in the research area of anionic metal-oxo clusters, a class of compounds also known as polyoxometalates (POMs). His research group discovered the subclass of polyoxopalladates (POPs) in 2008 and has continuously developed it further ever since. A large number of these structurally and functionally interesting compounds have since been published by his research group. These compounds are primarily anionic, meaning that they are negatively charged. Saurav Bhattacharya, an experienced researcher of Professor Kortz's work group, developed a series of neutral...
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source:azomLimitations of Conventional P-N Junction Solar CellsThe efficiency of traditional p-n junction solar cells is limited to 31% - 41% depending on the sunlight concentration. Moreover, expensive crystalline silicon modules are used for the production of p-n junction solar cells, which makes these PV materials economically unviable for power harvesting applications compared to other energy generation sources.Significance of Low Band Gap FE Materials for Solar Cell ApplicationsLow bandgap ferroelectric (FE) materials have gained significant attention from the scientific community due to ...
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2022
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