Showing Spotlights 9 - 16 of 71 in category All (newest first):
Due to their fascinating optoelectronic properties, halide perovskites have attracted tremendous research interest as promising materials for photovoltaics, photodetectors, LEDs, and lasers. Researchers report report a strategy to synthesize perovskite nanocrystals using diblock copolymer micelles as a growth template. This work constitutes a new approach for synthesizing perovskite nanocrystals of controllable size and composition with vastly improved resistance to halide ion migration and environmentally induced degradation.
Aug 7th, 2019
Over the past ten years, paper has emerged as a focus area for researchers developing innovative techniques for printed basic electronics components. The goal of this research is to replace plastic substrates with low-cost, versatile and sustainable materials. The main advantages of investing in paper for electronics and energy storage devices are the low cost of the technology; the potentiality to recover device components and recycle the substrate as well as the active materials; and the production of environmentally harmless and biocompatible devices.
Feb 7th, 2019
Due to their excellent electron-transport properties and extremely high carrier mobility, graphene and other other direct bandgap monolayer materials such as transition-metal dichalcogenides (TMDCs) and black phosphorus show great potential to be used for low-cost, flexible, and highly efficient photovoltaic devices. A recent review provides a comprehensive overview on the current state-of-the-art of 2D-materials-based solar photovoltaics. It describes the recent progress made with graphene, graphene-based materials, and other 2D materials for solar photovoltaics, including silicon-based solar cells, and organic and perovskite solar cells.
Jan 7th, 2019
In the past few years, monolayer and multilayer silicenes have been successfully grown on various metal substrates. Unfortunately, silicene on metal substrate generally exhibits metallic or semi-metallic character without a bandgap, and thus cannot be used as adsorption layer of photovoltaic materials. A new comprehensive investigation of multilayer silicene by means of ab initio swarm-intelligence structure-searching method predicts that tri-layer silicene is an ideal candidate for high-efficiency photovoltaic absorbers.
Oct 15th, 2018
Steam is important for desalination, hygiene systems, and sterilization; and in remote areas where the sun is the only source of energy, being able to generate steam with solar energy could be very useful. Researchers now have found that the mushroom structure can surprisingly benefit solar steam generation. The stipe of the mushroom can serve as efficient water supply path, meanwhile, due to the extreme small ratio of the areas of fibrous stipe and black pileus, only little heat (useless heat loss) conducted into water.
Jun 6th, 2017
The growing need for 'green' energy sources combined with silicon solar cells' stagnating power conversion efficiencies have lead to a keen search for an alternative to silicon that would bring about a major change. Perovskite solar cell technology, boasting potential for high efficiency, low-cost scalable photovoltaic solar cells, may just be a suitable contender in this race. Perovskites, a class of materials that share a similar structure, display a myriad of exciting properties that position them as attractive candidates for enabling low-cost, efficient photovoltaics that could even be sprayed onto rooftops and various other surfaces.
Dec 1st, 2016
Scientists have now demonstrated in detail how chemical purity of perovskite precursors can affect the morphology of thin-film perovskite layers. While most studies concentrate on the exploration of processing conditions, the research team has investigated the purity levels of common perovskite precursor solutions and found a number of impurities that are critically important toward controlling the crystallization of perovskites. They observed that impurities that formed during the preparation of perovskite precursor solutions initiate formation of PbHPO3 nanoparticles, which helps to growth larger perovskite crystal grains resulting in higher solar cells efficiency.
Nov 15th, 2016
Solar cells absorb incoming sunlight and convert a part of photon energy into electricity. The remainder of photon energy is dissipated as heat. Although the idea is rather counter-intuitive, 'reverse solar cell' systems can also generate electric power by emitting rather than absorbing photons. Such systems - known as thermoradiative cells - generate voltage and electric power via non-equilibrium thermal radiation of infrared photons. Thermoradiative cells offer an opportunity to generate clean energy by harvesting radiation from largely untapped terrestrial thermal emission sources, potentially including the Earth itself.
Oct 14th, 2016