Perovskite solar cells can be made in the open air rather than in an inert atmosphere, according to an international research team. Working with p–i–n perovskite solar cells, they added dimethylammonium formate to the perovskite precursors to inhibit the oxidization of iodide ions and deprotonation of organic cations. The cells achieved nearly 25% efficiency (1.53eV cell), and retained 90% of ...
Oxford PV is claiming an efficiency record for solar panels based on perovskite-on-silicon tandem photovoltaic cells. “Produced in collaboration with the Fraunhofer Institute for Solar Energy Systems, the panel achieved a record 25% conversion efficiency, a significant increase on the more typical 24% efficiency of commercial modules,” according to the company. The panel was made using equipment and expertise at ...
Belgian research lab Imec is claiming to have created a metal halide perovskite LED stack that emits 1,000x more light “than state-of-the-art OLEDs”, it said. With the assistance of an external laser, the same stack exhibited the electrically-pumped amplified spontaneous emission that would be necessary in a laser. The “result is a milestone towards a perovskite injection laser, promising applications ...
Inorganic perovskite materials are easy to prepare and process, and are suitable for making lasers, according to research at Pusan National University. The perovskite of interest is CsPbBr3, which had to be formed into ‘nano-sheets’ within a particular structure, invented by the Pusan team, to achieve sufficient gain for lasing. Update: Imec announced electrical pumping of a perovskite LED Not ...
Solar cells tend to work better with an anti-reflection coating, and perovskite solar cells are no exception. Planar magnesium fluoride anti-reflection coatings work on perovskite cells, but could the nano-scale surface texturing used on some silicon cells be applied to pervoskite cells? This was the question asked at the University of Warsaw, which worked with the Fraunhofer Institute for Solar ...
A cubic perovskite α-formamidinium lead iodide known as ‘α-FAPbI3‘ would be a promising solar cell material if it did not gradually turn into useless δ-FAPbI3 at room temperature under the influence of, of all things, light. Water has the same effect. “Solar cells made of α-FAPbI3 exhibit a 25.8% conversion efficiency and an energy gap of 1.48eV, specifications that are ...
Swedish thin film solar cell company Midsummer has demonstrated a tandem thin-film solar cell that hits 24.9% efficiency. Midsummer makes CIGS (copper indium gallium selenide) solar cells, and it collaborated with University of California, Los Angeles and Pioneer Materials to stack a perovskite cell on top of one of its products to make the tandem cell – with the wide-bandgap ...
Eindhoven University of Technology has made a photodiode with such low noise (<10-6mA/cm2 dark current) and wide dynamic range (<150dB), that it can optically detect a heartbeat at a distance of 1.3m. TU Eindhoven researcher Riccardo Ollearo having the pulse in his finger measured remotely by thin-film photodiode Through an unexpected photo-multiplier effect, it can achieve a photo-electron yield above ...
Perovskite materials show much promise in solar cells as they are as efficient as silicon, but are deposited as thin films that can be coated on glass. However, their lifetime is nothing like as good as silicon, and many research projects are under way to increase durability. This week, the University of Toledo has reported on a project that passivated ...
Two advances that increase the life of perovskite cells were published in Science this week, both involving Ecole Polytechnique Fédérale de Lausanne (EPFL) and its solar cell guru Michael Grätzel (pictured). One of them was the discovery that promoting (111) crystal facets at the surface of perovskite thin films makes them more stable in the face of heat, light and ...
Electronics Weekly Electronics Design & Components Tech News
