Efficient luminescent solar cells based on tailored mixed-cation perovskites

We report on a new metal halide perovskite photovoltaic cell that exhibits both very high solar-to-electric power-conversion efficiency and intense electroluminescence. We produce the perovskite films in a single step from a solution containing a mixture of FAI, PbI2, MABr, and PbBr2 (where FA stands for formamidinium cations and MA stands for methylammonium cations). Using mesoporous TiO2 and Spiro-OMeTAD as electron- and hole-specific contacts, respectively, we fabricate perovskite solar cells that achieve a maximum power-conversion efficiency of 20.8% for a PbI2/FAI molar ratio of 1.05 in the precursor solution. Rietveld analysis of x-ray diffraction data reveals that the excess PbI2 content incorporated into such a film is about 3 weight percent. Time-resolved photoluminescence decay measurements show that the small excess of PbI2 suppresses nonradiative charge carrier recombination. This in turn augments the external electroluminescence quantum efficiency to values of about 0.5%, a record for perovskite photovoltaics approaching that of the best silicon solar cells. Correspondingly, the open-circuit photovoltage reaches 1.18 V under AM 1.5 sunlight. Metal halide perovskites...

Living gluten-free getting easier – Entertainment & Life – GoErie.com

It used to be impossible to have a normal life without gluten. You couldn’t go out to eat, bake, have pasta, bread, or many, many, processed foods. While that last part is still true — many are often stunned to find out how many processed foods contain wheat or its byproduct — choices, alternatives and general awareness have multiplied. We’ve come a long way from the days of tasteless soupy casseroles and having to make our own crackers. I have been through this, first when our son, now 14, had to go through an elimination diet due to an esophagus problem, and subsequently when my husband decided he felt a lot better when he ate like J.R. did over those nine months. Neither are celiacs, who have a serious allergy to gluten, which is the protein found in wheat. But they demonstrate what’s known as a “sensitivity” to it, meaning their guts prefer not to digest it. And after they’re off it for a while, they really don’t want to digest it. Surprises: We seriously could not believe some of the things we found that contained wheat (and therefore gluten) when we started down this road. That includes some restaurants’ chicken wings, candy such as Twizzlers, some brands of BBQ potato chi...

Neutron stars are not only the most dense objects in the Universe, but they rotate very

Neutron stars are not only the most dense objects in the Universe, but they rotate very fast and regularly. Until they don’t. googletag.cmd.push(function() { googletag.display(‘div-gpt-ad-1449240174198-2′); }); Occasionally these neutron stars start to spin faster, caused by portions of the inside of the star moving outwards. It’s called a “glitch” and it provides astronomers a brief insight into what lies within these mysterious objects. In a paper published today in the journal, Nature Astronomy, a team from Monash University, the ARC Centre of Excellence for Gravitational Wave Discovery (OzGrav), McGill University in Canada, and the University of Tasmania, studied the Vela Pulsar, a neutron star in the southern sky, that is 1,000 light years away. According to the paper’s first author, Dr. Greg Ashton, from the Monash School of Physics and Astronomy, and a member of OzGrav, Vela is famous—not only because only 5% of pulsars are known to glitch but also because Vela “glitches” about once every three years, making it a favourite of “glitch hunters” like Dr. Ashton and his colleague, Dr. Paul Lasky, also from Mon...

PARIS — De Grisogono has filed for bankruptcy after a months-long sales process failed to turn

PARIS — De Grisogono has filed for bankruptcy after a months-long sales process failed to turn up a buyer, according to a statement from the company Wednesday, a week after press reports linked the Switzerland-based luxury jeweler to the Luanda Leaks investigation of Isabel dos Santos, the daughter of Angola’s former president. “For several months, a sale process has been under way. Despite considerable headway, the transaction did not go through,” the jeweler said. “Without financial support of its current shareholders, and without a buyer, the solvency of the company is now under threat, thus making it impossible to continue activities,” it added. Pentant Necklace, Earring Blank, Rings Blank, Pendant Blank, Ear Back – LUO MI SI,https://www.luomisi.com/

Thank you for visiting nature.com. You are using a browser version with limited support for CSS.

Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript. Transparent and flexible electrodes are widely used on a variety of substrates such as plastics and glass. Yet, to date, transparent electrodes on a textile substrate have not been explored. The exceptional electrical, mechanical and optical properties of monolayer graphene make it highly attractive as a transparent electrode for applications in wearable electronics. Here, we report the transfer of monolayer graphene, grown by chemical vapor deposition on copper foil, to fibers commonly used by the textile industry. The graphene-coated fibers have a sheet resistance as low as ~1 kΩ per square, an equivalent value to the one obtained by the same transfer process onto a Si substrate, with a reduction of only 2.3 per cent in optical transparency while keeping high stability under mechanical stress. With this approach, we successfully achieved the first e...

Side Dish: Recipe for Hazelnut, Pear & Espresso Cake | Food/Restaurants

“Fruit and nuts have made happy partners for centuries, and this cake is no exception. The layered, thinly sliced pears sitting on top are so inviting and bring a gentle sweetness to the nutty, coffee cake. Hazelnuts, unlike most other nuts, can actually dry out a cake very quickly so I’ve simply folded them into the batter instead of grinding them down.” — Benjamina Ebuehi 1. Preheat the oven to 375 F. Grease the bottom and sides of a round 9-inch cake pan and line the bottom with parchment paper. 2. Toast the hazelnuts on a baking tray in the oven for 10 minutes, and then leave them to cool. Turn the oven down to 350 F. 3. In a mixing bowl, whisk together the eggs, sugar and vanilla until combined. Stir in the flour, baking powder and espresso powder and mix well before pouring in the butter and combining until smooth. 4. Peel, core and finely diced 2 pears and roughly chop three-quarters of the hazelnuts. Gently fold them into the batter and pour into the prepared pan. Cut the remaining 2 pears in half, with the skin left on, and use a teaspoon or melon baller to spoon out the cores. Slice them thinly and then place them on top of the cake, overlapping a few at a time. Sprink...

Welcome to our new and improved comments, which are for subscribers only. This is a test

Welcome to our new and improved comments, which are for subscribers only. This is a test to see whether we can improve the experience for you. You do not need a Facebook profile to participate. You will need to register before adding a comment. Typed comments will be lost if you are not logged in. Please be polite. It’s OK to disagree with someone’s ideas, but personal attacks, insults, threats, hate speech, advocating violence and other violations can result in a ban. If you see comments in violation of our community guidelines, please report them. Health inspectors typically make two annual inspections to commercial kitchens per year, including restaurants, food trucks, VFW posts and more. (Photo: MachineHeadz, Getty Images/iStockphoto) Oakland County Health Division in October inspected several dozen Novi establishments that serve food to the public and cited dozens for violating priority provisions of the Michigan Modified Food Code.  Priority items, such as correct cooling temperatures and proper food storage methods, help prevent food-borne illness. Priority violations are the most serious of Michigan Modified Food Code infractions. Hometown Life lists local e...

ExxonMobil Expands Beaumont Plant, Increases Capacity

ExxonMobil has begun construction on a new crude unit at its Beaumont, Texas, refinery that will increase capacity by more than 65 percent, or 250,000 barrels a day. “This project is part of ExxonMobil’s larger ‘Growing the Gulf’ initiative, a series of refining and chemical expansion projects across Texas and Louisiana,” said Emily Russell, ExxonMobil public and government affairs advisor. “Production growth in the Permian Basin in West Texas and New Mexico is driving the expansion project in Beaumont.” The project will create up to 1,850 construction jobs and between 40 and 60 permanent jobs upon completion, slated for 2022. ExxonMobil’s integrated operations in Beaumont include a 366,000 barrel-per-day capacity refinery, as well as chemical, lubricants and polyethylene plants. The facility has approximately 2,100 employees in the Beaumont area and its operations account for approximately one in every seven jobs in the region. The Beaumont refinery currently processes 366,000 barrels of crude oil per day and produces 2.8 billion gallons of gasoline annually, according to the ExxonMobil website. The Beaumont chemical plant produces buil...

Global Pharmaceutical Intermediates Market Insights 2019-2025 | Aceto, Eastar Chem, BASF, Midas Pharma, Arlife Sciences

The report offers a holistic view of Pharmaceutical Intermediates market through systematic segmentation that covers every aspect of the target market. The report projects revenue of XX USD in 2014 and 2026 with a CAGR of XX%. The Exploration study offers an in-depth assessment of the Pharmaceutical Intermediates Market and helps market sharers to gain a solid base in the industry. The primary objective of this report is to provide company officials, industry investors, and industry members with consequential insights to help the users to make reliable essential decisions regarding the opportunities for Pharmaceutical Intermediates market. To Comprehend The Complete Report Through TOC, Figures, and Tables, Get Free Sample Copy (Download PDF) @ https://www.apexmarketsresearch.com/report/global-pharmaceutical-intermediates-market-by-product-type-industrial-421045/#sample Explore Best Analytical Report on Pharmaceutical Intermediates Market Thriving Worldwide with Topmost Key Vendors like Aceto Eastar Chem BASF Midas Pharma Arlife Sciences Wintersun Chem Ganesh Group Lianhe Tech Dishman Group Codexis In addition to this, report pinpoints industrial dynamics and provides analysis of...

Free Software Foundation ‘demands’ Windows 7 be released as free software

The FSF has launched the “Upcycle Windows 7″ petition, and if the opening paragraph doesn’t persuade Microsoft to open source Windows 7, then I don’t know what will. “On January 14th, Windows 7 reached its official ‘end-of-life,’ bringing an end to its updates as well as its ten years of poisoning education, invading privacy, and threatening user security. The end of Windows 7′s lifecycle gives Microsoft the perfect opportunity to undo past wrongs, and to upcycle it instead,” the petition reads. Yikes. At any rate, most users probably agree that Windows 7 already undid Microsoft’s past wrongs, being absolved for the sins of Windows Vista. Hey, maybe the FSF should ask for Windows Vista instead. You know, shoot for the moon and land in the stars kind of thing. Something’s better than nothing. Moving on, the FSF has demanded that Microsoft release Windows 7 as free software for the community to “study and improve.” The petition goes on to cite a precedent for this in the form of Microsoft’s Calculator app being on GitHub, and claims Microsoft has “nothing to lose” by releasing an operat...

Scrape along the mark once using the tile scorer and a metal ruler to prevent it

Scrape along the mark once using the tile scorer and a metal ruler to prevent it from breaking in the wrong place. To snap the tile, place a pencil or felt tip under the line and apply downward pressure on either side. You could also place the tile on the edge of a workbench and press down. To tile around an obstacle, such as a toilet or pipe, you’ll need to create an accurate paper template. To do this, first cut a piece of paper or card the same size as your tile. In the area of the tile that will come into contact with the obstacle, cut a series of slits about 5-10mm apart that are slightly longer than the obstruction. Place the template into position with the cut slits against the obstruction, remembering to take into account a 5mm gap for grout. Remove the template from the obstacle, cut along the line and then check it fits exactly around the obstacle. Lay the template on the tile and mark along the irregular edge with a pencil or felt tip pen. Then scratch over the line using a tile scorer; this will help the tile cut cleanly. Tile nippers are used to cut curved or irregular lines. Use the steps above to create an accurate template of the obstacle you need to cut a...

Fence at Umstead would be “permanent eyesore,” says NC Parks to RDU Airport Authority

The proposed fence would abut parts of the Reedy Creek Multi-Use Trail, shown at the bottom of the map. Airport officials contend the fence is necessary to keep trespassers off nearby RDU property — land that has been leased to a quarry company for a controversial stone mine. (Map: NC Parks) The RDU Airport Authority today delayed a vote on an 8-foot high, 8.3-mile fence that would cut through parts of Umstead Park, after meeting with state parks officials who have serious reservations about the project. The Authority has proposed building the security fence, which would be topped with three rows of barbed wire. It would abut parts of the Reedy Creek Multi-Use Trail, bisecting it in two places. The trail  is used by tens of thousands of hikers, cyclists and equestrians every year. The fence’s purpose is to keep trespassers off airport property, which intersects with the park. Bill Sandifer, the Authority’s chief operating officer, told the board that the airport would be seeking a “compromise” to the fence. “There’s more conversation to be had,” Sandifer said. “We’re taking a short pause. But the fence isn’t going away. We have needs on that side of the airport.” However, the fe...

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