Two-sided photo voltaic cells can acquire scattered mild to assemble extra vitality

A bifacial perovskite/silicon tandem prototype being field-tested at King Abdullah College of Science & Expertise in Saudi Arabia. The brand new expertise is the results of a collaboration that features U of T Engineering researchers. Credit score: Michele De Bastiani

To extend the efficiency of photo voltaic panels, a world collaboration—together with researchers from King Abdullah College of Science & Expertise (KAUST) and U of T Engineering—has created a bifacial, or two-sided, tandem photo voltaic cell, constructed by bringing collectively the perfect of the perovskite and silicon applied sciences.

Out within the subject, mild primarily comes instantly from the solar. Typical tandem photo voltaic cells can already convert this mild into electrical energy extra effectively in comparison with conventional silicon-only photo voltaic cells by absorbing further wavelengths of sunshine.

Now, the researchers have realized that much more vitality will be gathered utilizing a two-sided tandem configuration. Gentle mirrored and scattered from the bottom—known as “albedo”—will also be collected to considerably improve the present of a tandem photo voltaic cell.

The analysis, which was printed at this time within the journal Nature Power, outlines precisely how the group engineered the perovskite/silicon machine to exceed the at the moment accepted efficiency

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2021 Cadillac XT5 review: Ordinary but agreeable

The Cadillac XT5 is attractive… at least from this angle.

Craig Cole/Roadshow

The XT5 is Cadillac’s midsize luxury utility vehicle, a versatile and cushy hauler that competes with rivals like the Lexus RX 350 and Lincoln Nautilus. To keep pace with these foes, and others, the XT5 was mildly enhanced last year, gaining a new turbocharged base engine, some updated tech and mildly tweaked styling, changes that continue forward for 2021. But while the XT5 is pleasant enough to drive and has a neatly trimmed cabin, the whole package feels a bit middle of the road in a segment where excellence is expected.


  • Excellent infotainment system
  • Over-the-road refinement
  • Upscale interior

Don’t Like

  • Real-world fuel economy could be better
  • Sluggish climate controls
  • Frumpy proportions

This Sport-trim model features a fetching five-sided grille outlined in satin chrome and filled in with a black mesh texture. This prominent opening is flanked by LED headlamps, which are standard across the XT5 range. When viewed head-on, this vehicle is elegant, though, regrettably, the rest of its body is less attractive. If the XT5’s styling were one of the seven dwarves in Snow White, it’d be Dopey. The proportions seem off, which makes the

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IRS sent millions of stimulus checks to the wrong place. Here are more potential problems

Where’s your stimulus check? We can help identify some of the errors and problems.

Angela Lang/CNET

As of late last week, the IRS had sent about 80% of the second stimulus check money it’s authorized to deliver with this new round of payments. But because of an electronic-transfer glitch, not everyone who’s qualified for a check has received one yet. Millions of $600 stimulus payments the IRS issued through direct deposit were routed to incorrect or ineligible bank accounts, according to tax preparation firms like TurboTax and Jackson Hewitt. 

“Because of an IRS error, millions of payments were sent to the wrong accounts and some may not have received their stimulus payment,” Jackson Hewitt said in a statement last week. TurboTax confirmed the issue in a Facebook post, but on Monday said many payments are now going through to the correct accounts.

The IRS admitted the error, too, confirming there may be problems with electronic payments with the second checks: “Because of the speed at which the law required the IRS to issue the second round of Economic Impact Payments, some payments may have been sent to an account that may be closed or, is or no longer active,

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