Tech
Defect passivation strategy sets new performance benchmark for Sb₂S₃ solar cells
A research team led by Profs. Wang Mingtai and Chen Chong from the Hefei Institutes of Physical Science of the Chinese Academy of Sciences has developed an antimony trisulfide (Sb₂S₃) solar cell with a record conversion efficiency of 8.21%. This achievement marks the highest performance ever reported for this type of solar cell.
The study was published in Advanced Energy Materials.
Sb₂S₃ has drawn increasing attention as a promising light-absorbing material due to its abundance, non-toxicity, and favorable optoelectronic properties. However, devices fabricated via solution methods typically suffer from high defect densities and interface mismatches, which limit carrier transport and restrict photovoltaic conversion efficiencies to around 6–7%.
To overcome these challenges, the researchers proposed a full-dimensional defect passivation approach using the permeation effect of degradable phenethylammonium iodide (PEAI) in amorphous Sb₂S₃ films.
PEAI pretreatment of amorphous Sb₂S₃ films enables [hk1]-oriented crystallization, full-dimensional defect passivation (bulk and interfaces), and dual-interface energy-level reconstruction via Cd-I and Sb-I bonding. The PEAI reduces CdS surface energy and preferentially adsorbs on Sb₂S₃ (211) planes, promoting [hk1] orientation and enhancing carrier transport.
Furthermore, the penetrated PEAI increases the carrier lifetime by a factor of 3.7, verifying effective defect suppression.
As a result, the researchers successfully fabricated an Sb₂S₃ bulk heterojunction solar cell with a conversion efficiency of 8.21%, the highest reported to date.
This work sets a new performance benchmark for Sb₂S₃ solar cells and provides valuable insights for the design of next-generation, high-efficiency thin-film solar cells.
More information:
Yang Wang et al, Full‐Dimensional Penetration Strategy with Degradable PEAI Enables 8.21% Efficiency in Bulk Heterojunction Sb2S3 Solar Cells, Advanced Energy Materials (2025). DOI: 10.1002/aenm.202502805
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Defect passivation strategy sets new performance benchmark for Sb₂S₃ solar cells (2025, October 24)
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Tech
Why electricity costs so much in the UK (it’s not all about the weather)
The UK government is reportedly considering abandoning its goal of removing fossil fuels from the country’s electricity supply by 2030 in an attempt to keep energy bills down.
This is understandable given that the UK is already one of the most expensive places in Europe to use electricity, something that—despite plenty of investment in relatively cheap renewable energy—is unlikely to change any time soon. In fact, bills remain high even when wind farms are spinning at full capacity.
However, neither a drive to decarbonize the grid—which is needed for other reasons—nor abandoning this target is going to make energy significantly cheaper. The reason for this lies in how electricity markets work, and in the geography and policies that shape the UK’s energy system.
To begin with, wholesale electricity prices are determined in a way that essentially means that everyone has to pay for the most expensive source of electricity used at a given time, which in the UK is mostly gas power plants.
The gas which is burned to power the UK’s lights and kettles has to be liquefied, shipped from the US or Qatar amid global bidding wars, and then converted back into its original state. High gas prices drive high wholesale prices, which directly translate into high electricity bills.
Cheaper renewable energy sources (the cost of producing solar, wind or nuclear electricity is very low) have little effect. This is partly because while the operating cost of renewable electricity is very low, the cost of setting it up is not.
To encourage companies to build new generation capacity, the government must offer them a guaranteed price for the electricity they produce, to compensate for their costs. For a wind farm, this would include money for planning applications, as well as buying and installing turbines and electrical equipment.
Bringing different sources of electricity to consumers also requires expensive infrastructure investment. In the UK, for example, grid capacity is not where it needs to be after decades of low investment.
Nearly 40% of the electricity produced by Scottish wind farms has been wasted so far this year, because the grid was not able to move it to other parts of the UK or store it.
Overall then, consumers’ bills will be high, both now and in the future, because of the combined costs of imported gas, infrastructure and the guaranteed prices for producers.
Most calls to decrease these bills effectively come down to suggesting moving some of these costs on to taxpayers—so effectively from one bill to another. This is what happened in France, where “cheap” nuclear electricity is the result of vast amounts of government spending in the past. The French may not see UK-level energy bills, but they do have higher taxes and public debt.
Clouds on the horizon
Despite these challenges, successive UK governments have committed to continuing investment in new technologies, because dependence on imported, polluting and volatile fossil fuels is deemed too risky. Postponing the full transition to renewables, as reported in the Guardian, is effectively a bet that gas prices will decrease in the short term, and that the UK will be able to commission cheaper renewables later on.
But cheaper renewables present their own problems, because they play different roles. Solar and wind are cheaper, but intermittent. Nuclear is the most expensive but works all the time.
This all presents a challenging situation for UK consumers. New nuclear faces very long safety and planning procedures and the national grid needs to be modernized. The decision to cancel an ambitious project to get solar electricity from Morocco may be regretted.
But the main factor is simply geography and timing. Partly due to its location, the UK has become a world leader in wind power, a renewable technology that seems to be taking a less important global role than solar. And while the cost of solar production is decreasing steeply, the learning curve is slower for wind.
And there is no obvious way to increase the number of sunny hours in England. A country like Spain, with both a lot of sun and wind, has a much easier job transitioning to cheap renewables than the UK.
So, for all the frustration over high bills, the UK’s options are limited. Geography gives us wind, not sunshine. Policy has delivered world-class renewables, but also a grid struggling to carry their power.
The future will depend on whether new technologies, including cheaper batteries, tidal power and small modular nuclear reactors can fill the gaps left by weather and planning delays.
None of this will be easy or cheap. But the alternative—continued dependence on imported, volatile fossil fuels that make bills hostage to global crises—is worse.
UK consumers face a future where electricity remains more expensive than much of Europe, not only because of policy choices, but because it lacks the sunshine that’s driving costs down elsewhere. Betting on emerging technologies is the only way to close that gap.
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Why electricity costs so much in the UK (it’s not all about the weather) (2025, October 25)
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Tech
Dealing With Hearing Loss? These Over-the-Counter Hearing Aids Could Help
If you’re spending hundreds or thousands of dollars buying an OTC hearing aid, make sure you’re getting a product that offers a sustainable long-term solution to your hearing loss needs. Aside from the obvious things like sound quality, take a few minutes to look into these specs.
What size and style works best for you? Most hearing aids on the market are classified as either behind-the-ear (BTE) or in-the-ear (ITE). BTE hearing aids are probably what you think of when you picture a hearing aid, consisting of a plastic case that contains the electronics, a thin cable that goes over the ear and inside the canal, and a tiny speaker known as a “receiver,” which sends boosted audio from a person’s surroundings into their ear. By contrast, ITE models are self-contained units that look like a standard pair of wireless earbuds. In-the-ear hearing aids are popular for their incognito aesthetic, and they tend to be a lot easier to pop in and out than their behind-the-ear counterparts. Still, contemporary BTE hearing aids are significantly smaller than the ones “back in the day.” It just comes down to what fits you most comfortably.
Replaceable or rechargeable batteries? Much like wireless earbuds, most OTC hearing aids are equipped with rechargeable batteries and (usually) a portable charging case for easy transport. If you take the case’s battery life into account, you’ll find most OTC models last about a week before you need to connect to a power source. Without the case, rechargeable hearing aids offer anywhere from 10 to 24 hours of battery life per charge (but this goes down by a few hours if you’re using them to stream via Bluetooth). Replaceable batteries, such as those found on the Sony CRE-C10, can last for 70 hours or more before the battery dies. Sounds great, but it means having spares on hand and wrestling with tiny cells, which can be difficult for people with dexterity problems.
Are you comfortable making adjustments? While prescription hearing aids are fitted in-office by a licensed hearing care specialist, OTC devices are self-fitting. In most cases, OTC hearing aid users are expected to be able to tune the devices to their ears, usually with the help of a smartphone app. It’s certainly nice to make your own adjustments on the fly, but it may cost you in the way of personalized care.
What’s the company’s customer support like? If only you could count on quality support from every hearing aid manufacturer! Unfortunately, OTC hearing aid companies are just that—companies. There’s no “standard” for customer service in the industry. Companies like Jabra offer patients comprehensive support, but other brands may leave you on your own.
Is there a trial run? If you’re not happy with your hearing aids, you’ll probably want to have the option to return them without writing all that money off as a sunk cost. Most states require manufacturers to provide patients with a minimum trial period, but I recommend playing it safe by seeking out this info before buying.
What about warranties? Equally important to a reasonable trial period is the inclusion of a comprehensive manufacturer’s warranty. Most brands cover manufacturing defects for up to a year, but it goes without saying that the longer the coverage period, the better the deal. No matter which OTC hearing aid you end up with, make sure the warranty covers loss, damage, and wear and tear.
Tech
Gear News of the Week: There’s Yet Another New AI Browser, and Fujifilm Debuts the X-T30 III
An increasingly popular solution is the inclusion of a solar panel to keep that battery topped up, enabling you to install and potentially never touch the camera again. Both Wyze and TP-Link just revealed interesting solar-powered cameras this week. Let’s talk about Wyze first.
The Wyze Solar Cam Pan ($80) is a 2K outdoor security camera that can pan 360 degrees and tilt 70 degrees. It is IP65-rated, easy to mount, and sports a small solar panel that Wyze reckons can keep the camera running on just one hour of sunlight a day (we shall see as I test through the gray depths of a Scottish winter). The Solar Cam Pan also features AI-powered person tracking, two-way audio, color night vision, a spotlight, and a siren, though you need a subscription, starting from $3 per month, to unlock smart features and get cloud video storage.
Wyze also announced a new, impressively affordable Battery Video Doorbell ($66). We started testing Wyze cameras again recently after it beefed up its security policies, but the repeated security breaches, exposing thousands of camera feeds to other customers, may still give you pause.
Meanwhile, TP-Link is the first manufacturer to combine solar power with floodlight capability in its new Tapo C615F Kit. The similar-looking but larger Tapo C615F is another 2K camera, but it pans 360 degrees, tilts 130 degrees, and, most importantly, has an adjustable 800-lumen floodlight.
TP-Link says its solar panel only needs 45 minutes of sun a day to keep the camera ticking, and it comes with a handy 13-foot cable, so you can install the solar panel in the best spot to catch those rays. The Tapo C615F ($100) is available now, and you can use the promo code 10TAPOFLDCAM to get $10 off if you’re quick. —Simon Hill
Fujifilm Updates Its X-T30 Line
Courtesy of Fujifilm
Fujifilm has released the X-T30 III, an update to the company’s entry-level, SLR-shaped mirrorless X-T30 line. The third iteration of the X-T30 pairs Fujifilm’s familiar 26-MP X-Trans APS-C sensor with the latest Fujifilm processor, the X-Processor 5. The latter means that the X-T30 III is now roughly the same as the X-M5 and X-T50 in terms of internal features. All of Fujifilm’s film simulations are available, as are the subject-recognition AF modes. Video specs also see a bump up to 6.2K 30 fps open gate, and 4K 60 fps with a 1.18X crop.
The body is nearly identical to the previous model; the size, weight, and button/dial layout are the same as on the X-T30 II. The one change is that the control dial is now a film simulation dial, with three options for custom film recipes. The X-T30 III goes on sale in November at $999 for the body, or $1,150 for the body and a new 13- to 33-mm F3.5-6.3 zoom lens (20 mm- to 50 mm-equivalent). —Scott Gilbertson
Intel’s AI Experience Stores
In time for the peak shopping season, Intel is launching a variety of “AI Experience Stores” at a few key locations around the world. We don’t know exactly what they’ll be like, but Intel says these pop-ups will include an “AI-powered shopping experience” of some kind and are based on the initial launch of the trial run store in London last year.
If it keeps that same design ethos intact, these stores will be fairly immersive experiences. There will be lots of AI-driven demos on devices from the wider Windows laptop ecosystem, presumably to help drive interest and curiosity in what PCs can do. Interestingly, it comes on the back of a significant marketing push by Microsoft with its new Windows 11 AI experiences, trying to convince buyers to upgrade and explain some of the new AI features.
Here are the dates and locations below for when Intel’s stores will be open. —Luke Larsen
- New York City: 1251 6th Avenue (10/29 to 11/30)
- London: 95 Oxford Street (10/30 to 11/30)
- Munich: Viktualienmarkt 6 (10/30 to 12/9)
- Paris: 14 Boulevard Poissonniere (11/4 to 11/30)
- Seoul: OPUS 407, 1318-1 Seocho-dong (10/31 to 11/30)
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