A research team at the School of Engineering of the Hong Kong University of Science and Technology (HKUST) have revealed the existence of surface concavities on individual crystal grains of perovskite thin films while unraveling their effects on the film’s properties and reliability.
To address issues surrounding the long-term stability of perovskite devices under light, humidity and thermomechanical conditions, the group conducted research focused on the materials’ microstructure. They discovered a proliferation of surface concavities at the crystalline grains of the perovskite material, shown to break the structural continuity at the perovskite film interface.
The team concluded that the broken structural continuity serves as a hidden microstructure factor limiting the efficiency and stability of perovskite cells. Based on this discovery, the team says it has pioneered a way of making these cells more efficient and stable via a chemo-elimination of these grain surface concavities.
“Structure and geometry of individual crystalline grains are the origin of the performance of perovskite semiconductors and solar cells,: says HKUST’s Prof. Zhou Yuanyuan, the corresponding author of the work.
“By unveiling the grain surface concavities, understanding their effects and leveraging chemical engineering to tailor their geometry, we are pioneering a new way of making perovskite solar cells with efficiency and stability toward their limits.”
The team’s research work, a collaboration with Hong Kong Baptist University and Yale University, is entitled “Elimination of Grain Surface Concavities for Improved Perovskite Thin-Film Interfaces. It was published in the journal Nature Energy.
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HKUST Engineering Researchers Increase Perovskite Solar Cell Reliability
I join those who say that the human race has evolved to be tribal and selfish. We are largely indifferent to the needs of others, and the capitalist society we’ve built has only served to reenforce this.
As Tom Waits observed, “We’re monkeys with money and guns.”
Now, are there some extremely decent and kind people spread around the globe? Of course. But they tend not to be the billionaires who make all the important decisions as to the how our culture will conduct itself.
Well, never is a long time, as they say.
Yet imagine this scenario, which is quite possible:
Trump is impeached and removed. Almost immediately, there is an incredible outpouring of information on an additional set of crimes committed by Trump and his administration. Simultaneously, the U.S. morphs into a social democracy, and its people enjoy quality education, access to healthcare, and prosperity, not unlike those in Northern Europe and elsewhere around the globe.
Yes, there will always be Republicans promising mass deportations and whatever else appeals to a dwindling MAGA base, but I would think they will have one hell of a hard time winning a national election.
The GOP can say the American economy is skyrocketing. But then there’s that nasty little piece of reality that people can’t afford groceries and are suffering financially more generally.
Or they can day that people are suffering financially, but it’s Biden’s fault. Oops. Biden left office 588 days ago.
Or they can say that the war in Iran has driven up gas prices, but that will turn immediately because we’ve won the war. Yikes. What can we say about all these bombs?
Or they can say that all the racial hatred and divisiveness is Obama’s fault. No, that’s problematic, since he’s been gone for almost 10 years.
Trump supporters may not be too sharp, but even they are having trouble accepting all this crap.
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