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Philippe Holzhey @philippeholzhey.bsky.social · 7d

Those perovskites are considerably more stable than any other perovskite.

www.nature.com/articles/s41...

A green solvent enables precursor phase engineering of stable formamidinium lead triiodide perovskite solar cells - Nature Communications

The use of harmful solvents to fabricate stable devices hampers the commercialization of perovskite solar cells. Here, the authors introduce a biorenewable solvent system and precursor-phase engineering to realize stable formamidinium lead triiodide-based solar cells.

www.nature.com

Philippe Holzhey @philippeholzhey.bsky.social · 7d

Butylamine takes a H+ from methylammonium and forms a mixed 2D perovskite of BAMAPbI3 (the n is mixed). The 2D perovskite is then converted into a 3D perovskite with a conversion of FAI in butanol. One ends up with a phase pure FAPbI3 film.

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Philippe Holzhey @philippeholzhey.bsky.social · 7d

Heard a lot of people talk about the stability of the perovskite layer at the nature conference. A first good step is leaving behind coordinating solvents like DMSO and instead use amines which end up as part of the final perovskite! Using butylamine as coordinating solvent together with MeTHF

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Philippe Holzhey @philippeholzhey.bsky.social · 10d

On the way now to the Nature Conference for Perovskite Solar Cells :) hope to see some of you there!

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Philippe Holzhey @philippeholzhey.bsky.social · 27d

Love this snippet from the recent 80000 podcast. 80000hours.org/podcast/epis...

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Reposted by Philippe Holzhey

Pádraic Fogarty @whittledaway.bsky.social · 29d

New research from Queens University shows the critically endangered flapper skate continues its slide to extinction. The lead author, Patrick Collins, told me that it's not too late but decisive action is needed.

www.irishexaminer.com/lifestyle/ou...

One of the largest Irish animals is at imminent risk of further decline — new report

The flapper skate is critically endangered and are top predators and their absence, like taking wolves from a forest, can lead to impacts cascading through the ecosystem. It is hard to imagine that a ...

www.irishexaminer.com

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Philippe Holzhey @philippeholzhey.bsky.social · Aug 31

Kann mir nicht vorstellen das es nur einen Grund dafuer gibt. Sind vermutlich schon mehrere Einflussfaktoren.

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Philippe Holzhey @philippeholzhey.bsky.social · Aug 24

I have never heard an English speaker pronounce my first and last name right. But same goes for Germans at times - peak was when I got a swimming cap for Christmas from my coach which was spelled PhiLLippe.

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Philippe Holzhey @philippeholzhey.bsky.social · Aug 24

Yeah agree 😔 I hope it comes back with time!

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Philippe Holzhey @philippeholzhey.bsky.social · Aug 23

Somehow a bit sad here for perovskites. On twitter I had the feeling there was still somewhat of a perovskite solar cells community. But I havent really seen many interesting posts here about it.

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Philippe Holzhey @philippeholzhey.bsky.social · Aug 23

It is so rewarding!!! Had a similar experience last year. It was awesome to show at the conference

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Philippe Holzhey @philippeholzhey.bsky.social · Aug 23

Sorry to hear! One of the postdoc in your lab published in Nature after leaving the lab. He was driving for Uber at that time. Now he is a professor in Egypt.

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Philippe Holzhey @philippeholzhey.bsky.social · Aug 23

Life of an addict 😅🙈

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Philippe Holzhey @philippeholzhey.bsky.social · Aug 18

I was initially sceptical. But Manuel (the first author) actually convinced me. 2D perovskites for catalysis might really work with further improvements!

Philippe Holzhey @philippeholzhey.bsky.social · Aug 18

2D perovskite for catalysis! We studied the stability of 2D perovskites and understood why they are degrading.

advanced.onlinelibrary.wiley.com/doi/full/10....

Photodegradation of 2D Ruddlesden‐Popper Perovskites: Consequences and Design Principles for Photoelectrochemical Applications

In this study, we examined the structural and morphological stability of the 2D perovskite-phenylethylammonium lead iodide PEA(+)2PbI4 thin films in aqueous electrolytes of phenylethylammonium iodide....

advanced.onlinelibrary.wiley.com

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Philippe Holzhey @philippeholzhey.bsky.social · Aug 16

Worth a read:

Climate change is still a risk!

The shutdown of ocean currents could freeze Europe
economist.com/leaders/2025...
from The Economist

The shutdown of ocean currents could freeze Europe

When climate change poses a strategic threat, it needs a strategic response

economist.com

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Philippe Holzhey @philippeholzhey.bsky.social · Jul 18

Was at pink lake today :)

Philippe Holzhey @philippeholzhey.bsky.social · Jul 11

Saw a pretty lake yesterday :)

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Philippe Holzhey @philippeholzhey.bsky.social · Jul 6

Ohh damn I missed those! Enjoy :)

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Philippe Holzhey @philippeholzhey.bsky.social · Jul 2

Sure! I used a hyperspectral camera from Nireos the startup company in Italy. They use a interferometer approach to their camera which makes a lot cheaper and easier to install.

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Philippe Holzhey @philippeholzhey.bsky.social · Jul 2

More like ~120 nm. It is a confocal but one can use a 0.2 AU pinhole and still get good signal to noise ratio. It is essentially 25 point detectors instead of 1 and then the pixel is re-assigned

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Philippe Holzhey @philippeholzhey.bsky.social · Jul 2

Looks super cool! Last year I had a confocal which reached super-resolution coupled with a hyperspectral camera. Sadly only for two weeks but it was so much fun!

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Philippe Holzhey @philippeholzhey.bsky.social · Jun 29

Nice :) I am also at ICMAT

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Philippe Holzhey @philippeholzhey.bsky.social · Jun 9

Nice to see! It is also by the way directly possible to measure PL of grains. Confocal microscopy allows to go below the resolution limit of classical optical microscopes. Below is a gif of a measurement - green is PbI2. Red is perovskite. Green goes in and out of focus since it is on the surface

Philippe Holzhey @philippeholzhey.bsky.social · Jun 2

Graduated on the weekend :) now I am also officially a doctor

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