Roll-to-roll fabricated perovskite solar cells under ambient room conditions: https://news.ycombinator.com/item?id=39998740
IIRC it was some different type of imaging sensor, so looked it up that way
Images produced from SPECT cameras have been around for a while. [2]
This is potentially a 16 pixel "camera" which the "image" is a gaussian blob (Figure 1e and 5e) [1].
This is interesting for a variety of reasons but is way overblown in the "camera" or "image" context. It's demonstration that one can make pixelated devices (4x4) of a specific kind of promising material.
[1]https://www.nature.com/articles/s41467-025-63400-7
[2]https://en.wikipedia.org/wiki/Single-photon_emission_compute...
Perovskite structures are interesting because they have unique material properties. The range of properties is quite broad: ferroelectric, pyroelectric, and piezoelectric properties, photoelasticity, very high permittivity, et cetera. In popular science news, you will mostly read about potential uses in solar cells, but they are already commonly used in our world: barium titanate is used as a dielectric in capacitors, lead zirconium titanate is used as the piezoelectric crystal in many resonators, lithium niobate is used for optical waveguides and for optical antialiasing filters because of its birefringence.
dylan604•4mo ago
I'm constantly amazed at what these articles do not show. Like if we have an example of a foggy window image and one from CZT and now one from this new sensor, why not show an example of each? A picture is worth a 1,000 words after all, so not including them really does the reader a disservice when reading these articles.
mhb•4mo ago
"Record energy resolutions are achieved as 2.5% at 141 keV and 1.0% at 662 keV. Single photon imaging with single point and line 99mTc γ-ray sources showcases the high sensitivity of 0.13%~0.21% cps/Bq. Phantom imaging distinctly delineates individual column sources spaced 7 mm apart, indicative of an impressive spatial resolution of 3.2 mm. These findings lay the groundwork for integrating perovskite detectors into nuclear medicine γ-ray imaging systems, offering a balance of cost-effectiveness and superior performance."
https://www.nature.com/articles/s41467-025-63400-7
simne•4mo ago
At Edison time, technologies was very unregulated, and because of this was cheap and easy achievable, but lot of people harmed, many just die.
Now you cannot just install other detector into existing (commercial) machine, because license for this machine is very strict, and don't accept any changes (or you will lost guarantee).
In developing countries, regulations usually not working so strict, but in developing countries x-ray machines are not so abundant, so they are just busy at working and have no spare time to make pictures for blog.
And if we choose scientific approach (not using commercial machine), to make x-ray machine from scratch, this is just another financial beast, magnitudes bigger.
So, when I see x-ray pictures in some "private" blog, I always wonder, if this is true private, and not another bubble, aimed to engage people and later sell them some other super-duper tech.