A new image sensor has been developed which uses a new crystalline material that is similar to silicon. It is called perovesite and unlike traditional sensors that dedicate separate pixels to the identity of red, green and blue, perovesite sensor color filters can fully dig filter, which allows them to triple resolution and light-accelerated abilities.
Specific silicone semiconductor image sensors work similarly how the human eye does: individual cells recognize different colors such as red, green and blue. Since the semiconductor material absorbs light on the entire visual spectrum, manufacturers add RGB filters to the pixel so that they work like human eyes. But each time a filter is applied, it blocks the other two colors, which means that each pixel in the silicone image sensor only receives about one third of the available light.
Maksym is associated with Kovalenko and his team Eth zurich And EMPA has proposed a separate approach that will allow each photon of light to be used. For the last 10 years, they are developing that they say perovesite sensor, and thanks to thanks His recently published research They prove that it works.
“His innovative image is the base lead helid perovsite for the sensor. This crystalline material is also a semiconductor. However, it is particularly easy for the process – and its physical properties differ with their accurate chemical composition. It’s fine what the researchers are taking advantage of the Perovsit image sensor,” a pressure.
“If the perovskite contains a little more iodine ion, it absorbs red lights. For green, researchers add more bromine, for more blue chlorine-without any filter requirement. Perovsit pixel layers remain transparent for other wavelengths, so that they have to pass as another image. Is performed. “
Although this is still somewhat theoretical because the sensor is quick in its development, as layers can be stacked, they can dedicate each layer to a specific color and therefore the ability to collect triple light and resolution. It still takes three pixels to create a full color, but those pixels are occupied in the same vertical location, rather than that they need to arrange side-by-side. While the principle is good, what is exciting researchers say that they have created two perfectly functional perocyte image sensors.
“We are developing the technique from a rough proof of the principle to a dimension where it can actually be used,” called Kolanco. A common course of development for electronic components: “The first transistor included a large piece of germanium with some connections. Today, 60 years later, the transistor measures only a few nanometers.”
The results suggest that, as theory suggested, the sensors are more sensitive to light, color reproduction is more accurate, and can offer much more resolution than traditional silicone technology. The fact that each pixel captures all light, also eliminates certain artifacts of digital photography, such as Demosing and Moire Effect, claims the team.
However, a lot of work is still to be done. Researchers want to further reduce the size and increase the number of pixels in their perovite image sensors. Two prototypes have pixel shapes between 0.5 and 1 millimeters. For reference, the commercial image sensor has a specific micrometer range of pixel shape (1 micrometer is 0.001 millimeters). He said, researchers believe in technology and say that with time and further development, it should be possible to cross the current expectations on silicone with perovesite. Additionally, electronic connections and processing techniques need to be adjusted to work with this new technology (two sensors that researchers have already used two different readout techniques).
The co-writer of the study, “It should be possible to create smaller pixels than perovsite than silicon.” “Today’s readout electronics have been adapted to silicon. But the Perovsite is a separate semiconductor, which has various physical properties,” called Kolanco.
