Communications of the ACM
Perovskite Artificial Retina Can Read Handwritten Numbers
In tests, the device was able to recognize handwritten numbers.
Credit: Depositphotos
Researchers at Saudi Arabia's King Abdullah University of Science and Technology (KAUST) have constructed an artificial retina from perovskite materials.
Perovskite can absorb light in a manner similar to the human eye, and the researchers embedded perovskite nanocrystals onto a polymer, then sandwiched that layer between aluminum and indium tin oxide electrodes, to admit light and generate a photoreceptor array.
The array was fabricated on a flexible polyimide substrate, and attached to a complementary metal-oxide semiconductor (CMOS) sensor and a neural network.
When illuminated by variable-hued light-emitting diodes, the artificial retina responded similarly to the human eye, and was especially sensitive to green light.
The system also could recognize handwritten numbers with 72% accuracy.
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