Perovskite Artificial Retina Can Read Handwritten Numbers

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.

From New Atlas
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