A biomimetic eye with a hemispherical perovskite nanowire array retina

Leilei Gu, Swapnadeep Poddar, Yuanjing Lin, Zhenghao Long, Daquan Zhang, Qianpeng Zhang, Lei Shu, Xiao Qiu, Matthew Kam, Ali Javey and Zhiyong Fan ()
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Leilei Gu: The Hong Kong University of Science and Technology
Swapnadeep Poddar: The Hong Kong University of Science and Technology
Yuanjing Lin: The Hong Kong University of Science and Technology
Zhenghao Long: The Hong Kong University of Science and Technology
Daquan Zhang: The Hong Kong University of Science and Technology
Qianpeng Zhang: The Hong Kong University of Science and Technology
Lei Shu: The Hong Kong University of Science and Technology
Xiao Qiu: The Hong Kong University of Science and Technology
Matthew Kam: The Hong Kong University of Science and Technology
Ali Javey: Electrical Engineering and Computer Sciences, University of California
Zhiyong Fan: The Hong Kong University of Science and Technology

Nature, 2020, vol. 581, issue 7808, 278-282

Abstract: Abstract Human eyes possess exceptional image-sensing characteristics such as an extremely wide field of view, high resolution and sensitivity with low aberration1. Biomimetic eyes with such characteristics are highly desirable, especially in robotics and visual prostheses. However, the spherical shape and the retina of the biological eye pose an enormous fabrication challenge for biomimetic devices2,3. Here we present an electrochemical eye with a hemispherical retina made of a high-density array of nanowires mimicking the photoreceptors on a human retina. The device design has a high degree of structural similarity to a human eye with the potential to achieve high imaging resolution when individual nanowires are electrically addressed. Additionally, we demonstrate the image-sensing function of our biomimetic device by reconstructing the optical patterns projected onto the device. This work may lead to biomimetic photosensing devices that could find use in a wide spectrum of technological applications.

Date: 2020
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DOI: 10.1038/s41586-020-2285-x

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