Band Tunable Microcavity Perovskite Artificial Human Photoreceptors

Electronic device versions of the neural functions of the human retina have high potential for use in artificial vision. This study demonstrates halide perovskite artificial human photoreceptors with specific photoresponses to red, green, and blue colors, which are consistent with human retinal phot...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2019-06, Vol.31 (24), p.e1900231-n/a
Main Authors: Tsai, Wei‐Lun, Chen, Chien‐Yu, Wen, Yu‐Ting, Yang, Lin, Cheng, Yu‐Lun, Lin, Hao‐Wu
Format: Article
Language:English
Subjects:
artificial human photoreceptors
Artificial vision
Color imagery
Cones
halide perovskites
Image reconstruction
Materials science
Optical filters
optical microcavities
Perovskites
Photoreceptors
Response time
Retina
spectral response
Substrates
Vacuum deposition
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Summary:Electronic device versions of the neural functions of the human retina have high potential for use in artificial vision. This study demonstrates halide perovskite artificial human photoreceptors with specific photoresponses to red, green, and blue colors, which are consistent with human retinal photoreceiving cones and rods. In contrast to the current programmable spectral‐response technologies, a novel microcavity structure is combined in this study with a perovskite absorber to achieve a targeted spectrum without using external optical filters. The fabricated artificial photoreceptors exhibit excellent performance including a high detectivity of more than 1013 Jones, a large linear dynamic range of 154 dB, and a short response time of 580 ns. These values are equal to or better than those of the natural human retina. These devices can easily be monolithically integrated on a single flexible substrate by using vacuum deposition, and a true proof‐of‐concept full‐color image reconstruction is demonstrated. Microcavity‐integrated monolithic flexible perovskite artificial human photoreceptors are demonstrated. The artificial cones and rods exhibit a true similarity with the natural human retina and exhibit excellent specific detectivity, large linear dynamic range, short response time, and low noise current. The potential of these versatile structures is manifested by reproducing a realistic full‐color image.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.201900231