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Sensory Adaptation and Neuromorphic Phototransistors Based on CsPb(Br1-xIx)(3) Perovskite and MoS2 Hybrid Structure : Sensory Adaptation and Neuromorphic Phototransistors Based on CsPb(Br1- xIx)3Perovskite and MoS2Hybrid Structure
Cited 84 time in
Web of Science
Cited 86 time in Scopus
- Authors
- Issue Date
- 2020-08-25
- Publisher
- American Chemical Society
- Citation
- ACS Nano, Vol.14 No.8, pp.9796-9806
- Abstract
- Sensory adaptation is an essential part of biological neural systems for sustaining human life. Using the light-induced halide phase segregation of CsPb(Br1-xIx)3 perovskite, we introduce neuromorphic phototransistors that emulate human sensory adaptation. The phototransistor based on a hybrid structure of perovskite and transition-metal dichalcogenide (TMD) emulates the sensory adaptation in response to a continuous light stimulus, similar to the neural system. The underlying mechanism for the sensory adaptation is the halide segregation of the mixed halide perovskites. The phase separation under visible-light illumination leads to the segregation of I and Br into separate iodide- and bromide-rich domains, significantly changing the photocurrent in the phototransistors. The devices are reversible upon the removal of the light stimulation, resulting in near-complete recovery of the photosensitivity before the phase segregation (sensitivity recovery of 96.65% for 5 min rest time). The proposed phototransistor based on the perovskite-TMD hybrid structure can be applied to other neuromorphic devices such as neuromorphic photonic devices, intelligent sensors, and selective light-detecting image sensors.
- ISSN
- 1936-0851
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