Superior AlGaN/GaN-Based Phototransistors and Arrays with Reconfigurable Triple-Mode Functionalities Enabled by Voltage-Programmed Two-Dimensional Electron Gas for High-Quality Imaging

© 2024 Wiley‐VCH GmbH.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 36(2024), 36 vom: 01. Sept., Seite e2405874
1. Verfasser: Zhang, Haochen (VerfasserIn)
Weitere Verfasser: Liang, Fangzhou, Yang, Lei, Gao, Zhixiang, Liang, Kun, Liu, Si, Ye, Yankai, Yu, Huabin, Chen, Wei, Kang, Yang, Sun, Haiding
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2024
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article imaging device and array multifunctional photoresponse photoelectric synapses two‐dimensional electron gas ultraviolet phototransistor
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520 |a High-quality imaging units are indispensable in modern optoelectronic systems for accurate recognition and processing of optical information. To fulfill massive and complex imaging tasks in the digital age, devices with remarkable photoresponsive characteristics and versatile reconfigurable functions on a single-device platform are in demand but remain challenging to fabricate. Herein, an AlGaN/GaN-based double-heterostructure is reported, incorporated with a unique compositionally graded AlGaN structure to generate a channel of polarization-induced two-dimensional electron gas (2DEGs). Owing to the programmable feature of the 2DEGs by the combined gate and drain voltage inputs, with a particular capability of electron separation, collection and storage under different light illumination, the phototransistor shows reconfigurable multifunctional photoresponsive behaviors with superior characteristics. A self-powered mode with a responsivity over 100 A W-1 and a photoconductive mode with a responsivity of ≈108 A W-1 are achieved, with the ultimate demonstration of a 10 × 10 device array for imaging. More intriguingly, the device can be switched to photoelectric synapse mode, emulating synaptic functions to denoise the imaging process while prolonging the image storage ability. The demonstration of three-in-one operational characteristics in a single device offers a new path toward future integrated and multifunctional imaging units 
650 4 |a Journal Article 
650 4 |a imaging device and array 
650 4 |a multifunctional photoresponse 
650 4 |a photoelectric synapses 
650 4 |a two‐dimensional electron gas 
650 4 |a ultraviolet phototransistor 
700 1 |a Liang, Fangzhou  |e verfasserin  |4 aut 
700 1 |a Yang, Lei  |e verfasserin  |4 aut 
700 1 |a Gao, Zhixiang  |e verfasserin  |4 aut 
700 1 |a Liang, Kun  |e verfasserin  |4 aut 
700 1 |a Liu, Si  |e verfasserin  |4 aut 
700 1 |a Ye, Yankai  |e verfasserin  |4 aut 
700 1 |a Yu, Huabin  |e verfasserin  |4 aut 
700 1 |a Chen, Wei  |e verfasserin  |4 aut 
700 1 |a Kang, Yang  |e verfasserin  |4 aut 
700 1 |a Sun, Haiding  |e verfasserin  |4 aut 
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773 1 8 |g volume:36  |g year:2024  |g number:36  |g day:01  |g month:09  |g pages:e2405874 
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