首页|Self-Driven Photo-Polarized Water Molecule-Triggered Graphene-Based Photodetector

Self-Driven Photo-Polarized Water Molecule-Triggered Graphene-Based Photodetector

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Flowing water can be used as an energy source for generators,providing a major part of the energy for daily life.However,water is rarely used for information or electronic devices.Herein,we present the feasibility of a polarized liquid-triggered photodetector in which polarized water is sandwiched between graphene and a semiconductor.Due to the polarization and depolarization processes of water molecules driven by photogenerated carriers,a photo-sensitive current can be repeatedly produced,resulting in a high-performance photodetector.The response wavelength of the photodetector can be fine-tuned as a result of the free choice of semiconductors as there is no requirement of lattice match between graphene and the semiconductors.Under zero voltage bias,the responsivity and specific detectivity of Gr/NaCl(0.5 M)W/N-GaN reach values of 130.7 mA/W and 2.3 x 109 Jones under 350 nm illumination,respectively.Meanwhile,using a polar liquid photodetector can successfully read the photoplethysmography signals to produce accurate oxygen blood saturation and heart rate.Compared with the commercial pulse oximetry sensor,the average errors of oxygen saturation and heart rate in the designed photoplethysmography sensor are～1.9％and～2.1％,respectively.This study reveals that water can be used as a high-performance photodetector in informative industries.

Shisheng Lin、Chang Liu、Xin Chen、Yi Zhang、Hongtao Lin、Xutao Yu、Yujiao Bo、Yanghua Lu

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College of Information Science and Electronic Engineering,Zhejiang University,Hangzhou 310027,P.R.China

Hangzhou Gelanfeng Technology Co.Ltd,Hangzhou 310051,P.R.China

State Key Laboratory of Modern Optical Instrumentation,Zhejiang University,Hangzhou 310027,P.R.China

Key Laboratory of Wide Bandgap Semiconductor Materials and Devices,HCSemitek Corporation,Yiwu 322009,P.R.China

Smart Materials for Architecture Research Lab,Innovation Center of Yangtze River Delta,Zhejiang University,Jiaxing 314100,P.R.China

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaDistinguished Youth Fund of Zhejiang Natural Science Foundation of ChinaSpecial Foundation of Young Professor of Zhejiang UniversityChina Postdoctoral Science Foundation

512022165155120361774135LR21F0400012013-QNA50072021M692767

2024

10.34133/research.0202

研究(英文)

研究(英文)

CSTPCD
ISSN：
年,卷(期)：2024.2024(2)
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