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Development and Functionalization of Electrolyte-Gated Graphene Field-Effect Transistor for Biomarker Detection

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Pyroelectric infrared sensor with high absorptivity graphene electrodes.

Bin Xu, Qinqin Wu, Yuanqing Wang

|November 2, 2019

Summary

This study introduces a pyroelectric infrared device (PID) using high-absorptivity graphene electrodes (GE). The new PID-GE shows significantly improved performance, offering enhanced infrared detection capabilities.

Area of Science:

Materials Science
Sensor Technology
Nanotechnology

Background:

Pyroelectric infrared devices (PIDs) are crucial for thermal sensing.
Enhancing PID performance requires advanced electrode materials with high absorptivity.
Graphene's unique properties offer potential for improved infrared detection.

Purpose of the Study:

To develop a novel PID utilizing high-absorptivity graphene electrodes (GE).
To evaluate the performance enhancement of PIDs with GE compared to traditional electrodes.
To assess the infrared detection capabilities of the new PID-GE.

Main Methods:

Fabrication of PIDs using piezoelectric poly(vinylidene fluoride-trifluoroethylene) composite films.
Preparation of black graphene electrodes via screen-printing conductive ink.

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Comparative analysis with a control group (CG) device using Ni/Fe electrodes.

Performance testing at a chopping frequency of 3 Hz.

Main Results:

The PID with graphene electrodes (PID-GE) demonstrated a 204% increase in peak-to-peak voltage (Vpp) and a 31.65% improvement in signal-to-noise ratio (SNR) compared to the control group (PID-CG).
The PID-GE achieved a maximum detectivity of approximately 1.58×10^8 cm·Hz^1/2·W^-1.
Performance is comparable to commercial LiTaO3-based devices with black layers.

Conclusions:

High-absorptivity graphene electrodes significantly enhance PID performance.
Screen-printed graphene electrodes offer a viable and effective method for PID fabrication.
The developed PID-GE presents a promising alternative for advanced infrared sensing applications.