CO2Gas Sensing by Cmos-Mems Scaln-Based Pyroelectric Detector Based on MID-IR Absorption

Doris K.T. Ng, Chong Pei Ha, Linfang Xu, Weiguo Chen, Yuan Hsing Fu, Tantan Zhang, Li Yan Siow, Norhanani Jaafar, Eldwin J. Ng, Yuan Gao, Hong Cai, Qingxin Zhang, Lennon Y.T. Lee

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

5 Citations (Scopus)

Abstract

CO2 gas sensing responses are measured using our in-house fabricated CMOS-MEMS ScAlN-based pyroelectric detector with 12% Sc doped concentration. Leveraging on mid-IR absorption behavior of CO2 gas caused by interaction of CO2 with light at 4.26 m wavelength, our ScAlN-based pyroelectric detector successfully detect CO2 gas response ranging from CO2 concentrations of 5000 ppm down to 200 ppm. Gas channel lengths are varied from 6 cm to 10 cm and their respective CO2 responses are measured. Finally, with N2 as the reference gas, we calculate the gas response percentage change of CO2 gas at different gas channel lengths and concentration.

Original languageEnglish
Title of host publication21st International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages827-830
Number of pages4
ISBN (Electronic)9781665412674
DOIs
Publication statusPublished - 20 Jun 2021
Externally publishedYes
Event21st International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2021 - Virtual, Online, United States
Duration: 20 Jun 202125 Jun 2021

Publication series

Name21st International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2021

Conference

Conference21st International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2021
Country/TerritoryUnited States
CityVirtual, Online
Period20/06/2125/06/21

Keywords

  • carbon dioxide gas sensor
  • CMOS-MEMS
  • Infrared Detector
  • ScAlN pyroelectric detector
  • uncooled

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Control and Optimization
  • Instrumentation

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