Sensing performance of EGFET pH sensors with CZTSe nanoparticles fabricated on glass substrates

Pay Yu Lee, Sheng Po Chang, Po Jui Kuo, En Hao Hsu, Shoou Jinn Chang, Shih Chang Shei

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

In this work, the sensing membrane of an extended-gate field-effect-transistor (EGFET) pH sensor with CZTSe nanoparticles was fabricated on a glass substrate through a solution-based method. The CZTSe nanocrystals were synthesized successfully by using the metal sources in isophorondiamine (IPDA, C10H22N2) solution under a N2 flow at atmospheric pressure and at the reaction temperature of 235 °C. It was found that the average diameter of these nanoparticles was 20-30 nm. The resulting EGFET pH sensors with CZTSe nanocrystals exhibited good sensing performances owing to the large sensing surface-to-volume ratio. The pH sensitivity calculated from the linear relation between the drain-source current and the pH value was 7 μA/pH, and that calculated from the linear relation between the reference voltage and the pH value was 9 mV/pH.

Original languageEnglish
Pages (from-to)3866-3875
Number of pages10
JournalInternational Journal of Electrochemical Science
Volume8
Issue number3
Publication statusPublished - 2013 Mar

All Science Journal Classification (ASJC) codes

  • Electrochemistry

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