Dependence of the noise behavior on the drain current for thin film transistors

Ya-Hsiang Tai, Chun Yi Chang, Chung Lun Hsieh, Yung Hsuan Yang, Wei Kuang Chao, Huan Ean Chen

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


In this letter, a noise formula is newly proposed to calculate the low frequency noise for the three kinds of amorphous silicon, low temperature polycrystalline silicon, and amorphous indium-gallium-zinc oxide (a-IGZO) thin film transistors (TFTs). It is found that the noise behavior of the TFT depends on its drain current in a simple manner. Based on the analysis, the ratios of drain current to the noise level for these TFTs are compared. It reveals that a-IGZO TFT is the best candidate to be used in the active pixel sensor.

Original languageEnglish
Article number6701182
Pages (from-to)229-231
Number of pages3
JournalIEEE Electron Device Letters
Issue number2
StatePublished - 1 Feb 2014


  • active pixel sensor (APS)
  • amorphous indium-gallium-zinc oxide (a-IGZO)
  • low frequency noise (LFN)
  • Thin-film transistor (TFTs)


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