Publication

Semiconductor Materials and Devices Lab

Paper

  • 2023
  • Neuromorphic computing based on halide perovskites
    • Nature Electronics, 6, 949–962 (2023)
  • Maria Vasilopoulou*, Abd Rashid bin Mohd Yusoff*, Yang Chai, Michael-Alexandros Kourtis, Toshinori Matsushima, Nicola Gasparini, Rose Du, Feng Gao, Mohammad Khaja Nazeeruddin, Thomas D Anthopoulos*, Yong-Young Noh*
Diketopyrrolopyrrole-based polymer transistors for hazardous volatile organic compound detection
저자
Gi-Seong Ryu, Benjamin Nketia-Yawson, Eun-Young Choi*, Yong-Young Noh*
저널명
Organic Electronics, 51, 264-268 (2017)
년도
2017

[Abstract]

Here, we report on highly sensitive OTFT sensors based on ultrathin poly[[2,5-bis(2-octyldodecyl)-2,3,5,6-tetrahydro-3,6-dioxopyrrolo[3,4-c]pyrrole-1,4-diyl]-alt-[[2,2′-(2,5-thiophene)bis-thieno(3,2-b)thiophene]-5,5′-diyl]] (DPPT-TT) organic thin film transistors (OTFTs) for detection of volatile organic compounds (VOCs). The flexible ultrathin DPPT-TT-OTFT sensors show high sensitivity of ∼87% in the exposed ammonia compared to ethanol and ethylene gases, which is ascribed to severe hole trapping in the semiconducting channel. Additionally, the gas sensor exhibit intense alteration of the OTFT performance parameters, including turn-on voltage, threshold voltage, and on and off current to common VOCs, such as 2-propanol, trichloroethylene, and 1,2-dichloroethane. In particular high sensitivity with good reversibility is achieved in the exposed 2-propanol.This work demonstrates that OTFTs with the dye-based conjugated polymers have great potential to realize real-time monitoring of various hazardous VOCs.