In recent decades, organic semiconductor materials have emerged as an attractive alternative to i... more In recent decades, organic semiconductor materials have emerged as an attractive alternative to inorganic compounds for electronics applications. One application where organic semiconductor materials show particular potential is in the fabrication of transistors, such as organic field-effect transistors. These transistors modulate and switch electrical signals by utilizing a transverse electric field to influence charge transport across the transistor channel. In this project, a top-gate bottom-contact organic field-effect transistor architecture was modified to enable the addition of a ferroelectric polymer as the gate dielectric. These transistors, known as ferroelectric organic field-effect transistors, exhibit a characteristic hysteresis in their transfer properties as a result of the dipolar polarization states present in the ferroelectric polymer, making them excellent candidates for non-volatile memory applications. In this project, functional transistors were fabricated based on the developed experimental methodologies and characterized both in air at room temperature and under vacuum at varying temperatures. These transistors exhibited strong ferroelectric properties, with differences in source-drain current as high as four orders of magnitude between polarized and unpolarized states of the ferroelectric dielectric layer at zero gate bias. Transistor performance was also evaluated through the calculation of linear charge carrier mobility. For the samples measured at room temperature, the highest linear mobility was estimated to be 0.18 cm 2 /V*s. Measurements taken under vacuum at variable temperatures followed expected trends. The relatively low performance observed in these Fe-OFETs is indicative of imperfections in the fabrication procedure, which still has a significant amount of room for refinement. Temperature dependence data collected from one transistor serves as a baseline for further Fe-OFET temperature dependence experiments 1. Overall, this project established a foundation on which further studies of ferroelectric transistors at UVM can build.
This study aims to identify the formation of the escort team community and the important role of ... more This study aims to identify the formation of the escort team community and the important role of the ambulance escort. Research methods used by researchers are empirical studies by obtaining live data from interviews via social media with escort teams and communities in Indonesia. Research on the role of escort team helps the ambulance travel quickly to the assigned hospital. Early in the development of the escort team in Indonesia, due to people's indifference to the presence of ambulances when the ambulance sirens went off, this caused patients to bet their lives on the streets. Several communities and police departments disagreed on the escort team's presence, as it was in the interest of security and order in police traffic that had the authority to escort ambulances. In this case the host team helps the ambulance, since the ambulance asks escort teams to escort ambulances, for a definite decision or discrete of the police force to provide a specific clearance for the es...
In recent decades, organic semiconductor materials have emerged as an attractive alternative to i... more In recent decades, organic semiconductor materials have emerged as an attractive alternative to inorganic compounds for electronics applications. One application where organic semiconductor materials show particular potential is in the fabrication of transistors, such as organic field-effect transistors. These transistors modulate and switch electrical signals by utilizing a transverse electric field to influence charge transport across the transistor channel. In this project, a top-gate bottom-contact organic field-effect transistor architecture was modified to enable the addition of a ferroelectric polymer as the gate dielectric. These transistors, known as ferroelectric organic field-effect transistors, exhibit a characteristic hysteresis in their transfer properties as a result of the dipolar polarization states present in the ferroelectric polymer, making them excellent candidates for non-volatile memory applications. In this project, functional transistors were fabricated based on the developed experimental methodologies and characterized both in air at room temperature and under vacuum at varying temperatures. These transistors exhibited strong ferroelectric properties, with differences in source-drain current as high as four orders of magnitude between polarized and unpolarized states of the ferroelectric dielectric layer at zero gate bias. Transistor performance was also evaluated through the calculation of linear charge carrier mobility. For the samples measured at room temperature, the highest linear mobility was estimated to be 0.18 cm 2 /V*s. Measurements taken under vacuum at variable temperatures followed expected trends. The relatively low performance observed in these Fe-OFETs is indicative of imperfections in the fabrication procedure, which still has a significant amount of room for refinement. Temperature dependence data collected from one transistor serves as a baseline for further Fe-OFET temperature dependence experiments 1. Overall, this project established a foundation on which further studies of ferroelectric transistors at UVM can build.
This study aims to identify the formation of the escort team community and the important role of ... more This study aims to identify the formation of the escort team community and the important role of the ambulance escort. Research methods used by researchers are empirical studies by obtaining live data from interviews via social media with escort teams and communities in Indonesia. Research on the role of escort team helps the ambulance travel quickly to the assigned hospital. Early in the development of the escort team in Indonesia, due to people's indifference to the presence of ambulances when the ambulance sirens went off, this caused patients to bet their lives on the streets. Several communities and police departments disagreed on the escort team's presence, as it was in the interest of security and order in police traffic that had the authority to escort ambulances. In this case the host team helps the ambulance, since the ambulance asks escort teams to escort ambulances, for a definite decision or discrete of the police force to provide a specific clearance for the es...
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