Method for determining glass-transition temperature of polymer film
A glass transition and polymer technology, applied in the investigation stage/state change, etc., to achieve good accuracy, good repeatability, and high sensitivity
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[0034] The organic field effect transistor device is placed on the Keithley 4200 micro-operation probe station equipped with a hot stage, and the output curve of the source and drain current changes with temperature. The gate voltage is constant at -60V, and the source and drain voltage is constant at -45V. The source-drain current output curve of the organic field effect transistor in the heating process, the temperature corresponding to the turning point of the source-drain current output curve is the glass transition temperature of the polymer sample to be tested.
[0035] Wherein, the material constituting the polymer thin film layer of the organic field effect transistor is a polymer sample to be tested.
[0036] The structure diagram of the organic field effect transistor is shown in figure 1 shown. Wherein, 1 is the gate electrode (silicon wafer) with inorganic insulating layer (silicon dioxide), 2 is the polymer thin film layer (that is, the polymer sample to be teste...
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