Gwangju Institute of Science and Technology

Bogyu Lim

Dong-Yu Kim

Hyung-Gu Jeong

Kang-Jun Baeg

Hong-Ju Park

Seung-Hwan Oh

Kang-Jan Baeg

Byung-Kwan Yu

Juhwan Kim

A semi-fluoroalkyl group substituted organic semiconductor polymer and an organic thin film transistor including the same are disclosed. A structure in which hydrogen of only a terminal of an alkyl group is substituted with fluorine exhibits significantly increased hole mobility, and significantly improved properties in terms of thermal stability and chemical stability, as compared to a structure in which all hydrogens coupled to a thiophene ring are substituted with fluorine, or a structure in which hydrogen of the terminal thereof is not substituted with fluorine and only hydrogens of the remaining portion are coupled to the thiophene ring.

Semi-fluoroalkyl group substituted organic semiconductor polymer and organic thin film transistor including the same

Provided are a polymer containing a thiophene unit and a thienylenevinylene unit, and an organic field effect transistor and an organic solar cell containing the polymer. The film may be formed by coating a substrate with a polymer containing a thiophene unit and a thienylenevinylene unit using a solution process. Therefore, the production cost may be reduced and a large-scale device may be suitably manufactured since there is no need for an expensive vacuum system to form films. Also, the polymer according to one embodiment of the present invention containing a thiophene unit and a thienylenevinylene unit has very excellent flatness since the thiophene unit is continuously coupled with a vinyl group having excellent flatness. Therefore, the polymer may be useful in further improving the charge mobility since it has high crystallinity caused by the improved ordering property between molecules. Such crystallinity may be further improved by the heat treatment. In addition, the organic compound according to one embodiment of the present invention containing a thienylenevinylene unit may have high oxidative stability because of its high ionization energy.

Polymer containing thiophene unit and thienylenevinylene unit, and organic field effect transistor and organic solar cell containing the polymer

Provided are an organic semiconductor compound using thiazole, and an organic thin film transistor having an organic semiconductor layer formed of the organic semiconductor compound using thiazole. The novel organic semiconductor compound including thiazole has liquid crystallinity and excellent thermal stability, and thus is provided to form an organic semiconductor layer in the organic thin film transistor. To this end, a silicon oxide layer is formed on a silicon substrate, and an organic semiconductor layer including thiazole is formed on the silicon oxide layer. In addition, source and drain electrodes are formed on both edge portions of the organic semiconductor layer. The organic thin film transistor using the organic semiconductor layer has an improved on/off ratio and excellent thermal stability. Also, a solution process can be applied in its manufacture.

Thiazole-based semiconductor compound and organic thin film transistor using the same

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Gwangju, South Korea

Bogyu Lim