We have developed a unique organic transistor structure which enables us to realize both p-channel and n-channel operation in a single device. This device also demonstrates the applicability of heterojunction concepts to organic semiconductors. The active material consists of two layers: the first layer, typically 10-20 nm thick, is made up of /spl alpha/-hexathienylene (/spl alpha/-6T), a thiophene oligomer which exhibits good p-channel operation. The second active material is C/sub 60/ and is about 20-30 nm thick. The energy levels of the occupied and unoccupied molecular orbitals of /spl alpha/-6T and C/sub 60/ are such that when the gate is biased negatively with respect to the source, the p-channel material is filled with holes and when the gate is biased positively, the n-channel material (C/sub 60/) is filled with electrons. A detailed analysis of the transistor characteristics provides important insights into transport in organic materials and is discussed.
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机译：我们开发了独特的有机晶体管结构，使我们能够在单个器件中同时实现p通道和n通道操作。该器件还证明了异质结概念对有机半导体的适用性。活性材料由两层组成：第一层通常为10-20 nm厚，由表现出良好p通道操作的噻吩低聚物/ spl alpha /-六亚乙烯基（/ spl alpha / -6T）组成。第二活性材料是C / sub 60 /，并且约20-30nm厚。 / spl alpha / -6T和C / sub 60 /的占据和未占据分子轨道的能级是这样的：当栅极相对于源极负偏置时，p沟道材料充满空穴，并且当栅极正偏，n沟道材料（C / sub 60 /）充满电子。晶体管特性的详细分析为有机材料的传输提供了重要的见识，并进行了讨论。
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