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Abstract
A hybrid metal-base organic transistor composed of a vacuum-deposited small-molecule emitter layer and a solution-processed polymer collector layer was fabricated using three types of conductive polymer, poly(3-hexylthiophene) (P3HT), poly(2-methoxy-5(2′-ethyl)hexoxy-phenylenevinylene (MEH-PPV) and poly(9, 9-dioctylfluorene-co-benzothiadiazole) (F8BT). Clear current amplification was observed only in the device with P3HT, and output current density of 12.6 mA/cm2, on/off ratio of 105, and current amplification factor of 76 were achieved at a collector voltage of 5 V and base voltage of 3 V. The output current decreased in order of P3HT > MEH-PPV > F8BT. The relationship between energy levels of polymer materials and carrier transmission process through the base electrode were discussed.
Acknowledgments
This research was supported by the New Energy and Industrial Technology Development Organization (NEDO), PRESTO program by the Japan Science and Technology Agency (JST), a Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science (JSPS).