期刊
ADVANCED MATERIALS TECHNOLOGIES
卷 5, 期 9, 页码 -出版社
WILEY
DOI: 10.1002/admt.202000361
关键词
colloidal lithography; organic-static-induction transistors; small molecules; space-charge-limited current; vertical organic transistors
资金
- China Scholarship Council [201706890003, 201706070125]
- Deutsche Forschungsgemeinschaft (DFG) within the FlexARTwo project in the DFG Priority SPP Program 1796 [LE 747/52-2]
- Center for Advancing Electronics Dresden (cfaed)
The polymeric organic-static-induction transistor (OSIT), a solid-state vacuum triode, has been extensively studied as a promising vertical organic thin-film transistor. By utilizing polymers as organic semiconductors in OSITs, important performance figures have been achieved, for example, a maximum on-current output of about 10 mA cm(-2), on/off current ratio as high as 10(5), and a large current gain of 1000. However, even though polymers with higher mobility have been developed, the performance of OSITs has not been significantly improved yet. In this work, record-high performance OSITs with small-molecule materials as organic semiconductors are demonstrated. Pentacene as a hole-transport material for p-type OSITs can be easily deposited into pinholes of the gate electrode, hence creating effective conducting channels. Excellent characteristics, such as a high on-current greater than 260 mA cm(-2), on/off current ratio up to 3.3 x 10(5), and a large transmission factor of 99.98% as well as high current gain of 7965, are attained. These results make the small-molecule organic semiconductor a candidate material for vertical OSITs as well as for organic electronics.
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