2017 Fiscal Year Final Research Report
Development of liquid metal probes for conductivity measurements in organic field-effect transistors on insulator substrates
| Project/Area Number |
16K17518
|
|---|
| Research Category |
Grant-in-Aid for Young Scientists (B)
|
| Allocation Type | Multi-year Fund |
|---|
| Research Field |
Thin film/Surface and interfacial physical properties
|
|---|
| Research Institution | The University of Tokyo |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2016-04-01 – 2018-03-31
|
| Keywords | 液体金属 / 有機トランジスタ / 有機半導体 / 4端子電気伝導測定 / 表面・界面物性 |
|---|
| Outline of Final Research Achievements |
We have developed a liquid metal gallium indium (GaIn) probe by attaching a droplet of GaIn at the apex of a tungsten (W) scanning tunneling microscope tip. The GaIn probes enabled us to measure four-probe electronic transport property on a monolayer organic field-effect transistor, which is difficult to obtain by using conventional experimental methods. We found that field-effect mobility in monolayer pentacene film is highly sensitive to small amount of gas exposure of oxygen. Anisotropy in field-effect mobility on multilayer organic field-effect transistors was also studied by the GaIn probes. Highly anisotropic mobility as high as 40 was precisely measured by square four-probe method.
|
| Free Research Field |
薄膜・表面界面物性
|
