Ambipolar transport in an electrochemically gated single-molecule field-effect transistor
Díez-Pérez, I; Li, Z; Guo, S; Madden, C; Huang, H; Che, Y; Yang, X; Zang, L; Tao, N
| HERO ID | 3559510 |
|---|---|
| In Press | No |
| Year | 2012 |
| Title | Ambipolar transport in an electrochemically gated single-molecule field-effect transistor |
| Authors | Díez-Pérez, I; Li, Z; Guo, S; Madden, C; Huang, H; Che, Y; Yang, X; Zang, L; Tao, N |
| Journal | ACS Nano |
| Volume | 6 |
| Issue | 8 |
| Page Numbers | 7044-7052 |
| Abstract | Charge transport is studied in single-molecule junctions formed with a 1,7-pyrrolidine-substituted 3,4,9,10-perylenetetracarboxylic diimide (PTCDI) molecular block using an electrochemical gate. Compared to an unsubstituted-PTCDI block, spectroscopic and electrochemical measurements indicate a reduction in the highest occupied (HOMO)-lowest unoccupied (LUMO) molecular orbital energy gap associated with the electron donor character of the substituents. The small HOMO-LUMO energy gap allows for switching between electron- and hole-dominated charge transports as a function of gate voltage, thus demonstrating a single-molecule ambipolar field-effect transistor. Both the unsubstituted and substituted molecules display similar n-type behaviors, indicating that they share the same n-type conduction mechanism. However, the substituted-PTCDI block shows a peak in the source-drain current vs gate voltage characteristics for the p-type transport, which is attributed to a two-step incoherent transport via the HOMO of the molecule. |
| Doi | 10.1021/nn302090t |
| Pmid | 22789617 |
| Wosid | WOS:000307988900061 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Language Text | English |