Sammanfattning
The frequency response of molecularly thin alternating-current polymeric light-emitting diodes has been studied. Langmuir-Blodgett (LB) films of poly(3-hexylthiophene) (PHT) were used as the active emitting material and the device was formed by sandwiching PHT films between LB films of emeraldine base polyaniline. As a step towards molecular electronic devices, we have shown that even two molecular layers of PHT (approximate to 6 nm) are sufficient for light emission. The high frequency operation limit of the device has been discussed in terms of a charge accumulation process at the polymer-polymer interface. The electroluminescence (EL) spectra of different structures have been compared with corresponding photoluminescence spectra. A significant blueshift in EL has been observed in thinner structures and its origin has been discussed. (C) 1998 American Institute of Physics. [S0021-8979(98)02103-3].
| Originalspråk | Odefinierat/okänt |
|---|---|
| Sidor (från-till) | 1748–1752 |
| Antal sidor | 5 |
| Tidskrift | Journal of Applied Physics |
| Volym | 83 |
| Nummer | 3 |
| Status | Publicerad - 1998 |
| MoE-publikationstyp | A1 Tidskriftsartikel-refererad |