Österbacka, R. ; Pal, A. J. ; Källman, K.-M. ; Stubb, H. (1998) Frequency response of molecularly thin alternating current light-emitting diodes Journal of Applied Physics, 83 (3). pp. 1748-1752. ISSN 0021-8979
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Official URL: http://jap.aip.org/resource/1/japiau/v83/i3/p1748_...
Related URL: http://dx.doi.org/10.1063/1.366894
Abstract
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 ( ≈ 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.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Institute of Physics. |
| Keywords: | Frequency Response; Langmuir-Blodgett Films; Polymer Films; Light Emitting Diodes; Electroluminescence; Molecular Electronics |
| ID Code: | 65654 |
| Deposited On: | 17 Oct 2011 10:44 |
| Last Modified: | 17 Oct 2011 10:44 |
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