Planar polymer light-emitting electrochemical cells with extremely large interelectrode spacing

Gao, Jun; Dane, Justin
October 2003
Applied Physics Letters;10/13/2003, Vol. 83 Issue 15, p3027
Academic Journal
Planar polymer light-emitting electrochemical cells have been demonstrated with interelectrode spacings nearly 100 times larger than previously reported. Striking details of the p–i–n junction structure have been imaged directly using a digital camera. With an interelectrode spacing of 1.5 mm, a well-defined emission zone over 70 μm wide is observed near the cathode. Imaging under UV excitation reveals that the p-doped region migrates towards the cathode during operation, causing the emission zone at its frontier to shift. The width of the p-doped region is found to have a large variance, giving rise to an irregularly shaped emission zone. © 2003 American Institute of Physics.


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