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Condensed Matter Physics Seminar


Visualization of electrochemical doping and light-emitting junction formation in conjugated polymer films

Dr. Jun Gao
Department of Physics, Queen's University

Time
 
Wed. November 5, 2003     10:30 AM     Stirling 501

Abstract
 
In this talk I will describe the direct imaging of in situ electrochemical doping and light-emitting junction formation in conjugated polymer films. This work is based on a massive planar device structure we recently achieved (pLEC) at Queen's, which can have an interelectrode spacing 500 times larger than any other organic light-emitting devices. The extra-large pLECs we imaged (up to 10 mm interelectrode spacing) are by far the largest solid-state light-emitting devices ever created. The imaging of these devices directly confirmed the operating mechanism of polymer light-emitting electrochemical cells (LECs), which has been a subject of debate. In addition, it offers a unique and direct approach for polymer device and material research.

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