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Kim, Jin Young
Next Generation Energy Laboratory
Research Interests
  • Polymer solar cells, QD solar cells, organic-inorganic hybrid solar cells, perovskite solar cells, OLEDs, PeLEDs, organic FETs


Voltage-controlled color change in polymer light-emitting diodes via thermochromism

DC Field Value Language Park, SH ko Kim, Jin Young ko Kim, H ko Lee, K ko 2014-09-29T01:35:18Z - 2014-09-25 ko 2005-04 -
dc.identifier.citation JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.46, no.4, pp.1049 - 1052 ko
dc.identifier.issn 0374-4884 ko
dc.identifier.uri -
dc.identifier.uri ko
dc.description.abstract We report a reversible color change in polymer light-emitting diodes (PLEDs) fabricated with a single layer of poly [2-methoxy, 5-(2' ethyl-hexyloxy)-1, 4-phenylene vinylene] (MEH-PPV). When we varied the applied voltage from 10 to 19 V, the devices changed their emission color from an orange-red (similar to 590 nm) to a, greenish-yellow (similar to 560 nm). Moreover, this process was reversible. We attribute this to an operating voltage-induced thermochromism in the PLEDs. At higher voltages, the temperatures of the devices were elevated due to Joule heating, which altered the conformation of the polymers from rod-like to coil-like. This conformational change resulted in a lesser degree of planarity of the polymer backbone, thereby broadening the pi - pi* gap of the polymers. ko
dc.description.statementofresponsibility close -
dc.language ENG ko
dc.publisher KOREAN PHYSICAL SOC ko
dc.subject Color adjustability ko
dc.subject Polymer light emitting diodes ko
dc.subject Thermochromism ko
dc.title Voltage-controlled color change in polymer light-emitting diodes via thermochromism ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-17744398244 ko
dc.identifier.wosid 000228458900055 ko
dc.type.rims ART ko
dc.description.wostc 4 *
dc.description.scopustc 5 * 2015-05-06 * 2014-09-25 *
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