dc.citation.endPage |
1052 |
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dc.citation.number |
4 |
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dc.citation.startPage |
1049 |
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dc.citation.title |
JOURNAL OF THE KOREAN PHYSICAL SOCIETY |
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dc.citation.volume |
46 |
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dc.contributor.author |
Park, SH |
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dc.contributor.author |
Kim, Jin Young |
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dc.contributor.author |
Kim, H |
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dc.contributor.author |
Lee, K |
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dc.date.accessioned |
2023-12-22T10:37:19Z |
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dc.date.available |
2023-12-22T10:37:19Z |
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dc.date.created |
2014-09-25 |
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dc.date.issued |
2005-04 |
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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. |
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dc.identifier.bibliographicCitation |
JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.46, no.4, pp.1049 - 1052 |
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dc.identifier.issn |
0374-4884 |
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dc.identifier.scopusid |
2-s2.0-17744398244 |
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dc.identifier.uri |
https://scholarworks.unist.ac.kr/handle/201301/6546 |
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dc.identifier.url |
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=17744398244 |
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dc.identifier.wosid |
000228458900055 |
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dc.language |
영어 |
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dc.publisher |
KOREAN PHYSICAL SOC |
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dc.title |
Voltage-controlled color change in polymer light-emitting diodes via thermochromism |
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dc.type |
Article |
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dc.description.journalRegisteredClass |
scopus |
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