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Polymer light-emitt...
Polymer light-emitting electrochemical cells : frozen-junction operation of an “ionic liquid” device
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- Shin, Joon-Ho (författare)
- Umeå universitet,Institutionen för fysik
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Xiao, Steven (författare)
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- Fransson, Åke (författare)
- Umeå universitet,Institutionen för tillämpad fysik och elektronik
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- Edman, Ludvig (författare)
- Umeå universitet,Institutionen för fysik
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(creator_code:org_t)
- Melville : American Institute of Physics (AIP), 2005
- 2005
- Engelska.
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Ingår i: Applied Physics Letters. - Melville : American Institute of Physics (AIP). - 0003-6951 .- 1077-3118. ; 87:4
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We report frozen-junction operation of a polymer light-emitting electrochemical cell containing a mixture of poly[2-methoxy-5-(2(')-ethyl-hexyloxy)-1,4-phenylenevinylene] (MEH-PPV) and the ionic liquid tetra-n-butylammonium trifluoromethanesulfonate (TBA-TF) as the active material. We find fast turn-on time, unipolar light emission, and significant operational lifetime up to T=200 K for planar Au/(TBA-TF+MEH-PPV)/Au surface cells, which had been charged (i.e., electrochemically p- and n-type doped in situ) at T=393 K and V=4 V and then cooled to 80 K at V=4 V. We employed differential scanning calorimetry to demonstrate that (TBA-TF+MEH-PPV) exhibits two melting transitions of TBA-TF crystalline phases located at T(m,1)approximate to 280 K and T(m,2)approximate to 380 K, respectively. The lower T-m,T-1 sets the upper limit for frozen-junction operation (with zero-ionic conductivity), while the larger T-m,T-2 correlates to the lower limit for the charging regime (with high ionic conductivity).
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Nyckelord
- I-N junction
- morphology
- stability
- efficient
- kinetics
- salt
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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