Journal
APPLIED PHYSICS LETTERS
Volume 102, Issue 15, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4802716
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Funding
- Industrial Strategic Technology Development program [10035225]
- MKE/KEIT
- Korea Evaluation Institute of Industrial Technology (KEIT) [10035225] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [R31-2012-000-10075-0] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Efficient triplet harvesting from exciplexes by reverse intersystem crossing (RISC) is reported using a fluorescent molecular system composed of the 4,4',4 ''-tris(N-carbazolyl)-triphenylamine and bis-4,6-(3,5-di-3-pyridylphenyl)-2-methylpyrimidine. The exciplex forming material system shows the efficient delayed fluorescence emission. As a result, almost 100% PL efficiency at 35K and 10% external quantum efficiency at 195K are achieved from the exciplex. The delayed fluorescence of the exciplex clearly demonstrates that a significant proportion of the triplet exciplexes is harvested through the RISC. (C) 2013 AIP Publishing LLC [http://dx.doi.org/10.1063/1.4802716]
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