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Author

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

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Synthesis and properties of polyfluorene, containing oxadiazole and carbazole units as pendants for white light-emitting diodes

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Title
Synthesis and properties of polyfluorene, containing oxadiazole and carbazole units as pendants for white light-emitting diodes
Author
Jin, YoungeupSong, SuheeKim, Jin YoungKim, HeejooLee, KwangheeSuh, Hongsuk
Keywords
Light emitting diode; Polyfluorene; White color
Issue Date
200809
Publisher
ELSEVIER SCIENCE SA
Citation
THIN SOLID FILMS, v.516, no.21, pp.7373 - 7380
Abstract
Polyfluorene-based conjugated polymer, containing oxadiazole and carbazole units as pendants, was prepared as the emitting layer in light-emitting diodes (LEDs) to show that it has higher maximum brightness and electroluminescence (EL) efficiency as compared to poly(9,9-bis(2-ethylhexyl)fluorene-2,7-diyl). The prepared polymer, poly[9-(6-(N-carbazolyl)-hexyl)-9-(6-(4-(5-phenyl-1,3,4-oxadiazolyl)-phenoxy)-hexyl)-fluorene-2,7-diyl] was used as the emitting layer in LEDs. Oxadiazole and carbazole units as pendants caused aggregation to generate broad peak around 547 nm. The Commission internationale de l'eclairage coordinate of the LEDs was (0.28, 0.30) which is quite close to that of the standard white of National Television Systems Committee (0.31, 0.33). The maximum brightness and EL efficiency of the device with aluminum cathode were 6400 cd/m2 at 10V and 0.50 cd/A at 290mA/cm2, respectively.
URI
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DOI
http://dx.doi.org/10.1016/j.tsf.2008.02.034
ISSN
0040-6090
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