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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

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A blue-light-emitting polymer with a rigid backbone for enhanced color stability

Cited 44 times inthomson ciCited 44 times inthomson ci
Title
A blue-light-emitting polymer with a rigid backbone for enhanced color stability
Author
Park, Sung HeumJin, YoungeupKim, Jin YoungKim, Sun HeeKim, JinwooSuh, HongsukLee, Kwanghee
Keywords
MOLECULAR-WEIGHT DISTRIBUTION; CONJUGATED POLYMERS; GREEN EMISSION; POLYFLUORENE; DIODES; ELECTROLUMINESCENCE; FLUORESCENCE; AGGREGATION; COPOLYMERS; MORPHOLOGY
Issue Date
200711
Publisher
WILEY-V C H VERLAG GMBH
Citation
ADVANCED FUNCTIONAL MATERIALS, v.17, no.16, pp.3063 - 3068
Abstract
Despite the promising expectations of poly(fluorene) (PF)-type materials as efficient blue-light-emitting polymers, the devices based on these materials are not yet fully utilized. Under prolonged operation of the devices, the PF-type materials undergo degradation with the appearance of a long-range emission around 2.2-2.3 eV. As a consequence, the emissive color changes from blue to green with a decrease in the device efficiency. Here, an innovative approach that leads to a new blue-emitting polymer with remarkable color stability is reported. By modifying the chemical structure of PF to inhibit the formation of keto defects, it is demonstrated that the devices exhibit excellent color stability. This new blue-emitting polymer, poly(2,6-(4,4-bis(2-ethylhexyl)-4H-cyclopenta-[def]phenanthrene)) (PCPP), emits a stabilized, efficient blue electroluminescence without exhibiting any peak in the long-wavelength region even after prolonged operation of the devices in air.
URI
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DOI
http://dx.doi.org/10.1002/adfm.200700339
ISSN
1616-301X
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