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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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Substituent position-induced color tunability in polymer light-emitting diodes

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Title
Substituent position-induced color tunability in polymer light-emitting diodes
Author
Kim, Jin YoungPark, SHLee, KYum, ISJin, SH
Keywords
Color tunability; Conjugated length; Electroluminescence spectra; Main chains; Planarity; Polymer light-emitting diodes; Steric effect
Issue Date
2002-08
Publisher
AMER INST PHYSICS
Citation
APPLIED PHYSICS LETTERS, v.81, no.9, pp.1732 - 1734
Abstract
We report substituent position-induced color tunability in polymer light-emitting diodes fabricated with poly[2-{2- or 3- or 4-[(3,7-dimethyloctyl)oxy] phenyoxy}-1,4-phenylenevinylene] (DMOPPPV). When the position of the substituent in DMOP-PPV moves to the ortho, meta, and para sites, the corresponding photo- and electroluminescence spectra shift their peaks to a longer wavelength of about 540, 560, and 585 nm, respectively. We ascribe this to the different degree of steric effect in the backbone for each substituent position. As the substituent position is closer to the main chain, the planarity of the backbone is less conserved, thereby reducing the effective conjugated length of the main chain and broadening the pi-pi(*) energy gap
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DOI
10.1063/1.1502911
ISSN
0003-6951
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ECHE_Journal Papers
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