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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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Color-tunable electroluminescent polymers by substitutents on the poly(p-phenylenevinylene) derivatives for light-emitting diodes

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Title
Color-tunable electroluminescent polymers by substitutents on the poly(p-phenylenevinylene) derivatives for light-emitting diodes
Author
Jin, SHKang, SYYeom, ISKim, Jin YoungPark, SHLee, KGal, YSCho, HN
Keywords
CONJUGATED POLYMERS; OPTICAL-PROPERTIES; BROMIDE
Issue Date
2002-12
Publisher
AMER CHEMICAL SOC
Citation
CHEMISTRY OF MATERIALS, v.14, no.12, pp.5090 - 5097
Abstract
Color tunable electroluminescent polymers, poly[2-{4'-[(3",7"-dimethyloctyl)oxylphenoxy}-1,4-phenylene-vinylene] (p-DMOP-PPV), poly[2-{3'-[(3",7"-dimethyloctyl)oxy]phenoxy}-1,4-phenylenevinylene} (m-DMOP-PPV), poly[2-{2'-[(3",7"-dimethyloctyl)oxylphenoxy}-1,4-phenylene vinylene] (o-DMOP-PPV), and poly[2-{4'-[(3",7"-dimethyloctyl)oxylphenoxyl-1,4-phenylenevinylene]-co-2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylenevinylene] (p-DMOP-PPV-co-MEH-PPV) were synthesized by the Gilch polymerization, and their electrooptical properties were characterized. The emission colors can be tuned by moving the bulky substitutents from the para to the ortho position in the phenoxy side group along the pi-conjugated polymer backbone. External photoluminescent (PL) quantum efficiencies of the present polymers are four or five times larger than that of MEH-PPV. Light-emitting diodes (LED) with the ITO/PEDOT/polymer/Al configuration were fabricated by using those polymers. The turn-on voltage of the p-DMOP-PPV-co-MEH-PPV (3:7) was found to be 1.8 V and it is lower than those of o-, m-, and p-DMOP-PPV and MEH-PPV. The LED performance of the p-DMOP-PPV-co-MEH-PPV was found to be improved with various feed ratios of MEH-PPV content as compared with the devices using pure p-DMOP-PPV or MEH-PPV. The maximum brightness and luminance efficiency of the present polymers were 7000 cd/m(2) and 1.0 cd/A at 10 V, respectively.
URI
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DOI
10.1021/cm020610t
ISSN
0897-4756
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ECHE_Journal Papers
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