Jin, SH Kang, SY Yeom, IS Kim, JY Park, SH Lee, K Gal, YS Cho, HN 2024-01-21T09:40:41Z 2024-01-21T09:40:41Z 2021-09-01 2002-12 0897-4756 https://pubs.kist.re.kr/handle/201004/139033 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. English AMER CHEMICAL SOC BROMIDE) Color-tunable electroluminescent polymers by substitutents on the poly(p-phenylenevinylene) derivatives for light-emitting diodes Article 10.1021/cm020610t 1 CHEMISTRY OF MATERIALS, v.14, no.12, pp.5090 - 5097 CHEMISTRY OF MATERIALS 14 12 5090 5097 scie scopus 000180016600029 2-s2.0-0036915915 Chemistry, Physical Materials Science, Multidisciplinary Chemistry Materials Science Article BROMIDE) electroluminescence poly(-phenylenevinylene) light-emitting diodes