Kim, OK Woo, HY Lee, KS Kim, JK Kim, DY Shim, HK Kim, CY 2024-01-21T12:42:12Z 2024-01-21T12:42:12Z 2021-09-04 2001-03 0379-6779 https://pubs.kist.re.kr/handle/201004/140692 Bipolar light-emitting (LE) oligomers consisting of three sequential segments centered by dithienothiophene (DTT) as pi -center and attached by D/D or D/A pair: D-pi -D (dye 1) or D-pi -A (dye 2) where D and A refer to hole transporting (HT) and electron-transporting (ET) units, respectively. Their redox properties are alike, suggesting the resemblance in bipolarity. Photoluminescence (PL) shows that the symmetric D/D system has a higher PL quantum efficiency relative to the D/A system. Electroluminescence (EL) from a single-layer device using a PVK blend displays a slightly higher light intensity with D/A system while EL quantum efficiency of D/D system doubles that of D/A system. English ELSEVIER SCIENCE SA Photo/electroluminescent properties of novel bipolar oligomers Article 10.1016/S0379-6779(00)00662-7 1 SYNTHETIC METALS, v.121, no.1-3, pp.1607 - 1608 SYNTHETIC METALS 121 1-3 1607 1608 N scie scopus 000168831200241 2-s2.0-0035867880 Materials Science, Multidisciplinary Physics, Condensed Matter Polymer Science Materials Science Physics Polymer Science Article; Proceedings Paper POLYMERS HOLE photoluminescence electroluminescence and organic semiconductors