Kim, DY Lee, SK Kim, JL Kim, JK Lee, H Cho, HN Hong, SI Kim, CY 2024-01-21T12:41:22Z 2024-01-21T12:41:22Z 2021-09-05 2001-03 0379-6779 https://pubs.kist.re.kr/handle/201004/140677 We report the use of fluorene based copolymers containing quinoline (POF66, P1F66) and pyridine(PFPV) units as electron transporting polymers for multi-layered LEDs. Double-layer device structure combining P1F66 as electron-transporting layer with the emissive MEH-PPV showed a maximum quantum efficiency of 0.03%, which is 30 fold increased compared with ITO/MEHPPV/Al single-layer device. The ETL with the electron deficient moiety improved the LED performance by the characteristics of electron transporting as well as hole blocking between emissive layer and metal cathode. English ELSEVIER SCIENCE SA Improved efficiency of polymer LEDs using electron transporting layer Article 10.1016/S0379-6779(00)01486-7 1 SYNTHETIC METALS, v.121, no.1-3, pp.1707 - 1708 SYNTHETIC METALS 121 1-3 1707 1708 N scie scopus 000168831200286 2-s2.0-0035867117 Materials Science, Multidisciplinary Physics, Condensed Matter Polymer Science Materials Science Physics Polymer Science Article; Proceedings Paper LIGHT-EMITTING-DIODES electroluminescence photoluminescence conjugated polymers transport measurement