Yazar "Usluer, Ozlem" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • Küçük Resim Yok
    Öğe
    Thiol-ene-clickable and emissive carbazole-based polymer networks with tunable colors
    (ELSEVIER SCIENCE BV, 2016) Doyranli, Ceylan; Buyukcelebi, Sumeyra; Koyuncu, Sermet; Usluer, Ozlem; Kus, Mahmut; Koyuncu, Fatma Baycan
    Band gap tuning and processability of organic materials are significant topics for both scientific research and commercial applications. In this study, we synthesized a series of main chain cross-linkable polymers by thiol-ene click chemistry from N-allyl carbazole and different heterocycles via conventional Suzuki coupling polymerization reaction. The emission color of polymers could be successfully tuned from blue to red by attaching different benzazole-acceptor moieties to the carbazole donor unit. We also investigated the effects of cross-linking with respect to the amount of pentaerythritol tetrakis(3-mercaptopropionate) cross-linker on the optical, electrochemical, and surface morphological properties of the polymer films. The results showed that these polymers can be used as emissive active layers in solution-processable multilayer organic light-emitting diodes. (C) 2016 Published by Elsevier B.V.
  • Küçük Resim Yok
    Öğe
    White organic light emitting diodes based on fluorene-carbazole dendrimers
    (ELSEVIER SCIENCE BV, 2014) Usluer, Ozlem; Demic, Serafettin; Kus, Mahmut; Ozel, Faruk; Sariciftci, Niyazi Serdar
    In this paper, we report on the Prod. Type: FTP fabrication and characterization of blue and white light emitting devices based on two fluorene-carbazole containing dendrimers and para-sexiphenyl (6P) oligomers. Blue light emitting diodes were fabricated using 9',9 ''-(9,9-dioctyl-9H-fluorene-2,7-diyl)bis-9' H-9,3':6',9 ''-tercarbazole (OFC-G2) and 9',9 ''-(9,9'-spirobi[fluorene]-2,7-diyl)bis-9'H-9,3':6',9 ''-tercarbazole (SBFC-G2) dendrimers as a hole transport and emissive layer (EML) and 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP) as an electron transport layer. White light emitting diodes were fabricated using 6P and these two dendrimers as an EML OLED device with the structure of ITO/PEDOT:PSS (50 nm)/OFC-G2 (40 nm)/6P (20 nm)/LiF:Al (0.5:100 nm) shows maximum luminance of nearly 1400 cd/m(2) and a Commission Internationale de l'Eclairage chromaticity coordinates of (0.27, 0.30) at 12 V. (C) 2013 Elsevier B.V. All rights reserved.