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https://hdl.handle.net/11499/10579
Title: | Synthesis, photophysical and electrochemical properties of novel carbazole-triazine based high triplet energy, solution-processable materials | Authors: | Oner, S. Aydemir, M. Yesil, F. Şahin, Çiğdem Varlikli, C. |
Keywords: | Bipolar materials Carbazole Charge transfer Triazine Cyclic voltammetry Electrochemical properties Molecules Photoluminescence Polycyclic aromatic hydrocarbons Quantum yield Solvents Intra-molecular charge transfer Intramolecular charge transfers Photoluminescence quantum yields Photophysical behavior Solvent polarity effect Synthesis (chemical) Bands Charge Transfer Energy Materials Polarity |
Publisher: | Elsevier Ltd | Abstract: | A series of molecules; tBuCz1SiTrz, tBuCz2SiTrz and tBuCz3SiTrz, which contain carbazole unit as hole-transporting group (donor-D) and triazine unit as electron transporting group (acceptor-A) were synthesized and characterized as high-triplet energy (>2.9 eV), solution-processable bipolar emitting materials. The conjugation between the D-A groups was interrupted by using bulky tetraphenylsilane groups as spacer aiming to obtain large bandgap and high-triplet energy. The photophysical behaviors of the molecules were investigated by UV-Vis absorption, photoluminescence, phosphorescence, photoluminescence quantum yield and lifetime measurements. Solvent polarity effects were investigated on the intramolecular charge transfer (ICT) behaviour and large solvatochromic effect was observed with the increasing solvent polarity. Electrochemical properties were determined by cyclic voltammetry. All molecules showed oxidation bands arise from the carbazole groups. Reduction bands were originated from the triazine groups and the intramolecular charge transfer between D-A groups. Photophysical, electrochemical and computational characterizations addressed that tBuCz2SiTrz has the weakest ICT character, highest photoluminescence quantum yield (PLQY) and charge balance. © 2018 Elsevier Ltd | URI: | https://hdl.handle.net/11499/10579 https://doi.org/10.1016/j.dyepig.2018.06.014 |
ISSN: | 0143-7208 |
Appears in Collections: | Fen-Edebiyat Fakültesi Koleksiyonu Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection |
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