Effect of thiophene linker addition to fluorene-benzotriazole polymers with the purpose of achieving white emission in OLEDs

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dc.authoridKOK, Cansu/0000-0002-0978-3633
dc.authoridPIRAVADILI, Selin/0000-0001-5030-6698
dc.authoridDoyranli, Ceylan/0000-0002-8635-4795
dc.authoridKoyuncu, Sermet/0000-0001-8352-8326
dc.contributor.authorKok, Cansu
dc.contributor.authorDoyranli, Ceylan
dc.contributor.authorCanimkurbey, Betul
dc.contributor.authorMucur, Selin Piravadili
dc.contributor.authorKoyuncu, Sermet
dc.date.accessioned2025-01-27T20:59:45Z
dc.date.available2025-01-27T20:59:45Z
dc.date.issued2020
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractWith the purpose of obtaining white emission from single layer organic light emitting diodes (OLEDs), fluorene benzotriazole based polymers with double bond subunits (namely TP2 and SP3 with and without thiophene linker, respectively) were synthesized by a Suzuki cross-coupling polymerization reaction. SP3 and TP2 were used as an emissive layer of the OLED devices due to their outstanding solubility in organic solvents, photoluminescence intensity and morphological suitability for fine thin film-forming capability. The optical, electrochemical, light emission and electroluminescence characteristics, Density Functional Theory (DFT) calculations and admittance spectroscopic analysis of OLEDs based on SP3 and TP2 were realized in detail to understand the effects of thiophene linker addition as a donor unit to the main chain of fluorene benzotriazole based polymers. As a result, TP2 emitted a bright yellow emission with a maximum brightness of 243 cd m(-2) at 40 mA cm(-2), and a maximum current efficiency of 1.38 cd A(-1) with more broad electroluminescence characteristics than SP3 polymer without the thiophene linker. SP3 emitted a greenish yellow emission with a maximum brightness of 1001 cd m(-2) at 845 mA cm(-2), and a maximum current efficiency of 0.33 cd A(-1). Carrier transport properties, charge carrier transit time and the equivalent circuit modelling studies were obtained through admittance spectroscopy. An equivalent circuit model with a combination of two resistors and one capacitor explained the charge conduction mechanism of SP3 and TP2 based OLEDs. SP3 and TP2 OLED devices represented typical p-type transporting characteristics with mobilities of 0.073 and 0.017 cm(2) V-1 s(-1), respectively with simplified device configuration. All the results indicate that thiophene addition to the main chain of fluorene benzotriazole based polymers with double bond subunits lead to a promising candidate for white emissive materials used in single layer white OLEDs.
dc.description.sponsorshipTurkish Academy of Sciences GEBIP program; Scientific and Technical Research Council of Turkey (TUBITAK) [114Z064]
dc.description.sponsorshipS. Koyuncu is grateful to Turkish Academy of Sciences GEBIP program and Scientific and Technical Research Council of Turkey (TUBITAK, project #: 114Z064) for financial support.
dc.identifier.doi10.1039/d0ra02527e
dc.identifier.endpage18647
dc.identifier.issn2046-2069
dc.identifier.issue32
dc.identifier.pmid35518315
dc.identifier.scopus2-s2.0-85085729140
dc.identifier.scopusqualityQ1
dc.identifier.startpage18639
dc.identifier.urihttps://doi.org/10.1039/d0ra02527e
dc.identifier.urihttps://hdl.handle.net/20.500.12428/26812
dc.identifier.volume10
dc.identifier.wosWOS:000536705400013
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.language.isoen
dc.publisherRoyal Soc Chemistry
dc.relation.ispartofRsc Advances
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WoS_20250125
dc.subjectSolution Processable Benzotriazole
dc.subjectSolar-Cells
dc.subjectCopolymers
dc.subjectPolyacetylene
dc.subjectDerivatives
dc.subjectInjection
dc.titleEffect of thiophene linker addition to fluorene-benzotriazole polymers with the purpose of achieving white emission in OLEDs
dc.typeArticle

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