Optical, Photophysical, and Electroemission Characterization of Blue Emissive Polymers as Active Layer for OLEDs.
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| Title: | Optical, Photophysical, and Electroemission Characterization of Blue Emissive Polymers as Active Layer for OLEDs. |
|---|---|
| Authors: | Tselekidou, Despoina1 (AUTHOR) kypapado@physics.auth.gr, Papadopoulos, Kyparisis1 (AUTHOR) logot@auth.gr, Andrikopoulos, Konstantinos C.2 (AUTHOR) k.andrikopoulos@ac.upatras.gr, Andreopoulou, Aikaterini K.2 (AUTHOR) andreopo@upatras.gr, Kallitsis, Joannis K.2 (AUTHOR) kallitsi@upatras.gr, Logothetidis, Stergios1,3 (AUTHOR) alask@physics.auth.gr, Laskarakis, Argiris1 (AUTHOR), Gioti, Maria1 (AUTHOR) detselek@physics.auth.gr |
| Source: | Nanomaterials (2079-4991). Oct2024, Vol. 14 Issue 20, p1623. 19p. |
| Subjects: | Energy levels (Quantum mechanics), Light emitting diodes, Atomic force microscopy, Optical properties, Charge injection, Conjugated polymers |
| Abstract: | Polymers containing π-conjugated segments are a diverse group of large molecules with semiconducting and emissive properties, with strong potential for use as active layers in Organic Light-Emitting Diodes (OLEDs). Stable blue-emitting materials, which are utilized as emissive layers in solution-processed OLED devices, are essential for their commercialization. Achieving balanced charge injection is challenging due to the wide bandgap between the HOMO and LUMO energy levels. This study examines the optical and photophysical characteristics of blue-emitting polymers to contribute to the understanding of the fundamental mechanisms of color purity and its stability during the operation of OLED devices. The investigated materials are a novel synthesized lab scale polymer, namely poly[(2,7-di(p-acetoxystyryl)-9-(2-ethylhexyl)-9H-carbazole-4,4′-diphenylsulfone)-co-poly(2,6-diphenylpyrydine-4,4′-diphenylsulfone] (CzCop), as well as three commercially supplied materials, namely Poly(9,9-di-n-octylfluorenyl-2,7-diyl) (PFO), poly[9,9-bis(2′-ethylhexyl) fluorene-2,7-diyl] (PBEHF), and poly (9,9-n-dihexyl-2,7-fluorene-alt-9-phenyl-3,6-carbazole) (F6PC). The materials were compared to evaluate their properties using Spectroscopic Ellipsometry, Photoluminescence, and Atomic Force Microscopy (AFM). Additionally, the electrical characteristics of the OLED devices were investigated, as well as the stability of the electroluminescence emission spectrum during the device's operation. Finally, the determined optical properties, combined with their photo- and electro-emission characteristics, provided significant insights into the color stability and selectivity of each material. [ABSTRACT FROM AUTHOR] |
| Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 180525288 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Optical, Photophysical, and Electroemission Characterization of Blue Emissive Polymers as Active Layer for OLEDs. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Tselekidou%2C+Despoina%22">Tselekidou, Despoina</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> kypapado@physics.auth.gr</i><br /><searchLink fieldCode="AR" term="%22Papadopoulos%2C+Kyparisis%22">Papadopoulos, Kyparisis</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> logot@auth.gr</i><br /><searchLink fieldCode="AR" term="%22Andrikopoulos%2C+Konstantinos+C%2E%22">Andrikopoulos, Konstantinos C.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> k.andrikopoulos@ac.upatras.gr</i><br /><searchLink fieldCode="AR" term="%22Andreopoulou%2C+Aikaterini+K%2E%22">Andreopoulou, Aikaterini K.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> andreopo@upatras.gr</i><br /><searchLink fieldCode="AR" term="%22Kallitsis%2C+Joannis+K%2E%22">Kallitsis, Joannis K.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> kallitsi@upatras.gr</i><br /><searchLink fieldCode="AR" term="%22Logothetidis%2C+Stergios%22">Logothetidis, Stergios</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<i> alask@physics.auth.gr</i><br /><searchLink fieldCode="AR" term="%22Laskarakis%2C+Argiris%22">Laskarakis, Argiris</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gioti%2C+Maria%22">Gioti, Maria</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> detselek@physics.auth.gr</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Nanomaterials+%282079-4991%29%22">Nanomaterials (2079-4991)</searchLink>. Oct2024, Vol. 14 Issue 20, p1623. 19p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Energy+levels+%28Quantum+mechanics%29%22">Energy levels (Quantum mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Light+emitting+diodes%22">Light emitting diodes</searchLink><br /><searchLink fieldCode="DE" term="%22Atomic+force+microscopy%22">Atomic force microscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Optical+properties%22">Optical properties</searchLink><br /><searchLink fieldCode="DE" term="%22Charge+injection%22">Charge injection</searchLink><br /><searchLink fieldCode="DE" term="%22Conjugated+polymers%22">Conjugated polymers</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Polymers containing π-conjugated segments are a diverse group of large molecules with semiconducting and emissive properties, with strong potential for use as active layers in Organic Light-Emitting Diodes (OLEDs). Stable blue-emitting materials, which are utilized as emissive layers in solution-processed OLED devices, are essential for their commercialization. Achieving balanced charge injection is challenging due to the wide bandgap between the HOMO and LUMO energy levels. This study examines the optical and photophysical characteristics of blue-emitting polymers to contribute to the understanding of the fundamental mechanisms of color purity and its stability during the operation of OLED devices. The investigated materials are a novel synthesized lab scale polymer, namely poly[(2,7-di(p-acetoxystyryl)-9-(2-ethylhexyl)-9H-carbazole-4,4′-diphenylsulfone)-co-poly(2,6-diphenylpyrydine-4,4′-diphenylsulfone] (CzCop), as well as three commercially supplied materials, namely Poly(9,9-di-n-octylfluorenyl-2,7-diyl) (PFO), poly[9,9-bis(2′-ethylhexyl) fluorene-2,7-diyl] (PBEHF), and poly (9,9-n-dihexyl-2,7-fluorene-alt-9-phenyl-3,6-carbazole) (F6PC). The materials were compared to evaluate their properties using Spectroscopic Ellipsometry, Photoluminescence, and Atomic Force Microscopy (AFM). Additionally, the electrical characteristics of the OLED devices were investigated, as well as the stability of the electroluminescence emission spectrum during the device's operation. Finally, the determined optical properties, combined with their photo- and electro-emission characteristics, provided significant insights into the color stability and selectivity of each material. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.3390/nano14201623 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 19 StartPage: 1623 Subjects: – SubjectFull: Energy levels (Quantum mechanics) Type: general – SubjectFull: Light emitting diodes Type: general – SubjectFull: Atomic force microscopy Type: general – SubjectFull: Optical properties Type: general – SubjectFull: Charge injection Type: general – SubjectFull: Conjugated polymers Type: general Titles: – TitleFull: Optical, Photophysical, and Electroemission Characterization of Blue Emissive Polymers as Active Layer for OLEDs. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Tselekidou, Despoina – PersonEntity: Name: NameFull: Papadopoulos, Kyparisis – PersonEntity: Name: NameFull: Andrikopoulos, Konstantinos C. – PersonEntity: Name: NameFull: Andreopoulou, Aikaterini K. – PersonEntity: Name: NameFull: Kallitsis, Joannis K. – PersonEntity: Name: NameFull: Logothetidis, Stergios – PersonEntity: Name: NameFull: Laskarakis, Argiris – PersonEntity: Name: NameFull: Gioti, Maria IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 10 Text: Oct2024 Type: published Y: 2024 Identifiers: – Type: issn-print Value: 20794991 Numbering: – Type: volume Value: 14 – Type: issue Value: 20 Titles: – TitleFull: Nanomaterials (2079-4991) Type: main |
| ResultId | 1 |
