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Photophysical and Electro-Optical Properties of Copolymers Bearing Blue and Red Chromophores for Single-Layer White OLEDs.

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Title: Photophysical and Electro-Optical Properties of Copolymers Bearing Blue and Red Chromophores for Single-Layer White OLEDs.
Authors: Tselekidou, Despoina1 (AUTHOR) detselek@physics.auth.gr, Papadopoulos, Kyparisis1 (AUTHOR) kypapado@physics.auth.gr, Kyriazopoulos, Vasileios1,2 (AUTHOR) vkyriazo@physics.auth.gr, Andrikopoulos, Konstantinos C.3 (AUTHOR) k.andrikopoulos@upnet.gr, Andreopoulou, Aikaterini K.3 (AUTHOR) andreopo@upatras.gr, Kallitsis, Joannis K.3 (AUTHOR) kallitsi@upatras.gr, Laskarakis, Argiris1 (AUTHOR) alask@physics.auth.gr, Logothetidis, Stergios1 (AUTHOR) logot@auth.gr, Gioti, Maria1 (AUTHOR) mgiot@physics.auth.gr
Source: Nanomaterials (2079-4991). Oct2021, Vol. 11 Issue 10, p2629. 1p.
Subjects: International Commission on Illumination, Chromophores, Visible spectra, Optical properties, Molecular weights, Energy transfer, Block copolymers
Abstract: In this study, novel copolymers consisting of blue and red chromophores are presented to induce emission tuning, enabling the definition of white light emission in a single polymeric layer. These aromatic polyether sulfones exhibit high molecular weights, excellent solubility and processability via solution deposition techniques. In addition, by carefully controlling the molar ratios of chromophores composition, the energy transfer mechanism, from blue to red chromophores, takes place enabling us to define properly the emission covering the entire range of the visible spectrum. The optical and photophysical properties of the monomers and copolymers were thoroughly investigated via NIR-Vis-far UV Spectroscopic Ellipsometry (SE), Absorbance and Photoluminescence (PL). These copolymers are used as an emissive layer and applied in solution-processed WOLED devices. The fabricated WOLED devices have been subsequently studied and characterized in terms of their electroluminescence properties. Finally, the WOLED devices possess high color stability and demonstrate CIE Coordinates (0.33, 0.38), which approach closely the pure white light CIE coordinates. [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.)
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  Data: Photophysical and Electro-Optical Properties of Copolymers Bearing Blue and Red Chromophores for Single-Layer White OLEDs.
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  Data: <searchLink fieldCode="AR" term="%22Tselekidou%2C+Despoina%22">Tselekidou, Despoina</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> detselek@physics.auth.gr</i><br /><searchLink fieldCode="AR" term="%22Papadopoulos%2C+Kyparisis%22">Papadopoulos, Kyparisis</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> kypapado@physics.auth.gr</i><br /><searchLink fieldCode="AR" term="%22Kyriazopoulos%2C+Vasileios%22">Kyriazopoulos, Vasileios</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> vkyriazo@physics.auth.gr</i><br /><searchLink fieldCode="AR" term="%22Andrikopoulos%2C+Konstantinos+C%2E%22">Andrikopoulos, Konstantinos C.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<i> k.andrikopoulos@upnet.gr</i><br /><searchLink fieldCode="AR" term="%22Andreopoulou%2C+Aikaterini+K%2E%22">Andreopoulou, Aikaterini K.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<i> andreopo@upatras.gr</i><br /><searchLink fieldCode="AR" term="%22Kallitsis%2C+Joannis+K%2E%22">Kallitsis, Joannis K.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<i> kallitsi@upatras.gr</i><br /><searchLink fieldCode="AR" term="%22Laskarakis%2C+Argiris%22">Laskarakis, Argiris</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> alask@physics.auth.gr</i><br /><searchLink fieldCode="AR" term="%22Logothetidis%2C+Stergios%22">Logothetidis, Stergios</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> logot@auth.gr</i><br /><searchLink fieldCode="AR" term="%22Gioti%2C+Maria%22">Gioti, Maria</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> mgiot@physics.auth.gr</i>
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  Data: <searchLink fieldCode="JN" term="%22Nanomaterials+%282079-4991%29%22">Nanomaterials (2079-4991)</searchLink>. Oct2021, Vol. 11 Issue 10, p2629. 1p.
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  Data: <searchLink fieldCode="DE" term="%22International+Commission+on+Illumination%22">International Commission on Illumination</searchLink><br /><searchLink fieldCode="DE" term="%22Chromophores%22">Chromophores</searchLink><br /><searchLink fieldCode="DE" term="%22Visible+spectra%22">Visible spectra</searchLink><br /><searchLink fieldCode="DE" term="%22Optical+properties%22">Optical properties</searchLink><br /><searchLink fieldCode="DE" term="%22Molecular+weights%22">Molecular weights</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+transfer%22">Energy transfer</searchLink><br /><searchLink fieldCode="DE" term="%22Block+copolymers%22">Block copolymers</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: In this study, novel copolymers consisting of blue and red chromophores are presented to induce emission tuning, enabling the definition of white light emission in a single polymeric layer. These aromatic polyether sulfones exhibit high molecular weights, excellent solubility and processability via solution deposition techniques. In addition, by carefully controlling the molar ratios of chromophores composition, the energy transfer mechanism, from blue to red chromophores, takes place enabling us to define properly the emission covering the entire range of the visible spectrum. The optical and photophysical properties of the monomers and copolymers were thoroughly investigated via NIR-Vis-far UV Spectroscopic Ellipsometry (SE), Absorbance and Photoluminescence (PL). These copolymers are used as an emissive layer and applied in solution-processed WOLED devices. The fabricated WOLED devices have been subsequently studied and characterized in terms of their electroluminescence properties. Finally, the WOLED devices possess high color stability and demonstrate CIE Coordinates (0.33, 0.38), which approach closely the pure white light CIE coordinates. [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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        Value: 10.3390/nano11102629
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        Text: English
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        StartPage: 2629
    Subjects:
      – SubjectFull: International Commission on Illumination
        Type: general
      – SubjectFull: Chromophores
        Type: general
      – SubjectFull: Visible spectra
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      – SubjectFull: Optical properties
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      – SubjectFull: Molecular weights
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      – SubjectFull: Energy transfer
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      – SubjectFull: Block copolymers
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      – TitleFull: Photophysical and Electro-Optical Properties of Copolymers Bearing Blue and Red Chromophores for Single-Layer White OLEDs.
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              Text: Oct2021
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