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Interfacial Polarization Mechanism in Image Sticking of Polyimide-Based Flexible OLEDs.

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Title: Interfacial Polarization Mechanism in Image Sticking of Polyimide-Based Flexible OLEDs.
Authors: Li, Zhipeng1,2 (AUTHOR) lizhipeng-b11@boe.com.cn, Li, Haowen2 (AUTHOR), Ma, Dawei1,2 (AUTHOR), Zhao, Baojie2 (AUTHOR), Li, Yanbo1 (AUTHOR)
Source: Polymers (20734360). Sep2025, Vol. 17 Issue 17, p2333. 9p.
Subjects: Polyimides, Polarization (Electricity), Amorphous silicon, Ferroelectricity, Display systems, Broadband dielectric spectroscopy, Organic light emitting diodes
Abstract: Organic light-emitting diodes (OLEDs) have emerged as a critical battleground in display technology due to their self-emissive and foldable properties. However, the adoption of polyimide (PI) as a flexible substrate material introduces technical challenges, particularly image sticking. This study proposes an interfacial polarization mechanism to explain this phenomenon, confirmed through dielectric and ferroelectric spectroscopy. The results show that introducing an amorphous silicon (α-Si) interlayer significantly improves interface compatibility, increasing the polarization response frequency from 74 Hz to 116 Hz and reducing residual polarization strength from 2.81 nC/cm2 to 1.00 nC/cm2. Practical tests on OLED devices demonstrate that the optimized structure (PI/α-Si/SiO2) lowers the image sticking score from 3.46 to 1.67, validating the proposed mechanism. This research provides both theoretical insights and practical solutions for mitigating image sticking in flexible OLED displays. [ABSTRACT FROM AUTHOR]
Copyright of Polymers (20734360) 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: Interfacial Polarization Mechanism in Image Sticking of Polyimide-Based Flexible OLEDs.
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  Data: <searchLink fieldCode="JN" term="%22Polymers+%2820734360%29%22">Polymers (20734360)</searchLink>. Sep2025, Vol. 17 Issue 17, p2333. 9p.
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  Data: <searchLink fieldCode="DE" term="%22Polyimides%22">Polyimides</searchLink><br /><searchLink fieldCode="DE" term="%22Polarization+%28Electricity%29%22">Polarization (Electricity)</searchLink><br /><searchLink fieldCode="DE" term="%22Amorphous+silicon%22">Amorphous silicon</searchLink><br /><searchLink fieldCode="DE" term="%22Ferroelectricity%22">Ferroelectricity</searchLink><br /><searchLink fieldCode="DE" term="%22Display+systems%22">Display systems</searchLink><br /><searchLink fieldCode="DE" term="%22Broadband+dielectric+spectroscopy%22">Broadband dielectric spectroscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Organic+light+emitting+diodes%22">Organic light emitting diodes</searchLink>
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  Data: Organic light-emitting diodes (OLEDs) have emerged as a critical battleground in display technology due to their self-emissive and foldable properties. However, the adoption of polyimide (PI) as a flexible substrate material introduces technical challenges, particularly image sticking. This study proposes an interfacial polarization mechanism to explain this phenomenon, confirmed through dielectric and ferroelectric spectroscopy. The results show that introducing an amorphous silicon (α-Si) interlayer significantly improves interface compatibility, increasing the polarization response frequency from 74 Hz to 116 Hz and reducing residual polarization strength from 2.81 nC/cm2 to 1.00 nC/cm2. Practical tests on OLED devices demonstrate that the optimized structure (PI/α-Si/SiO2) lowers the image sticking score from 3.46 to 1.67, validating the proposed mechanism. This research provides both theoretical insights and practical solutions for mitigating image sticking in flexible OLED displays. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Polymers (20734360) 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/polym17172333
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      – Code: eng
        Text: English
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        PageCount: 9
        StartPage: 2333
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        Type: general
      – SubjectFull: Polarization (Electricity)
        Type: general
      – SubjectFull: Amorphous silicon
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      – SubjectFull: Ferroelectricity
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      – SubjectFull: Display systems
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      – SubjectFull: Broadband dielectric spectroscopy
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      – SubjectFull: Organic light emitting diodes
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      – TitleFull: Interfacial Polarization Mechanism in Image Sticking of Polyimide-Based Flexible OLEDs.
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            NameFull: Li, Zhipeng
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            NameFull: Li, Haowen
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            – D: 01
              M: 09
              Text: Sep2025
              Type: published
              Y: 2025
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