Intrinsically Stretchable Emissive Layer for Green and Red Phosphorescent OLEDs: Small Molecules Blended with SEBS Elastomer

Hyein Ha, Jaeseung Kim, Young Jae Shim, Aqsa Irfan, Ajay Nimbalkar, Ramachandran Elumalai, Thi Na Le, Hyunjung Kim, Min Chul Suh

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

In the field of stretchable electronics, intrinsically stretchable organic light-emitting diodes (IS-OLEDs) are considered to be essential units. However, research on stretchable electroluminescent layers for light-emitting devices is limited. The most common method to obtain an effective stretchable emitting layer is blending a conjugated polymer with an elastomer. In this study, blending small molecules with a thermoplastic styrene-ethylene-butylene-styrene (SEBS) elastomer to fabricate a stretchable emitting layer is proposed. The mechanical, electrical, and morphological properties of the blended films are studied. The results show that the blended films can be stretched up to 200% without any morphological change such as cracking or particle shedding. Additionally, an OLED is fabricated with a stretchable electroluminescent layer and demonstrated its functionality.

Original languageEnglish
Article number2300924
JournalAdvanced Materials Technologies
Volume8
Issue number21
DOIs
Publication statusPublished - 10 Nov 2023

Bibliographical note

Publisher Copyright:
© 2023 Wiley-VCH GmbH.

Keywords

  • X-ray reflectivity
  • blending of elastomers
  • high strain capability
  • intrinsically stretchable EML
  • phase separations
  • small molecules

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