Highly stretchable white-light electroluminescent devices with gel-type silica-coated all-inorganic perovskite

Sang Yeop Lee, Sanghyun Jeon, Junhyuk Ahn, Junsung Bang, Ho Kun Woo, Kyu joon Lee, Byung Ku Jung, Taesung Park, Donghee Son, Jae Pyoung Ahn, Soong Ju Oh

Research output: Contribution to journalArticlepeer-review

Abstract

In this study, a highly stretchable white-light electroluminescent device is fabricated using chemically designed perovskite nanocrystals (NCs). To incorporate perovskite into a stretchable polymer matrix without any degradation, gel-type silica-coated CsPbBr3 and CsPbBrxI3-x NC inks are prepared using (3-aminopropyl) triethoxysilane (APTES) with a sacrificial solvent of hexane. The chemical, optical, and structural properties of powdered and gel-type perovskite NCs with and without APTES are investigated. Silica shell with APTES treatment improves the stability of perovskite NCs, and gel-type inks improve the dispersivity in the polymer matrix. These enable the fabrication of stretchable and luminescent NC/polymer matrices with enhanced and uniform luminescence properties. By utilizing these materials, we propose a stretchable electroluminescent device emitting strong white light that is close to the ideal white position in Commission Internationale de l'éclairage (CIE) with optical simulation. Herein, we fabricate a multi-color filter with high color reproducibility on stretchable blue electroluminescent devices for white-light generation. Furthermore, all-solution-processed, color-filterless, stretchable, white-light electroluminescence devices with excellent optical and mechanical properties are fabricated.

Original languageEnglish
Article number150229
JournalApplied Surface Science
Volume563
DOIs
Publication statusPublished - 2021 Oct 15

Keywords

  • Cesium lead halide perovskite
  • Stretchable device
  • Surface chemistry
  • Surface modification
  • White light

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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