Micropatterned 2D Hybrid Perovskite Thin Films with Enhanced Photoluminescence Lifetimes

Machteld E. Kamminga* (Corresponding Author), Hong Hua Fang, Maria Antonietta Loi, Gert H. Ten Brink, Graeme R. Blake, Thomas T.M. Palstra, Johan E. ten Elshof (Corresponding Author)

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

16 Citations (Scopus)
104 Downloads (Pure)

Abstract

The application of luminescent materials in display screens and devices requires micropatterned structures. In this work, we have successfully printed microstructures of a two-dimensional (2D), orange-colored organic/inorganic hybrid perovskite ((C6H5CH2NH3)2PbI4) using two different soft lithography techniques. Notably, both techniques yield microstructures with very high aspect ratios in the range of 1.5-1.8. X-ray diffraction reveals a strong preferential orientation of the crystallites along the c-axis in both patterned structures, when compared to nonpatterned, drop-casted thin films. Furthermore, (time-resolved) photoluminescence (PL) measurements reveal that the optical properties of (C6H5CH2NH3)2PbI4 are conserved upon patterning. We find that the larger grain sizes of the patterned films with respect to the nonpatterned film give rise to an enhanced PL lifetime. Thus, our results demonstrate easy and cost-effective ways to manufacture patterns of 2D organic/inorganic hybrid perovskites, while even improving their optical properties. This demonstrates the potential use of color-tunable 2D hybrids in optoelectronic devices.

Original languageEnglish
Pages (from-to)12878-12885
Number of pages8
JournalACS applied materials & interfaces
Volume10
Issue number15
DOIs
Publication statusPublished - 18 Apr 2018

Keywords

  • UT-Hybrid-D
  • High aspect ratio
  • Imprint lithography
  • Micromolding in capillaries
  • Organic/inorganic hybrids
  • Photoluminescence

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