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Bicolour, large area, inkjet-printed metal halide perovskite light emitting diodes

Schröder, Vincent R.F. ; Fratzscher, Nicolas ; Zorn Morales, Nicolas ; Rühl, Daniel Steffen ; Hermerschmidt, Felix ; Unger, Eva L. LU and List-Kratochvil, Emil J.W. (2024) In Materials Horizons
Abstract

We demonstrate a bicoloured metal halide perovskite (MHP) light emitting diode (LED) fabricated in two sequential inkjet printing steps. By adjusting the printing parameters, we selectively and deliberately redissolve and recrystallize the first printed emissive layer to add a pattern emitting in a different color. The red light emitting features (on a green light emitting background) have a minimum size of 100 μm and originate from iodide-rich domains in a phase-segregated, mixed MHP. This phase forms between the first layer, a bromide-based MHP, which is partially dissolved by printing, and the second layer, an iodide-containing MHP. With an optimised printing process we can retain the active layer integrity and fabricate bicolour,... (More)

We demonstrate a bicoloured metal halide perovskite (MHP) light emitting diode (LED) fabricated in two sequential inkjet printing steps. By adjusting the printing parameters, we selectively and deliberately redissolve and recrystallize the first printed emissive layer to add a pattern emitting in a different color. The red light emitting features (on a green light emitting background) have a minimum size of 100 μm and originate from iodide-rich domains in a phase-segregated, mixed MHP. This phase forms between the first layer, a bromide-based MHP, which is partially dissolved by printing, and the second layer, an iodide-containing MHP. With an optimised printing process we can retain the active layer integrity and fabricate bicolour, large area MHP-based LEDs with up to 1600 mm2 active area. The two emission peaks at 535 nm and 710 nm are well separated and produce a strong visual contrast.

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organization
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Contribution to journal
publication status
epub
subject
in
Materials Horizons
publisher
Royal Society of Chemistry
external identifiers
  • pmid:38353605
  • scopus:85185468736
ISSN
2051-6347
DOI
10.1039/d3mh02025h
language
English
LU publication?
yes
id
a01d38cc-1258-4f4a-98ae-c66cdf93f0fc
date added to LUP
2024-03-20 12:05:11
date last changed
2024-04-17 14:01:54
@article{a01d38cc-1258-4f4a-98ae-c66cdf93f0fc,
  abstract     = {{<p>We demonstrate a bicoloured metal halide perovskite (MHP) light emitting diode (LED) fabricated in two sequential inkjet printing steps. By adjusting the printing parameters, we selectively and deliberately redissolve and recrystallize the first printed emissive layer to add a pattern emitting in a different color. The red light emitting features (on a green light emitting background) have a minimum size of 100 μm and originate from iodide-rich domains in a phase-segregated, mixed MHP. This phase forms between the first layer, a bromide-based MHP, which is partially dissolved by printing, and the second layer, an iodide-containing MHP. With an optimised printing process we can retain the active layer integrity and fabricate bicolour, large area MHP-based LEDs with up to 1600 mm<sup>2</sup> active area. The two emission peaks at 535 nm and 710 nm are well separated and produce a strong visual contrast.</p>}},
  author       = {{Schröder, Vincent R.F. and Fratzscher, Nicolas and Zorn Morales, Nicolas and Rühl, Daniel Steffen and Hermerschmidt, Felix and Unger, Eva L. and List-Kratochvil, Emil J.W.}},
  issn         = {{2051-6347}},
  language     = {{eng}},
  publisher    = {{Royal Society of Chemistry}},
  series       = {{Materials Horizons}},
  title        = {{Bicolour, large area, inkjet-printed metal halide perovskite light emitting diodes}},
  url          = {{http://dx.doi.org/10.1039/d3mh02025h}},
  doi          = {{10.1039/d3mh02025h}},
  year         = {{2024}},
}