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Spacer cation engineering in Ruddlesden-Popper perovskites for efficient red light-emitting diodes with recommendation 2020 color coordinates

Qing, Jian ; Ramesh, Sankaran LU orcid ; Liu, Xiao-Ke ; Wang, Heyong ; Yu, Hongling ; Kuang, Chaoyang ; Hou, Lintao ; Zhang, Wenjing ; Sum, Tze Chien and Gao, Feng (2023) In Applied Surface Science 616.
Abstract

Ruddlesden-Popper perovskites (RPPs) have been demonstrated as a very promising approach for tuning the emission color of perovskite light-emitting diodes (PeLEDs). However, achieving high-performance red PeLEDs with recommendation 2020 color coordinates is still challenging due to the lack of reasonable control over the properties of RPP films. Here, we demonstrate that the judicious selection of spacer cations in RPPs affords a lever for engineering their film properties, including phase distribution, energy funneling process, trap density, and carrier mobility. Four structurally related spacer cations, benzylammonium (BZA), phenylethylammonium (PEA), 3-phenyl-1-propylammonium (PPA), and phenoxyethylammonium (POEA), are studied. Owing... (More)

Ruddlesden-Popper perovskites (RPPs) have been demonstrated as a very promising approach for tuning the emission color of perovskite light-emitting diodes (PeLEDs). However, achieving high-performance red PeLEDs with recommendation 2020 color coordinates is still challenging due to the lack of reasonable control over the properties of RPP films. Here, we demonstrate that the judicious selection of spacer cations in RPPs affords a lever for engineering their film properties, including phase distribution, energy funneling process, trap density, and carrier mobility. Four structurally related spacer cations, benzylammonium (BZA), phenylethylammonium (PEA), 3-phenyl-1-propylammonium (PPA), and phenoxyethylammonium (POEA), are studied. Owing to narrow phase distribution, efficient energy funneling, and low trap density, the POEA-based RPP films enable efficient red PeLEDs with a peak external quantum efficiency of 10.3%, a maximum brightness of 1052 cd m−2, and excellent spectral stability. Significantly, the electroluminescence spectrum represents CIE 1931 color coordinates of (0.71, 0.29), which meets the recommendation 2020 standard (0.708, 0.292). The findings provide useful guidelines for the rational design of new organic spacer cations for RPPs with high performance.

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author
; ; ; ; ; ; ; ; and
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Electroluminescence, Light-emitting diodes, Ruddlesden-Popper perovskites, Spacer cations
in
Applied Surface Science
volume
616
article number
156454
publisher
Elsevier
external identifiers
  • scopus:85147192773
ISSN
0169-4332
DOI
10.1016/j.apsusc.2023.156454
language
English
LU publication?
no
additional info
Publisher Copyright: © 2023 The Authors
id
a73a280b-d31b-45b7-93e8-26a7c876b056
date added to LUP
2023-02-15 21:58:24
date last changed
2023-03-04 18:55:39
@article{a73a280b-d31b-45b7-93e8-26a7c876b056,
  abstract     = {{<p>Ruddlesden-Popper perovskites (RPPs) have been demonstrated as a very promising approach for tuning the emission color of perovskite light-emitting diodes (PeLEDs). However, achieving high-performance red PeLEDs with recommendation 2020 color coordinates is still challenging due to the lack of reasonable control over the properties of RPP films. Here, we demonstrate that the judicious selection of spacer cations in RPPs affords a lever for engineering their film properties, including phase distribution, energy funneling process, trap density, and carrier mobility. Four structurally related spacer cations, benzylammonium (BZA), phenylethylammonium (PEA), 3-phenyl-1-propylammonium (PPA), and phenoxyethylammonium (POEA), are studied. Owing to narrow phase distribution, efficient energy funneling, and low trap density, the POEA-based RPP films enable efficient red PeLEDs with a peak external quantum efficiency of 10.3%, a maximum brightness of 1052 cd m<sup>−2</sup>, and excellent spectral stability. Significantly, the electroluminescence spectrum represents CIE 1931 color coordinates of (0.71, 0.29), which meets the recommendation 2020 standard (0.708, 0.292). The findings provide useful guidelines for the rational design of new organic spacer cations for RPPs with high performance.</p>}},
  author       = {{Qing, Jian and Ramesh, Sankaran and Liu, Xiao-Ke and Wang, Heyong and Yu, Hongling and Kuang, Chaoyang and Hou, Lintao and Zhang, Wenjing and Sum, Tze Chien and Gao, Feng}},
  issn         = {{0169-4332}},
  keywords     = {{Electroluminescence; Light-emitting diodes; Ruddlesden-Popper perovskites; Spacer cations}},
  language     = {{eng}},
  month        = {{04}},
  publisher    = {{Elsevier}},
  series       = {{Applied Surface Science}},
  title        = {{Spacer cation engineering in Ruddlesden-Popper perovskites for efficient red light-emitting diodes with recommendation 2020 color coordinates}},
  url          = {{http://dx.doi.org/10.1016/j.apsusc.2023.156454}},
  doi          = {{10.1016/j.apsusc.2023.156454}},
  volume       = {{616}},
  year         = {{2023}},
}