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Defect Passivation Using a Phosphonic Acid Surface Modifier for Efficient RP Perovskite Blue-Light-Emitting Diodes

Mishra, Jayanta Kumar ; Yantara, Natalia ; Kanwat, Anil ; Furuhashi, Tomoki ; Ramesh, Sankaran LU orcid ; Salim, Teddy ; Jamaludin, Nur Fadilah ; Febriansyah, Benny ; Ooi, Zi En and Mhaisalkar, Subodh , et al. (2022) In ACS applied materials & interfaces 14(30). p.34238-34246
Abstract

Defect management strategies are vital for enhancing the performance of perovskite-based optoelectronic devices, such as perovskite-based light-emitting diodes (PeLEDs). As additives can fucntion both as acrystallization modifier and/or defect passivator, a thorough study on the roles of additives is essential, especially for blue emissive Pe-LEDs, where the emission is strictly controlled by the n-domain distribution of the Ruddlesden-Popper (RP, L2An-1PbnX3n+1, where L refers to a bulky cation, while A and X are monovalent cation, and halide anion, respectively) perovskite films. Of the various additives that are available, octyl phosphonic acid (OPA) is of immense interest because of its ability to bind with uncoordinated Pb2+ (... (More)

Defect management strategies are vital for enhancing the performance of perovskite-based optoelectronic devices, such as perovskite-based light-emitting diodes (PeLEDs). As additives can fucntion both as acrystallization modifier and/or defect passivator, a thorough study on the roles of additives is essential, especially for blue emissive Pe-LEDs, where the emission is strictly controlled by the n-domain distribution of the Ruddlesden-Popper (RP, L2An-1PbnX3n+1, where L refers to a bulky cation, while A and X are monovalent cation, and halide anion, respectively) perovskite films. Of the various additives that are available, octyl phosphonic acid (OPA) is of immense interest because of its ability to bind with uncoordinated Pb2+ ( notorious for nonradiative recombination) and therefore passivates them. Here, with the help of various spectroscopic techniques, such as X-ray photon-spectroscopy (XPS), Fourier-transform infrared spectroscopy (FTIR), and photoluminescence quantum yield (PLQY) measurements, we demonstrate the capability of OPA to bind and passivate unpaired Pb2+ defect sites. Modification to crystallization promoting higher n-domain formation is also observed from steady-state and transient absorption (TA) measurements. With OPA treatment, both the PLQY and EQE of the corresponding PeLED showed improvements up to 53% and 3.7% at peak emission wavelength of 485 nm, respectively.

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publishing date
type
Contribution to journal
publication status
published
subject
keywords
crystallization modulator, halide perovskites, light emitting diode, quasi 2D perovskite, Ruddlesden−Popper perovskite
in
ACS applied materials & interfaces
volume
14
issue
30
pages
9 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • scopus:85135596421
  • pmid:35604015
ISSN
1944-8244
DOI
10.1021/acsami.2c00899
language
English
LU publication?
no
id
69a06e6a-f31f-4ebd-91c3-6f073b2bd352
date added to LUP
2023-02-15 22:00:19
date last changed
2024-04-18 18:55:12
@article{69a06e6a-f31f-4ebd-91c3-6f073b2bd352,
  abstract     = {{<p>Defect management strategies are vital for enhancing the performance of perovskite-based optoelectronic devices, such as perovskite-based light-emitting diodes (PeLEDs). As additives can fucntion both as acrystallization modifier and/or defect passivator, a thorough study on the roles of additives is essential, especially for blue emissive Pe-LEDs, where the emission is strictly controlled by the n-domain distribution of the Ruddlesden-Popper (RP, L2An-1PbnX3n+1, where L refers to a bulky cation, while A and X are monovalent cation, and halide anion, respectively) perovskite films. Of the various additives that are available, octyl phosphonic acid (OPA) is of immense interest because of its ability to bind with uncoordinated Pb2+ ( notorious for nonradiative recombination) and therefore passivates them. Here, with the help of various spectroscopic techniques, such as X-ray photon-spectroscopy (XPS), Fourier-transform infrared spectroscopy (FTIR), and photoluminescence quantum yield (PLQY) measurements, we demonstrate the capability of OPA to bind and passivate unpaired Pb2+ defect sites. Modification to crystallization promoting higher n-domain formation is also observed from steady-state and transient absorption (TA) measurements. With OPA treatment, both the PLQY and EQE of the corresponding PeLED showed improvements up to 53% and 3.7% at peak emission wavelength of 485 nm, respectively.</p>}},
  author       = {{Mishra, Jayanta Kumar and Yantara, Natalia and Kanwat, Anil and Furuhashi, Tomoki and Ramesh, Sankaran and Salim, Teddy and Jamaludin, Nur Fadilah and Febriansyah, Benny and Ooi, Zi En and Mhaisalkar, Subodh and Sum, Tze Chien and Hippalgaonkar, Kedar and Mathews, Nripan}},
  issn         = {{1944-8244}},
  keywords     = {{crystallization modulator; halide perovskites; light emitting diode; quasi 2D perovskite; Ruddlesden−Popper perovskite}},
  language     = {{eng}},
  month        = {{08}},
  number       = {{30}},
  pages        = {{34238--34246}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{ACS applied materials & interfaces}},
  title        = {{Defect Passivation Using a Phosphonic Acid Surface Modifier for Efficient RP Perovskite Blue-Light-Emitting Diodes}},
  url          = {{http://dx.doi.org/10.1021/acsami.2c00899}},
  doi          = {{10.1021/acsami.2c00899}},
  volume       = {{14}},
  year         = {{2022}},
}