Defect Passivation Using a Phosphonic Acid Surface Modifier for Efficient RP Perovskite Blue-Light-Emitting Diodes
(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.
(Less)
- author
- publishing date
- 2022-08-03
- 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}}, }