Efficient Polycrystalline Single‐Cation Perovskite Light‐Emitting Diodes by Simultaneous Intracrystal and Interfacial Defect Passivation Article Swipe
Hobeom Kim
,
Jung‐Min Heo
,
Christoph Wolf
,
Young‐Hoon Kim
,
Seong‐Chul Lee
,
Eojin Yoon
,
Geon‐Hui Lee
,
Kyung Yeon Jang
,
Jun‐Mo Park
,
Joo Sung Kim
,
Min‐Ho Park
,
Su‐Hun Jeong
,
Himchan Cho
,
Tae Hee Han
,
Emad Oveisi
,
Mohammad Khaja Nazeeruddin
,
Tae‐Woo Lee
·
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.1002/smll.202405272
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.1002/smll.202405272
Polycrystalline perovskite light‐emitting diodes (PeLEDs) have shown great promise with high efficiency and easy processability. However, PeLEDs using single‐cation polycrystalline perovskite emitters have demonstrated low efficiency due to defects within the grains and at the interfaces between the perovskite layer and the charge injection contact. Thus, simultaneous defect engineering of perovskites to suppress exciton loss within the grains and at the interfaces is crucial for achieving high efficiency in PeLEDs. Here, 1,8‐octanedithiol which is a strong nucleophile, is used to increase the luminescence efficiency of a single‐cation perovskite by suppressing non‐radiative recombination within the grains of their polycrystalline emitter film as well as at their interface with an anode. The dithiol additive performs a multifunctional role in defect passivation, spatial confinement of excitons, and prevention of exciton quenching at the interface between the perovskite layer and the underlying hole‐injection layer. Photoluminescence studies demonstrate that incorporating the dithiol additive significantly enhances the charge carrier dynamics in perovskites, resulting in an external quantum efficiency (EQE) of up to 23.46% even in a simplified PeLED that does not use a hole‐injection layer. This represents the highest level of EQE achieved among devices utilizing polycrystalline single‐cation perovskites.
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Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1002/smll.202405272
- OA Status
- green
- Cited By
- 3
- References
- 48
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4402841841
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W4402841841Canonical identifier for this work in OpenAlex
- DOI
-
https://doi.org/10.1002/smll.202405272Digital Object Identifier
- Title
-
Efficient Polycrystalline Single‐Cation Perovskite Light‐Emitting Diodes by Simultaneous Intracrystal and Interfacial Defect PassivationWork title
- Type
-
articleOpenAlex work type
- Language
-
enPrimary language
- Publication year
-
2024Year of publication
- Publication date
-
2024-09-25Full publication date if available
- Authors
-
Hobeom Kim, Jung‐Min Heo, Christoph Wolf, Young‐Hoon Kim, Seong‐Chul Lee, Eojin Yoon, Geon‐Hui Lee, Kyung Yeon Jang, Jun‐Mo Park, Joo Sung Kim, Min‐Ho Park, Su‐Hun Jeong, Himchan Cho, Tae Hee Han, Emad Oveisi, Mohammad Khaja Nazeeruddin, Tae‐Woo LeeList of authors in order
- Landing page
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https://doi.org/10.1002/smll.202405272Publisher landing page
- Open access
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YesWhether a free full text is available
- OA status
-
greenOpen access status per OpenAlex
- OA URL
-
https://www.ncbi.nlm.nih.gov/pmc/articles/11707566Direct OA link when available
- Concepts
-
Passivation, Materials science, Perovskite (structure), Photoluminescence, Crystallite, Optoelectronics, Quantum efficiency, Exciton, Light-emitting diode, Luminescence, Diode, Carrier lifetime, Layer (electronics), Nanotechnology, Chemistry, Condensed matter physics, Crystallography, Metallurgy, Physics, SiliconTop concepts (fields/topics) attached by OpenAlex
- Cited by
-
3Total citation count in OpenAlex
- Citations by year (recent)
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2025: 3Per-year citation counts (last 5 years)
- References (count)
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48Number of works referenced by this work
- Related works (count)
-
10Other works algorithmically related by OpenAlex
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