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Article: Ionic Liquid Passivation for High‐Performance Sky‐Blue Quasi‐2D Perovskite Light‐Emitting Diodes

TitleIonic Liquid Passivation for High‐Performance Sky‐Blue Quasi‐2D Perovskite Light‐Emitting Diodes
Authors
Keywordsdefect passivation
ionic liquids
sky-blue perovskite light-emitting diodes
Issue Date20-Mar-2023
PublisherWiley
Citation
Advanced Optical Materials, 2023, v. 11, n. 10 How to Cite?
Abstract

Great progress has been made in high-performance perovskite light-emitting diodes (PeLEDs). However, the external quantum efficiency (EQE) of blue PeLEDs still lags. Particularly, defects are inevitable in solution-processed perovskite films, which inhibit the efficient radiative recombination in blue PeLEDs. Herein, a facile ionic liquid (IL, 1,3-dimethyl-3-imidazolium hexafluorophosphate) post-treatment on the as-fabricated quasi-2D perovskite film is reported, to passivate the uncoordinated Pb through the strong interaction with IL. The IL-assisted perovskite film demonstrates a great enhancement of radiative recombination efficiency, and the photoluminescence quantum yield of the film increases from 35.7% to 74.6%. IL post-treatment also adjusts the energy level of perovskite film and enhances the hole injection in PeLED. As a result, the peak EQE of the sky-blue quasi-2D PeLED is improved from 4.0% to 9.0%, while the turn-on voltage is reduced from 3.3 to 3.0 V. This work contributes to a feasible and effective approach for improving the quality of blue quasi-2D perovskites and enhancing the efficiency of blue PeLEDs.


Persistent Identifierhttp://hdl.handle.net/10722/338587
ISSN
2023 Impact Factor: 8.0
2023 SCImago Journal Rankings: 2.216
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorSun, Jiayun-
dc.contributor.authorRen, Zhenwei-
dc.contributor.authorWang, Zhaojin-
dc.contributor.authorWang, Haoran-
dc.contributor.authorWu, Dan-
dc.contributor.authorSun, Xiao Wei-
dc.contributor.authorChoy, Wallace C H-
dc.contributor.authorWang, Kai -
dc.date.accessioned2024-03-11T10:30:01Z-
dc.date.available2024-03-11T10:30:01Z-
dc.date.issued2023-03-20-
dc.identifier.citationAdvanced Optical Materials, 2023, v. 11, n. 10-
dc.identifier.issn2195-1071-
dc.identifier.urihttp://hdl.handle.net/10722/338587-
dc.description.abstract<p>Great progress has been made in high-performance perovskite light-emitting diodes (PeLEDs). However, the external quantum efficiency (EQE) of blue PeLEDs still lags. Particularly, defects are inevitable in solution-processed perovskite films, which inhibit the efficient radiative recombination in blue PeLEDs. Herein, a facile ionic liquid (IL, 1,3-dimethyl-3-imidazolium hexafluorophosphate) post-treatment on the as-fabricated quasi-2D perovskite film is reported, to passivate the uncoordinated Pb through the strong interaction with IL. The IL-assisted perovskite film demonstrates a great enhancement of radiative recombination efficiency, and the photoluminescence quantum yield of the film increases from 35.7% to 74.6%. IL post-treatment also adjusts the energy level of perovskite film and enhances the hole injection in PeLED. As a result, the peak EQE of the sky-blue quasi-2D PeLED is improved from 4.0% to 9.0%, while the turn-on voltage is reduced from 3.3 to 3.0 V. This work contributes to a feasible and effective approach for improving the quality of blue quasi-2D perovskites and enhancing the efficiency of blue PeLEDs.<br></p>-
dc.languageeng-
dc.publisherWiley-
dc.relation.ispartofAdvanced Optical Materials-
dc.subjectdefect passivation-
dc.subjectionic liquids-
dc.subjectsky-blue perovskite light-emitting diodes-
dc.titleIonic Liquid Passivation for High‐Performance Sky‐Blue Quasi‐2D Perovskite Light‐Emitting Diodes-
dc.typeArticle-
dc.identifier.doi10.1002/adom.202202721-
dc.identifier.scopuseid_2-s2.0-85150291447-
dc.identifier.volume11-
dc.identifier.issue10-
dc.identifier.eissn2195-1071-
dc.identifier.isiWOS:000953358100001-
dc.identifier.issnl2195-1071-

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