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Article: Microcavity Design Upping Light Extraction Efficiency over 50% in High‐Index Perovskite Light‐Emitting Diodes

TitleMicrocavity Design Upping Light Extraction Efficiency over 50% in High‐Index Perovskite Light‐Emitting Diodes
Authors
Keywordsexternal quantum efficiency
light extraction efficiency
light-emitting diodes
microcavity
perovskites
Issue Date29-Sep-2023
PublisherWiley
Citation
Advanced Optical Materials, 2023, v. 11, n. 22 How to Cite?
Abstract

Perovskite light-emitting diodes (PeLEDs) are promising candidates for lighting and display applications. However, perovskites usually have a relatively high refractive index compared to organic semiconductors, causing a lower optical efficiency due to a narrower escape cone. In this work, the theoretical analysis shows that the microcavity effect enables PeLEDs to achieve a light extraction efficiency of 51%, much higher than the ≈20% estimated by the classical theory. Besides the interference in the microcavity, the efficiency improvement is also attributed to the low surface plasmon loss and a high ratio of horizontal dipoles under the Purcell effect. In a microcavity PeLED, a horizontal dipole shows three times the improvement in the Purcell factor of a vertical dipole, making the horizontal dipole with high efficiency contribute 86% of light output. Moreover, the experiment shows that the microcavity can increase the external quantum efficiency by 70%. A narrower spectrum and shorter photoluminescence lifetime are also observed. These phenomena are attributed to the simultaneous enhancement of light extraction efficiency and internal quantum efficiency. This work reveals the importance of microcavity design and provides guidance to break through the classical efficiency limit and achieve high-efficiency PeLEDs.


Persistent Identifierhttp://hdl.handle.net/10722/338583
ISSN
2023 Impact Factor: 8.0
2023 SCImago Journal Rankings: 2.216
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorMei, Guanding-
dc.contributor.authorXiao, Xiangtian-
dc.contributor.authorAhmad, Sajjad-
dc.contributor.authorLin, Hong-
dc.contributor.authorTan, Yangzhi-
dc.contributor.authorWang, Kai-
dc.contributor.authorSun, Xiao Wei-
dc.contributor.authorChoy, Wallace CH-
dc.date.accessioned2024-03-11T10:29:59Z-
dc.date.available2024-03-11T10:29:59Z-
dc.date.issued2023-09-29-
dc.identifier.citationAdvanced Optical Materials, 2023, v. 11, n. 22-
dc.identifier.issn2195-1071-
dc.identifier.urihttp://hdl.handle.net/10722/338583-
dc.description.abstract<p>Perovskite light-emitting diodes (PeLEDs) are promising candidates for lighting and display applications. However, perovskites usually have a relatively high refractive index compared to organic semiconductors, causing a lower optical efficiency due to a narrower escape cone. In this work, the theoretical analysis shows that the microcavity effect enables PeLEDs to achieve a light extraction efficiency of 51%, much higher than the ≈20% estimated by the classical theory. Besides the interference in the microcavity, the efficiency improvement is also attributed to the low surface plasmon loss and a high ratio of horizontal dipoles under the Purcell effect. In a microcavity PeLED, a horizontal dipole shows three times the improvement in the Purcell factor of a vertical dipole, making the horizontal dipole with high efficiency contribute 86% of light output. Moreover, the experiment shows that the microcavity can increase the external quantum efficiency by 70%. A narrower spectrum and shorter photoluminescence lifetime are also observed. These phenomena are attributed to the simultaneous enhancement of light extraction efficiency and internal quantum efficiency. This work reveals the importance of microcavity design and provides guidance to break through the classical efficiency limit and achieve high-efficiency PeLEDs.<br></p>-
dc.languageeng-
dc.publisherWiley-
dc.relation.ispartofAdvanced Optical Materials-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.subjectexternal quantum efficiency-
dc.subjectlight extraction efficiency-
dc.subjectlight-emitting diodes-
dc.subjectmicrocavity-
dc.subjectperovskites-
dc.titleMicrocavity Design Upping Light Extraction Efficiency over 50% in High‐Index Perovskite Light‐Emitting Diodes-
dc.typeArticle-
dc.identifier.doi10.1002/adom.202300912-
dc.identifier.scopuseid_2-s2.0-85172665976-
dc.identifier.volume11-
dc.identifier.issue22-
dc.identifier.eissn2195-1071-
dc.identifier.isiWOS:001073677000001-
dc.identifier.issnl2195-1071-

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