中文版 | English
Title

Microcavity Design Upping Light Extraction Efficiency over 50% in High-Index Perovskite Light-Emitting Diodes

Author
Corresponding AuthorWang, Kai; Sun, Xiao Wei; Choy, Wallace C. H.
Publication Years
2023-09-01
DOI
Source Title
ISSN
2195-1071
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 & AP;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.","The microcavity effect in perovskite light-emitting diodes is enhanced by a semitransparent silver layer. The device structure is optimized based on the microcavity, resulting in a high light extraction efficiency of close to 50%. The experiment also verified the simulation, with an efficiency improvement from 8.5% to 14.4%.image"]
Keywords
URL[Source Record]
Indexed By
Language
English
SUSTech Authorship
Corresponding
Funding Project
This research was supported by the feed funds (Grant Nos. 202011159254 and 202111159113) from the University Grant Council of the University of Hong Kong; the General Research Fund (Grant Nos. 17201819, 17211220, and 17200021); the Collaborative Research F["202011159254","202111159113"] ; University Grant Council of the University of Hong Kong["17201819","17211220","17200021"] ; (C7035-20G) from Hong Kong Special Administrative Region, China["22005131","52173169","62122034","61875082"] ; Key-Area Research and Development Program of Guangdong Province["2019B010925001","2019B010924001"] ; National Key Research and Development Program of China["2022YFB3606504","2022YFB3602903"] ; Guangdong University Key Laboratory for Advanced Quantum Dot Displays[2017KSYS007] ; Shenzhen Innovation Project["JCYJ20210324104413036","JCYJ20220818100411025"]
WOS Research Area
Materials Science ; Optics
WOS Subject
Materials Science, Multidisciplinary ; Optics
WOS Accession No
WOS:001073677000001
Publisher
Data Source
Web of Science
Citation statistics
Cited Times [WOS]:0
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/575817
DepartmentSouthern University of Science and Technology
工学院_电子与电气工程系
Affiliation
1.Univ Hong Kong, Dept Elect & Elect Engn, Pokfulam Rd, Hong Kong 999077, Peoples R China
2.Southern Univ Sci & Technol, Guangdong Univ, Key Lab Energy Convers & Storage Technol SUSTech, Inst Nanosci & Applicat,Minist Educ,Key Lab Adv Qu, Shenzhen 518055, Peoples R China
3.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
First Author AffilicationSouthern University of Science and Technology;  Department of Electrical and Electronic Engineering
Corresponding Author AffilicationSouthern University of Science and Technology;  Department of Electrical and Electronic Engineering
First Author's First AffilicationSouthern University of Science and Technology
Recommended Citation
GB/T 7714
Mei, Guanding,Xiao, Xiangtian,Ahmad, Sajjad,et al. Microcavity Design Upping Light Extraction Efficiency over 50% in High-Index Perovskite Light-Emitting Diodes[J]. ADVANCED OPTICAL MATERIALS,2023.
APA
Mei, Guanding.,Xiao, Xiangtian.,Ahmad, Sajjad.,Lin, Hong.,Tan, Yangzhi.,...&Choy, Wallace C. H..(2023).Microcavity Design Upping Light Extraction Efficiency over 50% in High-Index Perovskite Light-Emitting Diodes.ADVANCED OPTICAL MATERIALS.
MLA
Mei, Guanding,et al."Microcavity Design Upping Light Extraction Efficiency over 50% in High-Index Perovskite Light-Emitting Diodes".ADVANCED OPTICAL MATERIALS (2023).
Files in This Item:
There are no files associated with this item.
Related Services
Fulltext link
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Export to Excel
Export to Csv
Altmetrics Score
Google Scholar
Similar articles in Google Scholar
[Mei, Guanding]'s Articles
[Xiao, Xiangtian]'s Articles
[Ahmad, Sajjad]'s Articles
Baidu Scholar
Similar articles in Baidu Scholar
[Mei, Guanding]'s Articles
[Xiao, Xiangtian]'s Articles
[Ahmad, Sajjad]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Mei, Guanding]'s Articles
[Xiao, Xiangtian]'s Articles
[Ahmad, Sajjad]'s Articles
Terms of Use
No data!
Social Bookmark/Share
No comment.

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.