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

被引:4
作者
Mei, Guanding [1 ,2 ,3 ]
Xiao, Xiangtian [1 ,2 ,3 ]
Ahmad, Sajjad [1 ]
Lin, Hong [1 ]
Tan, Yangzhi [1 ,2 ,3 ]
Wang, Kai [2 ,3 ]
Sun, Xiao Wei [2 ,3 ]
Choy, Wallace C. H. [1 ]
机构
[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
基金
中国国家自然科学基金;
关键词
external quantum efficiency; light extraction efficiency; light-emitting diodes; microcavity; perovskites; INTERNAL QUANTUM EFFICIENCY; EMISSION; NANOCRYSTALS; FLUORESCENCE; PROGRESS;
D O I
10.1002/adom.202300912
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
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
引用
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页数:12
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共 82 条
  • [21] Gaspar D.J., 2015, OLED FUNDAMENTALS MA, V1st
  • [22] ANGULAR-DEPENDENCE OF THE EMISSION FROM A CONJUGATED POLYMER LIGHT-EMITTING DIODE - IMPLICATIONS FOR EFFICIENCY CALCULATIONS
    GREENHAM, NC
    FRIEND, RH
    BRADLEY, DDC
    [J]. ADVANCED MATERIALS, 1994, 6 (06) : 491 - 494
  • [23] Progress in halide-perovskite nanocrystals with near-unity photoluminescence quantum yield
    Gualdron-Reyes, Andres F.
    Masi, Sofia
    Mora-Sero, Ivan
    [J]. TRENDS IN CHEMISTRY, 2021, 3 (06): : 499 - 511
  • [24] Han SY, 2018, AM J HUM BIOL, V30, DOI [10.1002/ajhb.23086, 10.1002/adma.201705600]
  • [25] A Brief History of OLEDs-Emitter Development and Industry Milestones
    Hong, Gloria
    Gan, Xuemin
    Leonhardt, Celine
    Zhang, Zhen
    Seibert, Jasmin
    Busch, Jasmin M.
    Braese, Stefan
    [J]. ADVANCED MATERIALS, 2021, 33 (09)
  • [26] Pyridine-Carbonitrile-Carbazole-Based Delayed Fluorescence Materials with Highly Congested Structures and Excellent OLED Performance
    Jayakumar, Jayachandran
    Wu, Tien-Lin
    Huang, Min-Jie
    Huang, Pei-Yun
    Chou, Tsu-Yu
    Lin, Hao-Wu
    Cheng, Chien-Hong
    [J]. ACS APPLIED MATERIALS & INTERFACES, 2019, 11 (23) : 21042 - 21048
  • [27] Characterizing the Efficiency of Perovskite Solar Cells and Light-Emitting Diodes
    Jeong, Su-Hun
    Park, Jaehyeok
    Han, Tae-Hee
    Zhang, Fei
    Zhu, Kai
    Kim, Joo Sung
    Park, Min-Ho
    Reese, Matthew O.
    Yoo, Seunghyup
    Lee, Tae-Woo
    [J]. JOULE, 2020, 4 (06) : 1206 - 1235
  • [28] Halide Perovskite Light-Emitting Diode Technologies
    Ji, Kangyu
    Anaya, Miguel
    Abfalterer, Anna
    Stranks, Samuel D.
    [J]. ADVANCED OPTICAL MATERIALS, 2021, 9 (18)
  • [29] 2D/3D Heterojunction perovskite light-emitting diodes with tunable ultrapure blue emissions
    Jiang, Naizhong
    Wang, Zhibin
    Zheng, Yuanhui
    Guo, Qiang
    Niu, Weifan
    Zhang, Ruidan
    Huang, Feng
    Chen, Daqin
    [J]. NANO ENERGY, 2022, 97
  • [30] On the accurate characterization of quantum-dot light-emitting diodes for display applications
    Jin, Wangxiao
    Deng, Yunzhou
    Guo, Bingbing
    Lian, Yaxiao
    Zhao, Baodan
    Di, Dawei
    Sun, Xiaowei
    Wang, Kai
    Chen, Shuming
    Yang, Yixing
    Cao, Weiran
    Chen, Song
    Ji, Wenyu
    Yang, Xuyong
    Gao, Yuan
    Wang, Shuangpeng
    Shen, Huaibin
    Zhao, Jialong
    Qian, Lei
    Li, Fushan
    Jin, Yizheng
    [J]. NPJ FLEXIBLE ELECTRONICS, 2022, 6 (01)