Self-Stabilized Quasi-2D Perovskite with an Ion-Migration-Inhibition Ligand for Pure Green LEDs

Zhang, Dezhong1; Liu, Chunyu1,2; Sun, Jiayun1,3; Xiong, Qi1; Xiao, Xiangtian1; Li, Dongyu1; Lyu, Benzheng1; Su, Haibin4; Choy, Wallace C. H.1

2024-02-23

10.1021/acsenergylett.3c02418

ACS ENERGY LETTERS   影响因子和分区

2380-8195

Perovskite light-emitting diodes (PeLEDs) have recently achieved a great breakthrough in external quantum efficiency (EQE). However, the operational stability of pure primary color PeLEDs lags far behind because of serious ion migration. Herein, a self-stabilized quasi-2D perovskite is constructed with a strategically synthesized ion-migration-inhibition ligand ((IMI)ligand) to realize highly stable and efficient pure green PeLEDs approaching the standard green light of Rec. 2020. The( IMI)ligand takes the role to not only eliminate migration pathways and anchor halide ions to suppress the ion migration but to also further enhance the crystalline orientation and energy transfer in quasi-2D perovskites. Meanwhile, the self-stabilized quasi-2D perovskite overcomes the degradation of electrical performance caused by conventional exogenous passivation additives. Ultimately, the figure of merit of the pure green quasi-2D PeLEDs is at least double that of previous works. The devices achieve an EQE of 26.2% and operational stability of 920 min at initial luminance of 1000 cd m(-2).

SCI ; EI

英语

其他

University Grant Council of the University of Hong Kong Grants["202011159254","202111159113"] ; General Research Fund["17211220","17200021","17200823"] ; Research Grants Council (RGC) of Hong Kong Special Administrative Region, China[C7035-20G]

Chemistry ; Electrochemistry ; Energy & Fuels ; Science & Technology - Other Topics ; Materials Science

Chemistry, Physical ; Electrochemistry ; Energy & Fuels ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:001175786600001

AMER CHEMICAL SOC

Web of Science

1.Univ Hong Kong, Dept Elect & Elect Engn, Hong Kong 000000, Peoples R China
2.Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, Changchun 130012, Peoples R China
3.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
4.Hong Kong Univ Sci & Technol, Dept Chem, Hong Kong 000000, Peoples R China

Zhang, Dezhong,Liu, Chunyu,Sun, Jiayun,et al. Self-Stabilized Quasi-2D Perovskite with an Ion-Migration-Inhibition Ligand for Pure Green LEDs[J]. ACS ENERGY LETTERS,2024,9(3).

Zhang, Dezhong.,Liu, Chunyu.,Sun, Jiayun.,Xiong, Qi.,Xiao, Xiangtian.,...&Choy, Wallace C. H..(2024).Self-Stabilized Quasi-2D Perovskite with an Ion-Migration-Inhibition Ligand for Pure Green LEDs.ACS ENERGY LETTERS,9(3).

Zhang, Dezhong,et al."Self-Stabilized Quasi-2D Perovskite with an Ion-Migration-Inhibition Ligand for Pure Green LEDs".ACS ENERGY LETTERS 9.3(2024).