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Efficient Inorganic Perovskite Light-Emitting Diodes by Inducing Grain Arrangement via a Multifunctional Interface
J. Ou; X. Guo; Y. Lv; Y. Fan; Y. Li; D. Zou; Z. Bao; L. Song and X. Liu
2021
Source PublicationACS Applied Materials and Interfaces
ISSN19448244
Volume13Issue:50Pages:60571-60580
AbstractAccumulating evidence shows that metal halide perovskite light-emitting diodes (PeLEDs) are well-described to show broad application prospects in lighting and display due to the wide color gamut and high color purity. However, it is still a great challenge to prepare high-quality all-inorganic PeLEDs by a solution method. For example, it is difficult to obtain all-inorganic perovskite films with good crystallinity and high grain orientation because of too fast and uncontrollable crystallization of all-inorganic perovskite films. Here, we demonstrated a multifunctional interface of formamide (FA)-doped PEDOT:PSS, which improved the crystallinity of all-inorganic perovskite films by inducing grain arrangement. As a result, a highly crystalline, ordered, and defect-passivated CsPbBr3 film was obtained by the multiple roles of FA, and the CsPbBr3-based PeLED treated with FA achieved both high brightness and high efficiency: the peak external quantum efficiency (EQE) reaches 9.61%, and the maximum brightness is 185,000 cd/m2. In addition, Tween 80, used as a passivator of perovskite films, reduced the defect states and suppressed ion migration. Under the synergistic effect of FA interface treatment and Tween 80 passivation treatment, efficient CsPbBr3-based PeLEDs were obtained with an EQE of 15.02% and an operation lifetime of 182.5 min at an initial brightness of 1000 cd/m2, which is among the best reported lifetimes under high brightness. Our study provides a simple and effective strategy for the realization of all-inorganic PeLEDs with high efficiency, high brightness, and ultralong operation lifetime. 2021 American Chemical Society
DOI10.1021/acsami.1c15477
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Indexed BySCI ; EI
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Document Type期刊论文
Identifierhttp://ir.ciomp.ac.cn/handle/181722/65206
Collection中国科学院长春光学精密机械与物理研究所
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GB/T 7714
J. Ou,X. Guo,Y. Lv,et al. Efficient Inorganic Perovskite Light-Emitting Diodes by Inducing Grain Arrangement via a Multifunctional Interface[J]. ACS Applied Materials and Interfaces,2021,13(50):60571-60580.
APA J. Ou.,X. Guo.,Y. Lv.,Y. Fan.,Y. Li.,...&L. Song and X. Liu.(2021).Efficient Inorganic Perovskite Light-Emitting Diodes by Inducing Grain Arrangement via a Multifunctional Interface.ACS Applied Materials and Interfaces,13(50),60571-60580.
MLA J. Ou,et al."Efficient Inorganic Perovskite Light-Emitting Diodes by Inducing Grain Arrangement via a Multifunctional Interface".ACS Applied Materials and Interfaces 13.50(2021):60571-60580.
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