Synergistic morphology control and non-radiative defect passivation using a crown ether for efficient perovskite light-emitting devices

doi:10.1039/d0tc02062a

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	Synergistic morphology control and non-radiative defect passivation using a crown ether for efficient perovskite light-emitting devices
	L. Song,L. X. Huang,Y. S. Hu,X. Y. Guo,X. Y. Liu,C. Geng,S. Xu,N. N. Luan,W. G. Bi and L. S. Wang
	2020
发表期刊	Journal of Materials Chemistry C
ISSN	2050-7526
卷号	8 期号:29 页码:9986-9992
摘要	Controlling the nucleation process and forming small nanograins, as well as passivating defects at grain boundaries as the grain size becomes smaller, in one-step solution formed polycrystalline halide perovskites are of great importance for achieving efficient perovskite light-emitting diodes (PeLEDs). Here, a crown ether, 2-hydroxymethyl-12-crown-4 (HM12C4), is adopted as an additive and its influence on the photophysical and electroluminescent properties of a PeLED was investigated. It is found that HM12C4 can not only suppress PbBr(6)octahedron agglomeration in the precursor but also improve the wettability of the hole transport layer, resulting in a smoother dense perovskite film with smaller polycrystallites. Moreover, the retained HM12C4 in the perovskite film effectively passivated the defects at the grain boundaries and improved the photophysical and electroluminescent properties. Consequently, significantly enhanced electroluminescent performance was achieved with a low turn-on voltage of 2.3 V, a current efficiency of 17.2 cd A(-1), and an external quantum efficiency of 4.52%. Our findings reveal that crown ethers have great potential in exploiting high-performance PeLED, with significant implications for the further development of PeLEDs.
DOI	10.1039/d0tc02062a
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收录类别	SCI ; EI
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/64939
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	L. Song,L. X. Huang,Y. S. Hu,X. Y. Guo,X. Y. Liu,C. Geng,S. Xu,N. N. Luan,W. G. Bi and L. S. Wang. Synergistic morphology control and non-radiative defect passivation using a crown ether for efficient perovskite light-emitting devices[J]. Journal of Materials Chemistry C,2020,8(29):9986-9992.
APA	L. Song,L. X. Huang,Y. S. Hu,X. Y. Guo,X. Y. Liu,C. Geng,S. Xu,N. N. Luan,W. G. Bi and L. S. Wang.(2020).Synergistic morphology control and non-radiative defect passivation using a crown ether for efficient perovskite light-emitting devices.Journal of Materials Chemistry C,8(29),9986-9992.
MLA	L. Song,L. X. Huang,Y. S. Hu,X. Y. Guo,X. Y. Liu,C. Geng,S. Xu,N. N. Luan,W. G. Bi and L. S. Wang."Synergistic morphology control and non-radiative defect passivation using a crown ether for efficient perovskite light-emitting devices".Journal of Materials Chemistry C 8.29(2020):9986-9992.

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