Enhancing two-dimensional perovskite photodetector performance through balancing carrier density and directional transport

doi:10.1039/d2ta04288f

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	Enhancing two-dimensional perovskite photodetector performance through balancing carrier density and directional transport
	T. Huang; Z. C. Zhu; C. Zhao; W. C. Kong; X. H. Chen; R. Y. Li; Z. Yu; Z. M. Shi; D. B. Li; B. Yang and W. L. Yu
刊名	Journal of Materials Chemistry A
	2022
卷号	10 期号:39 页码:21044-21052
ISSN号	2050-7488
DOI	10.1039/d2ta04288f
英文摘要	Recently, two-dimensional (2D) Ruddlesden-Popper perovskites have attracted extensive attention in the research society owing to their unique organic and inorganic layered structure induced superb stability. However, the quantum confinement effect and dielectric confinement effect caused by the layered structure of 2D perovskites limit the carrier transport and further hinder performance improvement of 2D perovskite optoelectronic devices. To resolve this problem, we have adjusted carrier density and carrier lateral transport in 2D perovskites by a layer optimization strategy. A series of 2D perovskite PEA(2)MA((n-1))Pb(n)I(3n+1) single crystals with varying layers (n = 1-5) have been synthesized by an in situ reverse temperature crystallization procedure, and ultra-high efficiency lateral structured photodetectors have been achieved. When n is 4, the photodetector shows the highest responsivity of 3077 A W-1 which is over 20 times higher than previous reports. A record external quantum efficiency of 7.2 x 10(6)% is also achieved. The density functional theory calculations also confirm that directional migration of perovskite carriers is optimal when the layer number of the 2D perovskite PEA(2)MA((n-1))Pb(n)I(3n+1) is 4. This research shows that the layer number n is a key parameter in tuning the carrier density and lateral transport properties of the 2D PEA(2)MA((n-1))Pb(n)I(3n+1) perovskite, and a balance between these two parameters can be achieved when n is 4. This work is instructive for the fabrication of high-performance 2D perovskite optoelectronic devices.
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语种	英语
内容类型	期刊论文
源URL	[http://ir.ciomp.ac.cn/handle/181722/66631]
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	T. Huang,Z. C. Zhu,C. Zhao,et al. Enhancing two-dimensional perovskite photodetector performance through balancing carrier density and directional transport[J]. Journal of Materials Chemistry A,2022,10(39):21044-21052.
APA	T. Huang.,Z. C. Zhu.,C. Zhao.,W. C. Kong.,X. H. Chen.,...&B. Yang and W. L. Yu.(2022).Enhancing two-dimensional perovskite photodetector performance through balancing carrier density and directional transport.Journal of Materials Chemistry A,10(39),21044-21052.
MLA	T. Huang,et al."Enhancing two-dimensional perovskite photodetector performance through balancing carrier density and directional transport".Journal of Materials Chemistry A 10.39(2022):21044-21052.