气候变化领域集成服务门户(CCPortal): Ultrasensitive polarized-light photodetectors based on 2D hybrid perovskite ferroelectric crystals with a low detection limit

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DOI	10.1016/j.scib.2020.06.018
	Ultrasensitive polarized-light photodetectors based on 2D hybrid perovskite ferroelectric crystals with a low detection limit
	Wang J.; Liu Y.; Han S.; Ma Y.; Li Y.; Xu Z.; Luo J.; Hong M.; Sun Z.
发表日期	2021
ISSN	20959273
起始页码	158
结束页码	163
卷号	66 期号:2
英文摘要	Polarized-light photodetectors are the indispensable elements for practical optical and optoelectronic device applications. Two-dimensional (2D) hybrid perovskite ferroelectrics, in which the coupling of spontaneous polarization (Ps) and light favors the dissociation of photo-induced carriers, have taken a booming position within this portfolio. However, polarized-light photodetectors with a low detection-limit remain unexplored in this 2D ferroelectric family. In this work, the high-quality individual crystals of a 2D perovskite ferroelectric, BA2CsPb2Br7 (1, where BA+ is n-butylammonium), were used to fabricate ultrasensitive polarized-light detectors. Its unique bilayered structural motif results in quite strong electric and optical anisotropy with a large absorption ratio of αc/αa ≈ 3.2 (λ = 405 nm). Besides, the presence of ferroelectric Ps also endows high built-in electric field along the polar c-axis that favors photoelectric activities. Under an extremely low detectable limit of 40 nW/cm2, the detector of 1 exhibits a notable dichroism ratio (Iphc/Ipha ≈ 1.5), a large responsivity of ~39.5 mA/W and a specific detectivity of ~1.2 × 1012 Jones. Moreover, crystal-based devices of 1 also exhibit a fast response speed (~300 μs) and excellent anti-fatigue merits. This work highlights great potentials of hybrid perovskite ferroelectrics toward polarized-light photodetection. © 2020 Science China Press
关键词	Ferroelectric Hybrid perovskite Low detection limit Polarized-light detection
英文关键词	Crystals; Electric fields; Ferroelectricity; Light polarization; Perovskite; Photodetectors; Photons; Built-in electric fields; Ferroelectric crystal; Low detection limit; Specific detectivity; Spontaneous polarizations; Structural motifs; Two Dimensional (2 D); Ultra sensitives; Ferroelectric materials
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207588
作者单位	College of Chemistry, Fuzhou University, Fuzhou, 350116, China; State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
推荐引用方式 GB/T 7714	Wang J.,Liu Y.,Han S.,et al. Ultrasensitive polarized-light photodetectors based on 2D hybrid perovskite ferroelectric crystals with a low detection limit[J],2021,66(2).
APA	Wang J..,Liu Y..,Han S..,Ma Y..,Li Y..,...&Sun Z..(2021).Ultrasensitive polarized-light photodetectors based on 2D hybrid perovskite ferroelectric crystals with a low detection limit.Science Bulletin,66(2).
MLA	Wang J.,et al."Ultrasensitive polarized-light photodetectors based on 2D hybrid perovskite ferroelectric crystals with a low detection limit".Science Bulletin 66.2(2021).