Synergistic Effect of Ionic Liquid and Embedded QDs on 2D Ferroelectric Perovskite Films with Narrow Phase Distribution for Self-Powered and Broad-Band Photodetectors.

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2024-09-18 Epub Date: 2024-09-04 DOI:10.1021/acs.nanolett.4c03143

Linjuan Guo, Xiaoran Yang, Yu Liang, Zihao Wu, Xingyuan San, Zhenguang Wang, Leipeng Li, Zhenyang Liu, Jianhui Chen, Shufang Wang, Xuning Zhang, Caofeng Pan, Zheng Yang

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Abstract

2D layered metal halide perovskites (MHPs) are a potential material for fabricating self-powered photodetectors (PDs). Nevertheless, 2D MHPs produced via solution techniques frequently exhibit multiple quantum wells, leading to notable degradation in the device performance. Besides, the wide band gap in 2D perovskites limits their potential for broad-band photodetection. Integrating narrow-band gap materials with perovskite matrices is a viable strategy for broad-band PDs. In this study, the use of methylamine acetate (MAAc) as an additive in 2D perovskite precursors can effectively control the width of the quantum wells (QWs). The amount of MAAc greatly affects the phase purity. Subsequently, PbSe QDs were embedded into the 2D perovskite matrix with a broadened absorption spectrum and no negative effects on ferroelectric properties. PM6:Y6 was combined with the hybrid ferroelectric perovskite films to create a self-powered and broad-band PD with enhanced performance due to a ferro-pyro-phototronic effect, reaching a peak responsivity of 2.4 A W^-1 at 940 nm.

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离子液体和嵌入式 QDs 对具有窄相分布的二维铁电 Perovskite 薄膜的协同效应，用于自供电和宽带光电探测器。

二维层状金属卤化物过氧化物（MHPs）是制造自供电光电探测器（PDs）的潜在材料。然而，通过溶液技术生产的二维 MHP 通常会出现多个量子阱，从而导致器件性能显著下降。此外，二维过氧化物的宽带隙也限制了其宽带光电探测的潜力。将窄带隙材料与包晶基质相结合是实现宽带光电器件的可行策略。在本研究中，使用醋酸甲胺（MAAc）作为二维包晶前驱体的添加剂可有效控制量子阱（QW）的宽度。MAAc 的用量对相纯度有很大影响。随后，PbSe QDs 被嵌入到二维包晶基质中，其吸收光谱被拓宽，且对铁电特性没有负面影响。PM6:Y6 与混合铁电包晶石薄膜相结合，产生了一种自供电宽带 PD，由于铁电-青电-光电效应，其性能得到了提高，在 940 纳米波长处的峰值响应率达到了 2.4 A W-1。

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来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

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