利用聚偏氟乙烯-三氟乙烯掺杂缺陷钝化抑制噪声的灵敏自供电过氧化物光电探测器

IF 5.1 2区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Yuping Liu, Zhirong Liu, Zhiguo Zhang, Junyi Huang, Xiongjie Li, Haixuan Yu, Yan Shen, Mingkui Wang and Guoli Tu
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引用次数: 0

摘要

近年来,自供电型包晶体光电探测器(PD)的快速发展受到了溶液加工包晶体多晶薄膜中存在的大量缺陷的阻碍,这些缺陷严重影响了器件的性能。这些缺陷对器件噪声的影响尤其令人担忧,而噪声是直接影响探测器灵敏度的关键参数。本研究提出在 FA0.9MA0.05Cs0.05PbI3 包晶前驱体溶液中加入聚偏氟乙烯-三氟乙烯(PVT)添加剂,以缓解缺陷形成并提高探测器灵敏度。通过将 PVT 浓度优化至 0.05 mg L-1,光电探测器 (PD) 得到了显著改善,在零偏压下实现了低噪声功率谱密度(0.1 pA Hz-1/2)和暗电流密度(2.12 nA cm-2)。通过同时对浅层缺陷进行 PVT 钝化,该器件的缺陷密度明显降低了一个数量级。此外,该 PD 在 700 nm 波长处显示出很高的特定检测率(D* = 2.8 × 1013 jones),线性动态范围超过 101 dB。这项研究不仅加深了我们对噪声抑制机制的理解,还揭示了高灵敏度 PD 在实时心率监测中的潜在应用,为人类健康监测技术的重大进步带来了希望。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

A sensitive self-powered perovskite photodetector via noise suppression with poly(vinylidene fluoride–trifluoroethylene) doping for defect passivation†

A sensitive self-powered perovskite photodetector via noise suppression with poly(vinylidene fluoride–trifluoroethylene) doping for defect passivation†

A sensitive self-powered perovskite photodetector via noise suppression with poly(vinylidene fluoride–trifluoroethylene) doping for defect passivation†

The rapid advancement of self-powered perovskite photodetectors (PDs) in recent years has been hindered by numerous defects present in solution-processed perovskite polycrystalline films, significantly impacting device performance. Of particular concern is the influence of these defects on device noise, a critical parameter directly affecting detector sensitivity. This study proposes the incorporation of poly(vinylidene fluoride–trifluoroethylene) (PVT) additives into FA0.9MA0.05Cs0.05PbI3 perovskite precursor solutions to alleviate defect formation and enhance detector sensitivity. By optimizing the PVT concentration to 0.05 mg L−1, the photodetector (PD) demonstrates remarkable improvement, achieving a low noise power spectral density (0.1 pA Hz−1/2) and dark current density (2.12 nA cm−2) at zero bias. The device exhibits a notable decrease in defect density by an order of magnitude through the concurrent passivation of shallow-level defects with PVT. Additionally, the PD shows a high specific detection rate (D* = 2.8 × 1013 jones) at 700 nm, accompanied by a linear dynamic range exceeding 101 dB. This research not only advances our understanding of noise suppression mechanisms but also unveils the potential application of high-sensitivity PDs for real-time heart rate monitoring, showing promise for significant advancements in human health monitoring technology.

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来源期刊
Journal of Materials Chemistry C
Journal of Materials Chemistry C MATERIALS SCIENCE, MULTIDISCIPLINARY-PHYSICS, APPLIED
CiteScore
10.80
自引率
6.20%
发文量
1468
期刊介绍: The Journal of Materials Chemistry is divided into three distinct sections, A, B, and C, each catering to specific applications of the materials under study: Journal of Materials Chemistry A focuses primarily on materials intended for applications in energy and sustainability. Journal of Materials Chemistry B specializes in materials designed for applications in biology and medicine. Journal of Materials Chemistry C is dedicated to materials suitable for applications in optical, magnetic, and electronic devices. Example topic areas within the scope of Journal of Materials Chemistry C are listed below. This list is neither exhaustive nor exclusive. Bioelectronics Conductors Detectors Dielectrics Displays Ferroelectrics Lasers LEDs Lighting Liquid crystals Memory Metamaterials Multiferroics Photonics Photovoltaics Semiconductors Sensors Single molecule conductors Spintronics Superconductors Thermoelectrics Topological insulators Transistors
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