High-speed, self-powered 2D-perovskite photodetectors with exceptional ambient stability enabled by planar nanocavity engineering

IF 31.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: R: Reports Pub Date : 2024-11-16 DOI:10.1016/j.mser.2024.100885

Murali Gedda , Haomin Song , Anil Reddy Pininti , Omar Alkhazragi , Hendrik Faber , Xiaoguang Tu , Husam N. Alshareef , Stefaan De Wolf , Boon S. Ooi , Thomas D. Anthopoulos , Qiaoqiang Gan

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引用次数: 0

Abstract

Advancements in photodetector (PD) technology are pivotal for the evolution of optical communication and imaging systems. Addressing the demands of these applications necessitates PDs that can deliver both high-speed response and high sensitivity. In this context, we introduce an innovative high-speed PD design utilizing ultrathin two-dimensional metal halide perovskites (2D-MHP), coupled with a planar nanocavity to significantly enhance optical absorptance—achieving more than a fourfold increase in a solution-processed 10-nm-thick 2D-MHP film. This integration facilitates an exceptional response time (30 ns) alongside a high responsivity of 2.12 A W⁻¹. Our method overcomes traditional constraints related to thickness and absorption, thereby optimizing device speed and dark noise features through active area variation. Intriguingly, the nanocavity architecture provided a unique protection of 2D-MHP layers, realizing remarkable operational and environmental stability: our devices maintain performance integrity for over 150 days. Notably, our best-performing cavity-enhanced devices exhibit the capability to establish an optical wireless communication link, achieving a data transmission rate of 20 Mbps. This approach effectively tackles the challenges posed by the low absorption of ultrathin layers, heralding a new era for applications in imaging, optical communication systems, and more.

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通过平面纳米空腔工程实现具有超强环境稳定性的高速、自供电二维透镜光电探测器

光电探测器（PD）技术的进步对于光通信和成像系统的发展至关重要。要满足这些应用的需求，光电探测器必须同时具备高速响应和高灵敏度。在此背景下，我们介绍了一种创新的高速 PD 设计，它利用超薄二维金属卤化物过氧化物（2D-MHP）与平面纳米腔相结合，显著提高了光吸收率--在溶液加工的 10 纳米厚 2D-MHP 薄膜上实现了四倍以上的增长。这种集成技术有助于实现超常的响应时间（30 ns）和 2.12 A W-1 的高响应率。我们的方法克服了与厚度和吸收相关的传统限制，从而通过有源面积变化优化了器件速度和暗噪特性。耐人寻味的是，纳米空腔结构为 2D-MHP 层提供了独特的保护，实现了显著的操作和环境稳定性：我们的器件可在 150 多天内保持性能完整性。值得注意的是，我们性能最好的空腔增强器件具有建立光无线通信链路的能力，数据传输速率达到 20 Mbps。这种方法有效地解决了超薄层低吸收所带来的挑战，预示着成像、光通信系统等应用进入了一个新时代。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials Science and Engineering: R: Reports 工程技术-材料科学：综合

CiteScore

60.50

自引率

0.30%

发文量

审稿时长

34 days

期刊介绍： Materials Science & Engineering R: Reports is a journal that covers a wide range of topics in the field of materials science and engineering. It publishes both experimental and theoretical research papers, providing background information and critical assessments on various topics. The journal aims to publish high-quality and novel research papers and reviews. The subject areas covered by the journal include Materials Science (General), Electronic Materials, Optical Materials, and Magnetic Materials. In addition to regular issues, the journal also publishes special issues on key themes in the field of materials science, including Energy Materials, Materials for Health, Materials Discovery, Innovation for High Value Manufacturing, and Sustainable Materials development.