Time-Integrated Phototransistor Based on Photoactive Gate Engineering for Ultra-Weak Light Detection

IF 9.1 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2026-10-14 Epub Date: 2026-09-28 DOI:10.1021/acs.nanolett.6c03153

Yue Cheng, Yaoqiang Zhou, Shaoguang Zhao, Zekai Dong, Zheng Wei, Jian Zhang, Li Tao

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引用次数: 0

Abstract

Miniaturized weak-light detection is constrained by the reliance on external amplification and signal-accumulation circuitry. Here, we report a time-integrated phototransistor (TIPT) based on γ-InSe photoactive gate architecture that enables intrinsic signal amplification and temporal accumulation within a single device. This architecture enables continuous integration and amplification of weak optical signals, achieving ultra-low-power detection with high photosensitivity, with detection limits down to 29 fW at 520 nm and 4.2 pW at 980 nm. The accumulation process is dynamically tunable and resettable via gate control. A single-device sequential scanning reconstruction further validates improved image contrast through temporal integration due to the robustness and repeatability of TIPT. These results establish time-integrated photogating as a strategy for ultra-low-power photodetection, offering a compact and energy-efficient platform for miniaturized weak-light imaging.

查看原文本刊更多论文

基于光活性门工程的时间集成光电晶体管超弱光检测。

微型化弱光探测受外部放大和信号积累电路的限制。在这里，我们报告了一种基于γ-InSe光活性栅极架构的时间集成光电晶体管（TIPT），它可以在单个器件内实现本征信号放大和时间积累。该架构能够持续集成和放大弱光信号，实现具有高光敏性的超低功耗检测，在520 nm时检测限低至29 fW，在980 nm时检测限低至4.2 pW。积累过程是动态可调的，并可通过门控制复位。由于TIPT的鲁棒性和可重复性，单设备顺序扫描重建进一步验证了通过时间整合改善的图像对比度。这些结果建立了时间积分光门作为超低功耗光探测的策略，为小型化弱光成像提供了一个紧凑和节能的平台。

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

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

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.