Broadband-Detection and Low-Operating-Voltage Photodetectors Based on Metal Oxide/Perovskite Quantum Dot Heterojunctions

IF 4.8 2区化学 Q2 CHEMISTRY, PHYSICAL

The Journal of Physical Chemistry Letters Pub Date : 2025-04-25 DOI:10.1021/acs.jpclett.5c00734

Dalong Ge, Jiaqi Xu, Tian Tian, Xianglong Wang, Yu Zhang, Feiyang Xu, Baochuan Shao, Qi Chen, Mengyao Wei, Yuanbin Qin, Fengyun Wang

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Abstract

To achieve comprehensive environmental monitoring, photodetectors with broad operational wavelength range are crucial for capturing realistic wide-spectrum signals and supporting integrated system operations. This study presents a high-performance photodetector based on InSrO nanofiber (NF)/CsPbBr₃ quantum dot (QD) heterojunctions, achieving broadband detection (230–500 nm) and ultralow operating voltage (0.05 V). By synergistically combining the UV absorption of InSrO NFs with the visible-light sensitivity of CsPbBr₃ QDs, the device exhibits a responsivity of 6.88 A·W^–1 and a detectivity of 6.39 × 10¹⁴ Jones. Systematic analysis reveals that the heterointerface facilitates efficient charge separation, while the 1D nanofiber architecture enhances directional carrier transport. Notably, the photodetectors can retain 95% of the initial photocurrent after 15 days, demonstrating exceptional stability. This work can advance the development of energy-efficient optoelectronic devices for environmental monitoring and optical communications applications.

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要实现全面的环境监测，具有宽工作波长范围的光电探测器对于捕捉真实的宽光谱信号和支持综合系统操作至关重要。本研究提出了一种基于 InSrO 纳米纤维（NF）/CsPbBr3 量子点（QD）异质结的高性能光电探测器，可实现宽带检测（230-500 nm）和超低工作电压（0.05 V）。通过协同结合 InSrO NFs 的紫外吸收和 CsPbBr3 QD 的可见光灵敏度，该器件的响应率达到 6.88 A-W-1，探测率达到 6.39 × 1014 Jones。系统分析显示，异质表面促进了有效的电荷分离，而一维纳米纤维结构则增强了载流子的定向传输。值得注意的是，该光电探测器在 15 天后仍能保持 95% 的初始光电流，显示出卓越的稳定性。这项工作可推动用于环境监测和光通信应用的高能效光电器件的发展。

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

The Journal of Physical Chemistry Letters CHEMISTRY, PHYSICAL-NANOSCIENCE & NANOTECHNOLOGY

CiteScore

9.60

自引率

7.00%

发文量

1519

审稿时长

1.6 months

期刊介绍： The Journal of Physical Chemistry (JPC) Letters is devoted to reporting new and original experimental and theoretical basic research of interest to physical chemists, biophysical chemists, chemical physicists, physicists, material scientists, and engineers. An important criterion for acceptance is that the paper reports a significant scientific advance and/or physical insight such that rapid publication is essential. Two issues of JPC Letters are published each month.