Mixed-Dimensional 3D BiOCl Nanosheet Arrays/2D ZnO Nanoparticle Film Heterojunction Photodetectors with High Self-Powered Performance for Light Communication

IF 3.4 4区工程技术 Q2 ENGINEERING, CHEMICAL

Processes Pub Date : 2025-10-25 DOI:10.3390/pr13113428

Mingmin Zhang, Weixin Ouyang

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引用次数: 0

Abstract

High-performance self-powered ultraviolet (UV) photodetectors (PDs) based on mixed-dimensional 3D BiOCl nanosheet array/2D ZnO nanoparticle films heterojunction were fabricated via facile spin-coating and impregnation methods. Under zero bias, compared to the pristine ZnO PD exhibiting a large dark current (≈2 μA) and slow response time (>20 s/>20 s), the optimized 2-BiOCl-ZnO heterojunction PD demonstrated a dramatically suppressed dark current (≈1 nA), along with an ultrahigh on/off ratio (22,748) and a shorter response time (17.44 ms/14 ms) under 365 nm light illumination. This optimized device also achieved a remarkable responsivity of 1.08 A·W−1 and a detectivity of 2.48 × 1013 Jones at 354 nm. The built-in electric field formed at the BiOCl-ZnO heterojunction interface, the improved light absorption enabled by the mixed-dimensional heterostructure, and the optimized charge carrier separation and transport within the device were responsible for the enhanced self-powered performance. Due to its fascinating photoelectric properties, this PD was applied as a self-powered signal receiver in a UV optical communication system, demonstrating the ability to achieve efficient and high-speed message transmission. The rational construction of BiOCl-based heterojunction has proved to be an efficient pathway to achieving self-powered photodetection. These results demonstrate that the rational construction of heterojunctions holds great potential for fabricating high-performance PDs.

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用于光通信的高自供电性能的混合维3D BiOCl纳米片阵列/2D ZnO纳米颗粒薄膜异质结光电探测器

采用自旋镀膜和浸渍法制备了基于混合三维BiOCl纳米片阵列/二维ZnO纳米颗粒薄膜异质结的高性能自供电紫外探测器（UV）。在零偏置下，与原始ZnO PD相比，优化后的2- biocl -ZnO异质结PD在365 nm光照下具有较大的暗电流（≈2 μA）和较慢的响应时间（>20 s/>20 s），具有明显的暗电流抑制（≈1 nA）、极高的开/关比（22,748）和较短的响应时间（17.44 ms/14 ms）。该器件在354nm处的响应率为1.08 a·W−1，探测率为2.48 × 1013 Jones。在BiOCl-ZnO异质结界面形成的内置电场、混合维异质结构改善的光吸收以及优化的电荷载流子分离和传输是器件自供电性能增强的原因。由于其优异的光电性能，该PD作为自供电信号接收器应用于紫外光通信系统中，显示了实现高效高速信息传输的能力。合理构建biocl异质结已被证明是实现自供电光探测的有效途径。这些结果表明，异质结的合理结构在制备高性能pd方面具有很大的潜力。

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来源期刊

Processes Chemical Engineering-Bioengineering

CiteScore

5.10

自引率

11.40%

发文量

2239

审稿时长

14.11 days

期刊介绍： Processes (ISSN 2227-9717) provides an advanced forum for process related research in chemistry, biology and allied engineering fields. The journal publishes regular research papers, communications, letters, short notes and reviews. Our aim is to encourage researchers to publish their experimental, theoretical and computational results in as much detail as necessary. There is no restriction on paper length or number of figures and tables.