Page 120 - 《真空与低温》2025年第3期

第 31 卷 第 3 期 真空与低温
2025 年 5 月 Vacuum and Cryogenics 391

基 于 CH NH PbI Cl 钙 钛 矿 的 自 滤 波 窄 带 光 电 探 测 器 研 究
x
3
3
3-x
薛新意，韩金君，狄云松，甘志星
（南京师范大学，南京 210023）

摘要：窄带光电探测器在光通信、生物医学成像等高技术领域中有重要应用。然而，窄带探测器在探测范围、
响应速度、暗电流等方面，仍不及性能卓越的真空探测器。通过调控离子掺杂浓度，成功制备了高质量的
CH 3 NH 3 PbX 3 晶体，并在此基础上开发了高性能窄带光电探测器。实验结果表明：离子掺杂实现了波长范围的精
√
确调控，半峰宽仅为 18 nm；响应度达到 106 mA/W，外量子效率最高可达 26%，探测率为 3.8×10 10 cm·Hz/W；在
476～494 nm、526～544 nm、586～604 nm 波段范围内实现了自滤波功能，达到了更精确的窄带光谱响应。该探测
器在光通信、工业过程控制、安全检查及医疗成像领域具有广泛的应用潜力。
关键词：窄带；自滤波；高响应度；高性能
中图分类号：TB79 文献标志码：A 文章编号：1006−7086（2025）03−0391−06
DOI：10.12446/j.issn.1006-7086.2025.03.015

Research on Self Filtering Narrowband Photodetector Based on CH 3 NH 3 PbI 3-x Cl x Perovskite

XUE Xinyi，HAN Jinjun，DI Yunsong，GAN Zhixing
（Nanjing Normal University，Nanjing 210023，China）

Abstract： Narrowband photodetectors play a pivotal role in high-tech applications such as optical communication，
biomedical imaging，and industrial sensing. However，current detectors have yet to outperform conventional vacuum detec-
tors in terms of detection range，response speed，and dark current，primarily due to the environmental sensitivity and stability
limitations of perovskite materials. This paper presents the fabrication and characterization of a self-filtering narrowband per-
ovskite photodetector. By optimizing the surface morphology and grain size of perovskite films and exploiting the bandgap
tunability of these materials， we demonstrate self-filtering capabilities in three specific wavelength ranges： 476～ 494 nm，
526～544 nm，and 586～604 nm. This innovation enables precise narrowband spectral responses essential for applications
requiring high spectral selectivity. Systematic testing confirms significant performance enhancements within the target wave-
length bands. The device achieves a responsivity of 106 mA/W，a twofold improvement in response speed，and a dark cur-
rent reduction from 10 nA to 5 nA. These advancements directly address the limitations of current perovskite-based detectors.
Comparative analysis shows that the self-filtering detector outperforms existing perovskite and vacuum photodetectors in
terms of detection precision， response speed， and noise characteristics. Its high performance and self-filtering capabilities
make it a promising candidate for applications in optical communication， industrial process control， safety inspection， and
medical imaging. The proposed device not only overcomes the current bottlenecks of perovskite-based detectors but also
paves the way for further advancements in narrowband photodetection technologies. This work underscores the potential of
perovskite materials to revolutionize the photodetector industry and highlights the importance of continued research in this field.
Key words：narrowband；self filtering；high responsiveness；high performance

0 引言 医学成像等领域的重要性日益凸显。传统的窄带

随着信息技术和光电技术的发展，高效、高选 光电探测器虽然已经能够满足一些基本需求，但在
择性的窄带光电探测器在光通信、环境监测、生物 特定应用中仍面临响应波长范围过宽，精确响应速

收稿日期：2024−12−14
基金项目：国家自然科学基金（62205214）
作者简介：薛新意，硕士研究生。E-mail：xuexinayi@163.com