Highly DUV to NIR-II responsive broadband quantum dots heterojunction photodetectors by integrating quantum cutting luminescent concentrators

IF 20.6 Q1 OPTICS
Nan Ding, Wen Xu, Hailong Liu, Yuhan Jing, Zewen Wang, Yanan Ji, Jinlei Wu, Long Shao, Ge Zhu, Bin Dong
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Abstract

Low-cost, high-performance, and uncooled broadband photodetectors (PDs) have potential applications in optical communication etc., but it still remains a huge challenge to realize deep UV (DUV) to the second near-infrared (NIR-II) detection for a single broadband PD. Herein, a single PD affording broadband spectral response from 200 to 1700 nm is achieved with a vertical configuration based on quantum dots (QDs) heterojunction and quantum cutting luminescent concentrators (QC–LC). A broadband quantum dots heterojunction as absorption layer was designed by integrating CsPbI3:Ho3+ perovskite quantum dots (PQDs) and PbS QDs to realize the spectral response from 400 to 1700 nm. The QC–LC by employing CsPbCl3:Cr3+, Ce3+, Yb3+, Er3+ PQDs as luminescent conversion layer to collect and concentrate photon energy for boosting the DUV–UV (200–400 nm) photons response of PDs by waveguide effect. Such broadband PD displays good stability, and outstanding sensitivity with the detectivity of 3.19 × 1012 Jones at 260 nm, 1.05 × 1013 Jones at 460 nm and 2.23 × 1012 Jones at 1550 nm, respectively. The findings provide a new strategy to construct broadband detector, offering more opportunities in future optoelectronic devices.

Abstract Image

通过集成量子切割发光聚光器实现高紫外至近红外-II 波段响应的宽带量子点异质结光电探测器
低成本、高性能、非致冷的宽带光电探测器(PD)在光通信等领域具有潜在的应用前景,但要在单个宽带光电探测器上实现深紫外(DUV)到第二近红外(NIR-II)的探测仍是一个巨大的挑战。在此,基于量子点(QDs)异质结和量子切割发光聚光器(QC-LC)的垂直配置实现了单个 PD,其光谱响应范围为 200 纳米到 1700 纳米。通过整合 CsPbI3:Ho3+ perovskite 量子点 (PQDs) 和 PbS QDs,设计了一种作为吸收层的宽带量子点异质结,以实现 400 到 1700 纳米的光谱响应。采用 CsPbCl3:Cr3+、Ce3+、Yb3+、Er3+ PQDs 作为发光转换层的 QC-LC 可收集和集中光子能量,从而通过波导效应提高 PD 的紫外-紫外(200-400 nm)光子响应。这种宽带光致发光器件具有良好的稳定性和出色的灵敏度,在 260 纳米波长下的检测率为 3.19 × 1012 琼斯,在 460 纳米波长下的检测率为 1.05 × 1013 琼斯,在 1550 纳米波长下的检测率为 2.23 × 1012 琼斯。这些发现为构建宽带探测器提供了一种新策略,为未来的光电器件提供了更多机会。
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来源期刊
Light-Science & Applications
Light-Science & Applications 数理科学, 物理学I, 光学, 凝聚态物性 II :电子结构、电学、磁学和光学性质, 无机非金属材料, 无机非金属类光电信息与功能材料, 工程与材料, 信息科学, 光学和光电子学, 光学和光电子材料, 非线性光学与量子光学
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审稿时长
2.1 months
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