Solution-processable phototransistor of PbS quantum dots/ZnO for highly responsive 1550 nm near infrared photodetection

IF 9.4 1区化学 Q1 CHEMISTRY, PHYSICAL

Journal of Colloid and Interface Science Pub Date : 2025-07-06 DOI:10.1016/j.jcis.2025.138313

Zexun Pan , Jiayi Zhang , Lei Zhang , Huili Wei , Wei Tang , Liangyou Lin , Heming Deng , Peng Fan , Jingwen Qian , Jinhua Li

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Abstract

Due to the low-cost in manufacturing and good compatibility with flexible substrate, lead sulfide quantum dots (PbS QDs) are increasingly regarded as a promising active material candidate for next-generation near-infrared (NIR) photodetectors. In this study, a highly sensitive phototransistor of composite film of PbS QDs and ZnO are demonstrated through combining the excellent light absorption properties of PbS QDs with the high carrier mobility of ZnO. The PbS QDs /ZnO hybrid phototransistors exhibits an ultrahigh responsivity (R) of 1.87 × 10² A/W and detectivity (D^⁎) of 2.81 × 10¹² Jones under 1550 nm NIR illumination. Furthermore, a 3 × 3 phototransistor array is successfully fabricated to demonstrate their potential of applications in NIR image sensor systems. Our research validates the PbS QDs as a possibility for future optoelectronic applications.

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溶液可处理的PbS量子点/ZnO光电晶体管，用于高响应的1550 nm近红外光电探测

由于制造成本低和与柔性衬底的良好相容性，硫化铅量子点（PbS QDs）越来越被认为是下一代近红外（NIR）光电探测器的有前途的活性材料候选材料。本研究通过结合PbS量子点优异的光吸收特性和ZnO的高载流子迁移率，展示了PbS量子点和ZnO复合薄膜的高灵敏度光电晶体管。在1550 nm近红外照射下，PbS QDs /ZnO混合光电晶体管具有1.87 × 102 A/W的超高响应率(R)和2.81 × 1012 Jones的探测率(D)。此外，成功地制作了一个3 × 3光电晶体管阵列，以展示其在近红外图像传感器系统中的应用潜力。我们的研究验证了PbS量子点作为未来光电应用的可能性。

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来源期刊

Journal of Colloid and Interface Science 化学-物理化学

CiteScore

16.10

自引率

7.10%

发文量

2568

审稿时长

2 months

期刊介绍： The Journal of Colloid and Interface Science publishes original research findings on the fundamental principles of colloid and interface science, as well as innovative applications in various fields. The criteria for publication include impact, quality, novelty, and originality. Emphasis: The journal emphasizes fundamental scientific innovation within the following categories: A.Colloidal Materials and Nanomaterials B.Soft Colloidal and Self-Assembly Systems C.Adsorption, Catalysis, and Electrochemistry D.Interfacial Processes, Capillarity, and Wetting E.Biomaterials and Nanomedicine F.Energy Conversion and Storage, and Environmental Technologies