应用化学2025，Vol.42Issue(8)：1078-1086,9.DOI:10.19894/j.issn.1000-0518.250035
阳离子交换法可控制备CdS@PbS核壳量子点及其近红外探测器性能
Controllable Preparation of CdS@PbS Core/Shell Quantum Dots via Cation Exchange and Their Near-Infrared Photodetector
摘要
Abstract
The CdS quantum dots(QDs)were converted into CdS@PbS core-shell QDs with near-infrared(NIR)absorption capacity by cation exchange strategy in N,N-dimethylformamide(DMF)solvent.We characterized the morphology,elemental composition,crystal structure and optical properties of CdS@PbS core-shell QDs by transmission electron microscopy(TEM),X-ray powder diffraction(XRD)and UV-Vis-NIR spectrophotometer.Considering their unique NIR absorption properties,these CdS@PbS core-shell QDs were specially utilized for fabricating self-powered photoelectrochemical-type NIR photodetector(PD).The PDs exhibit an excellent photoresponse performance under 850 nm illumination,with a typical on/off ratio of 2277,a responsivity of 83.3 mA/W,and a detectivity of 2.91×1011 Jones.Notably,the PD shows a good linear relationship between the photocurrent and the incident light intensity,indicating that the device can achieve stable detection under 850 nm illumination with different light intensities.关键词
近红外探测器/自供能/CdS@PbS核壳量子点/阳离子交换法Key words
Near-infrared photodetector/Self-powered/CdS@PbS core/shell quantum dots/Cation exchange strategy分类
化学化工引用本文复制引用
李小丽,李艳莉,李冬..阳离子交换法可控制备CdS@PbS核壳量子点及其近红外探测器性能[J].应用化学,2025,42(8):1078-1086,9.基金项目
国家自然科学基金(No.22171062)、河北省自然科学基金项目(No.B2021109002)、邯郸市科学技术研究与发展计划项目(No.23422404149ZC)和邯郸学院校级项目(No.XZ2022201)资助 Supported by the National Natural Science Foundation of China(No.22171062),the Natural Science Foundation of Hebei Province of China(No.B2021109002),the Handan Science and Technology Research and Development Program(No.23422404149ZC)and the On-campus Projects of Handan University(No.XZ2022201) （No.22171062）
