【摘要】 通过微乳液法制备尺寸均一的聚吡咯(PPy)纳米小球,并通过溶液沉积法在氧化铟锡玻璃表面制备聚吡咯纳米小球的光电化学池工作电极,以研究其光电探测响应性能。利用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、傅里叶变换红外光谱仪(FT-IR)、紫外-可见吸收光谱仪(UV-Vis)、拉曼光谱仪(Raman)及X-射线粉末衍射仪(XRD),表征及探讨所制备的聚吡咯纳米小球的形貌、尺寸及其物理和化学性能;采用光电化学池的方法对所制备的聚吡咯纳米小球进行光电探测,通过调节测试参数,系统研究聚吡咯纳米小球的光电探测响应行为。结果表明:制备的PPy纳米小球尺寸均一,缺陷少,光电探测能力强(904nA/cm2),响应速度快(0.6 s),并赋有高的环境稳定性。研究结果可为开拓高性能基于导电聚合物的光电探测器提供理论基础。更多还原

【Abstract】 In this work, the uniform polypyrrole(PPy) nanospheres are successfully synthesized by microemulsion method, and are deposited onto an indium tin oxide(ITO)-coated glasses by solution deposition approach, to fabricate a working electrode in a photoelectrochemical cell for their studies on photodetection performance. Scanning electron microscopy(SEM), transmission electron microscopy(TEM), Fourier transform infrared spectroscopy(FT-IR), UV-visible absorption spectrometer(UV-Vis), Raman spectroscopy and X-ray powder diffraction(XRD) are employed to characterize the morphology, size and physicochemical properties of the as-synthesized PPy nanospheres. The photoelectrochemical cell is utilized to evaluate the photodetection performance of PPy nanospheres, and the photoresponse behaviours of PPy nanospheres are systematically investigated by adjusting test parameters. The results demonstrate that the as-synthesized PPy nanospheres has uniform size, few defects, strong photoelectric detection capability(904 nA/cm2), fast response speed(0.6 s) and high environmental stability, which provides theoretical basis for developing high-performance conductive polymer-based photodetectors.更多还原