Full text loading...
Schematic diagram of Si junction diode device structure with metallic nanoparticles. Illumination and measurement geometry employed to obtain photocurrent response data are also shown.
Scanning electron micrographs of Au nanoparticles deposited on Si junction diode surfaces. Images are shown for devices with particles (a) 50 nm, (b) 80 nm, and (c) 100 nm in diameter.
Extinction efficiency as a function of wavelength for Au nanoparticles 50, 80, and 100 nm in diameter suspended in aqueous solution. Peaks corresponding to excitation of plasmon resonances are clearly visible in each spectrum.
(a) Photocurrent response as a function of illumination wavelength for Si junction diodes in the absence of nanoparticles, and with Au nanoparticles 50, 80, and 100 nm in diameter. (b) Photocurrent response spectra for diodes with Au nanoparticles 50, 80, and 100 nm in diameter from part (a), normalized to the photocurrent response measured in the absence of nanoparticles, revealing the increased response arising from the presence of the nanoparticles.
Article metrics loading...