The Effect of Plasmonic Nanoparticles on the Optoelectronic Characteristics of CdTe Nanowires

Abstract

In this work, a simple strategy is proposed to improve the device performance of photodetector by modifying plasmonic nanoparticles onto the surface of semiconductors nanostructure. Both experimental analysis and theoretical simulation show that the plasmonic metal nanoparticles (AuNPs) exhibits obvious localized surface plasmon resonance (LSPR) which can trap incident light efficiently, leading to enhanced photocurrents and improved performance of photoelectronic devices. It is also observed that the AuNPs modified CdTeNW photodetector exhibit apparent sensitivity to 510 nm light, to which pure CdTeNWs is virtually blind. What is more, after AuNPs decoration, the response speed of the photodetector is increased substantially from 6.12 to 1.92 s. It is believed that this result will open up new doors for manipulating light and further improving the efficiency of semiconductor nanostructures based optoelectronic devices.

Surface Plasmon-Enhanced Nano-photodetector for Green Light Detection

“…LSPR effect has proved to be a highly reliable and efficient sensing strategy that can provide a noninvasive, label-free means of detection in real time [4,5]. In addition, LSPR effect has also been utilized as an approach to localize incident light at nanoscale level for improving light confinement when designing high-performance optoelectronic device [6,7], such as photovoltaic devices [8][9][10], light emitting diode (LEDs) [11,12], photodetector [13][14][15], optical waveguide [16,17], electrochromic devices [18], and thermoelectric devices [19,20].…”

Enhanced Forward Scattering of Ellipsoidal Dielectric Nanoparticles

“…Electromagnetic waves scattered by nanoparticles has gained great attention because of its immense applications, including optical communications [1, 2], optical manipulations [3, 4], material science [5, 6], and so on. In general, scattering ordinarily relies on shape, size, and composition of nanoparticles.…”

Surface plasmon resonance enhanced light absorption of Au decorated composition-tuned ZnO/ZnxCd1−xSeyTe1−y core/shell nanowires for efficient H2 production

“…As shown in the inset of Fig. 3(a), this process can be understood by a simple model, 27,28 in which the amount of the hot electrons A() for hydrogen production can be written as an expression with the quantum transmission probability g i modified by the plasmon absorption spectrum S()…”