This study enhances quantum dot-sensitized solar cells(QDSSCs)with a photoanode containing gold and silver nanoparticles in a diamond-like carbon(DLC)matrix.The nanoparticles exhibit a synergistic effect,increasing th...This study enhances quantum dot-sensitized solar cells(QDSSCs)with a photoanode containing gold and silver nanoparticles in a diamond-like carbon(DLC)matrix.The nanoparticles exhibit a synergistic effect,increasing the photoanode's response to visible light through localized surface plasmon resonance(LSPR).Simulations show that these nanoparticles improve charge transfer and cell efficiency by creating additional electron traps.DLC acts as a shield,protecting silver nanoparticles from corrosion,thus enhancing cell stability.The modified photoanode significantly increases the short-circuit current density compared to the standard photoanode,confirming the simulation results and demonstrating the potential for improved solar cell performance.展开更多
Triangular Au-Ag framework nanostructures （TFN） were synthesized via a multi-step galvanic replacement reaction （MGRR） of single-crystalline triangular silver nanoplates in a chlorauric acid （HAuCl4） solution at...Triangular Au-Ag framework nanostructures （TFN） were synthesized via a multi-step galvanic replacement reaction （MGRR） of single-crystalline triangular silver nanoplates in a chlorauric acid （HAuCl4） solution at room temperature. The morphological, compositional, and crystal structural changes involved with reaction steps were analyzed by using transmission electron microscopy（TEM）, energy-dispersive X-ray spectrometry （EDX）, and X-ray diffraction. TEM combined with EDX and selected area electron diffraction confirmed the replacement of Ag with Au. The in-plane dipolar surface plasmon resonance （SPR） absorption band of the Ag nanoplates locating initially at around 700 nm gradually redshifted to 1 100 nm via a multi-stage replacement manner after 7 stages. The adding amount of HAuCl4 per stage influenced the average redshift value per stage, thus enabled a fine tuning of the in-plane dipolar band. A proposed formation mechanism of the original Ag nanoplates developing pores while growing Au nanoparticles covering this underlying structure at more reaction steps was confirmed by exploiting surface-enhanced Raman scattering （SERS）.展开更多
文摘This study enhances quantum dot-sensitized solar cells(QDSSCs)with a photoanode containing gold and silver nanoparticles in a diamond-like carbon(DLC)matrix.The nanoparticles exhibit a synergistic effect,increasing the photoanode's response to visible light through localized surface plasmon resonance(LSPR).Simulations show that these nanoparticles improve charge transfer and cell efficiency by creating additional electron traps.DLC acts as a shield,protecting silver nanoparticles from corrosion,thus enhancing cell stability.The modified photoanode significantly increases the short-circuit current density compared to the standard photoanode,confirming the simulation results and demonstrating the potential for improved solar cell performance.
基金Project(10804101)supported by the National Natural Science Foundation of ChinaProject(2007CB815102)supported by the National Basic Research Program of ChinaProject(2007B08007)supported by the Science and Technology Development Foundation of Chinese Academy of Engineering Physics,China
文摘Triangular Au-Ag framework nanostructures （TFN） were synthesized via a multi-step galvanic replacement reaction （MGRR） of single-crystalline triangular silver nanoplates in a chlorauric acid （HAuCl4） solution at room temperature. The morphological, compositional, and crystal structural changes involved with reaction steps were analyzed by using transmission electron microscopy（TEM）, energy-dispersive X-ray spectrometry （EDX）, and X-ray diffraction. TEM combined with EDX and selected area electron diffraction confirmed the replacement of Ag with Au. The in-plane dipolar surface plasmon resonance （SPR） absorption band of the Ag nanoplates locating initially at around 700 nm gradually redshifted to 1 100 nm via a multi-stage replacement manner after 7 stages. The adding amount of HAuCl4 per stage influenced the average redshift value per stage, thus enabled a fine tuning of the in-plane dipolar band. A proposed formation mechanism of the original Ag nanoplates developing pores while growing Au nanoparticles covering this underlying structure at more reaction steps was confirmed by exploiting surface-enhanced Raman scattering （SERS）.
