透明Pt对电极的制备及其在DSSC中的应用

采用简单的电化学沉积法在FTO导电玻璃表面制备了透明的Pt电极,用紫外可见分光光度计和电化学循环伏安法分析了透明Pt对电极的透光性及电催化活性,结果表明,此种方法制备的透明Pt对电极的透光率达到了80%,且具有良好的电催化性能,组装DSSC的效率达到了3.54%。     

Nanostructured polyaniline counter electrode for dye-sensitised solar cells: Fabrication and investigation of its electrochemical formation mechanism

Nanostructured polyaniline films with controlled thickness have been successfully grown on fluorine-doped tin oxide (FTO) glass substrates using the cyclic voltammetry (CV) method at room temperature. The formation mechanism of the polyaniline film is monitored by CV techniques, alternating current (AC) impedance spectroscopy, scanning electron microscopy (SEM) and atomic force microscopy (AFM). It is found that the accumulation of nanostructured polyaniline (>70 nm) on both the scattered and compact layers simultaneously increased the reactive interface, which supports charge transfer at the interface and resistance that hinders electronic transport in the film. By optimising the preparation conditions, the short-circuit photocurrent density of a dye-sensitised solar cell (DSSC) with a PANI counter electrode (CE) increased by 11.6% in comparison to a DSSC with an electrodeposited platinum CE.     

纳米结构聚苯胺和聚吡咯电活性的对比研究

采用简单的电化学聚合方法在FTO导电玻璃表面制备了纳米结构的聚苯胺(PANI)和聚吡咯(PPy),用扫描电镜(SEM)图和电化学循环伏安法分析了两种聚合物薄膜的形貌和电催化活性,结果表明,两种聚合物纳米形貌的不同导致了其电活性的差异。PANI内部颗粒状紧密层和外部蓬松网状疏松层的结构显著增大了膜的比表面积,相比PPy具有更好的电催化活性和更高的电池效率。     

Electropolymerization of a poly(3,4-ethylenedioxythiophene) and functionalized, multi-walled, carbon nanotubes counter electrode for dye-sensitized solar cells and characterization of its performance

Composite films of poly(3,4-ethylenedioxythiophene) and functionalized, multi-walled, carbon nanotubes (PEDOT–MWCNT) were fabricated by a simple oxidative electropolymerization method. These films were formed on fluorine-doped, tin oxide, glass substrates as counter electrodes (CEs) of platinum-free, dye-sensitized solar cells (DSSCs). The surface morphology, formation mechanism and electrochemical nature of PEDOT–MWCNT films were investigated using scanning electron microscopy (SEM), atomic force microscopy (AFM), cyclic voltammetry (CV) and alternating current (AC) impedance spectroscopy. The SEM and AFM images showed that PEDOT–MWCNT films were more porous than PEDOT films. CV and AC impedance spectroscopy revealed that the PEDOT–MWCNT electrode had higher electrocatalytic activity for the I₃⁻/I⁻ redox reaction and a smaller charge transfer resistance than the PEDOT electrodes. The energy conversion efficiency of the DSSC with a PEDOT–MWCNT CE was 13.0% higher than with a PEDOT CE using the same conditions with a ruthenium sensitizer.