三维有序大孔碳的合成及其在染料敏化太阳能电池中的应用

Facile Synthesis of Three-dimensional Ordered Macroporous Carbon and Its Application in Dye-Sensitized Solar Cells

以葡萄糖为碳源、硫酸为脱水剂、聚苯乙烯胶体晶体为模板,采用简单的浸渍-煅烧工艺制备了高度三维有序大孔碳(3DOM-C)材料。利用SEM、FESEM、TEM、紫外-可见光光度计和氮气吸附-脱附分析仪对样品进行了表征,考察了3DOM-C、贵金属Pt和活性碳作为对对电极材料在染料敏化太阳能电池(DSSCs)中的光电转化性能,并进一步对电极进行了电化学阻抗分析。结果表明,3DOM-C材料的孔径约为280 nm,具有三维有序网络空间结构。J-V测试结果显示,3DOM-C/DSSC的光电转化效率为4.61%,达到了Pt/DSSC的90%。阻抗测试结果显示,3DOM-C电极表现出良好的电催化活性及导电性,与Pt电极相近且远高于活性碳。

Highly three-dimensional ordered macroporous carbon (3DOM-C) materials were successfully prepared through polystyrene colloidal crystal templates method using glucose as carbon source and sulfuric acid as dehydrating agent. The as-prepared product was characterized by SEM,FESEM,TEM,UV-vis and nitrogen adsorption-desorption measurements. And the photovoltaic performances of the dye-sensitized solar cells (DSSCs) fabricated by the 3DOM-C and noble Pt counter electrodes were investigated,respectively. Moreover,the electrochemical impedance spectroscopies were investigated,respectively. The results show that the 3DOM-C samples display a unique structural property of well developed 3D interconnected ordered macroporous framework with a pore diameter of ca. 280 nm. The results of photovoltaic texts exhibit that the prominent conversion efficient of the 3DOM-C/DSSC is 4. 61% ,which has achieved 90% of Pt based one. The impedance tests show that 3DOM-C electrode displays remarkable electric activity and conductivity,which are close to those of Pt based one and far higher than those of activated carbon.