光阳极是染料敏化太阳能电池(dye-sensitized solar cells,简称DSSCs)的关键组成部件之一,它具备负载染料和传输电子的能力。ZnO通常作为的光阳极材料之一。本文以Zn(NO_(3))_(2)·6H_(2)O和尿素为原料,采用化学浴沉积法在镀有ZnO...光阳极是染料敏化太阳能电池(dye-sensitized solar cells,简称DSSCs)的关键组成部件之一,它具备负载染料和传输电子的能力。ZnO通常作为的光阳极材料之一。本文以Zn(NO_(3))_(2)·6H_(2)O和尿素为原料,采用化学浴沉积法在镀有ZnO种子层的FTO导电玻璃上制备了ZnO复合光阳极,并组装成DSSCs。主要研究了散射层浓度和浸渍次数等对ZnO复合光阳极和DSSCs电池性能的影响。通过SEM、EIS、J-V以及IPCE测试,对ZnO复合光阳极的表面形貌,物相结构,以及光电性能等参数进行了系统的分析。结果表明:采用1gZnO团聚体粉中加入15mL无水乙醇和去离子水制备的散射层光阳极膜的性能最佳,其光电转化效率(photoelectric conversion efficiency,PCE)为7.01%,开路电压(Open-circuitvoltage,简称Voc)为0.64V,短路电流密度(Short-circuit currentdensity,简称Jsc)为18.23mA/cm^(2),填充因子(Fill factor,简称FF)为0.60。展开更多
We synthesized a mesoporous film based on TiO2-reduced graphene oxide(RGO)hybrids using a one-step vapor-thermal method without the need for an additional annealing process.The vapor-thermally prepared TiO2-graphene h...We synthesized a mesoporous film based on TiO2-reduced graphene oxide(RGO)hybrids using a one-step vapor-thermal method without the need for an additional annealing process.The vapor-thermally prepared TiO2-graphene hybrid(VTH)features unique structures with an ultra-large specific surface area of^260 m^2 g^-1 and low aggregation,giving rise to enhanced light harvesting and increased charge generation and separation efficiency.It was observed that a mesoporous film with uniform pore distribution is simultaneously obtained during the VTH growth process.When a 5.0 wt%RGO VTH film was used as the active layer in photocatalysis,the highest photocatalytic activity for degradation of methyl orange was achieved.For another,when a 0.75 wt%RGO VTH film was used as the photoanode in a dye-sensitized solar cell,the power conversion efficiency reached 7.58%,which represents an increase of 73.1%compared to a solar cell using an a photoanode of pure TiO2 synthesized by a traditional solvothermal method.It is expected that this facile method for the synthesis of TiO2/graphene hybrid mesoporous films will be useful in practical applications for preparing other metal oxide/graphene hybrids with ultra-high photocatalytic activity and photovoltaic performance.展开更多
利用简单的两步水热法,制备了由底层一维TiO2纳米杆阵列以及上层三维TiO2纳米花团簇结构构成的TiO2纳米森林光阳极薄膜及其染料敏化太阳能电池（dye-sensitized solar cell,DSSC）.本文分别研究了TiO2纳米颗粒、一维TiO2纳米杆阵列以及...利用简单的两步水热法,制备了由底层一维TiO2纳米杆阵列以及上层三维TiO2纳米花团簇结构构成的TiO2纳米森林光阳极薄膜及其染料敏化太阳能电池（dye-sensitized solar cell,DSSC）.本文分别研究了TiO2纳米颗粒、一维TiO2纳米杆阵列以及纳米森林结构对光阳极和DSSC性能的影响.实验结果显示,TiO2纳米森林结构可提高光阳极对入射光和散射光的利用以及对光生载流子的收集和传输速率.因此,基于TiO2纳米森林结构光阳极的DSSC经过TiCl4后处理后具有最佳性能,其短路电流密度（short-circuit photocurrent density,J（sc））为16.31mA·cm^-2,光电转换效率（photoelectric conversion efficiency,PCE）为6.47%,与基于TiO2纳米颗粒光阳极的DSSC相比,分别提高了约30.7%和17.4%.展开更多
文摘We synthesized a mesoporous film based on TiO2-reduced graphene oxide(RGO)hybrids using a one-step vapor-thermal method without the need for an additional annealing process.The vapor-thermally prepared TiO2-graphene hybrid(VTH)features unique structures with an ultra-large specific surface area of^260 m^2 g^-1 and low aggregation,giving rise to enhanced light harvesting and increased charge generation and separation efficiency.It was observed that a mesoporous film with uniform pore distribution is simultaneously obtained during the VTH growth process.When a 5.0 wt%RGO VTH film was used as the active layer in photocatalysis,the highest photocatalytic activity for degradation of methyl orange was achieved.For another,when a 0.75 wt%RGO VTH film was used as the photoanode in a dye-sensitized solar cell,the power conversion efficiency reached 7.58%,which represents an increase of 73.1%compared to a solar cell using an a photoanode of pure TiO2 synthesized by a traditional solvothermal method.It is expected that this facile method for the synthesis of TiO2/graphene hybrid mesoporous films will be useful in practical applications for preparing other metal oxide/graphene hybrids with ultra-high photocatalytic activity and photovoltaic performance.
