染料敏化TiO_2单晶纳米棒阵列太阳电池的性能  

Performance of Solar Cells Containing Dye-Sensitized TiO_2 Single-Crystal Nanorod Arrays

作　　者：王波[1] 顾修全[1] 

机构地区：[1]中国矿业大学材料科学与工程学院,江苏徐州221116

出　　处：《微纳电子技术》2012年第5期306-312,共7页Micronanoelectronic Technology

基　　金：中国矿业大学青年基金资助项目(2009A55)

摘　　要：采用水热法一步合成出TiO2单晶纳米棒有序阵列,进而制备出染料敏化太阳电池。重点探讨了退火时间变化对电池光电转化效率的影响。研究结果表明,与未退火的纳米棒组装而成的电池相比,退火后的纳米棒电池显示出更高的光电转化效率。并且当退火时间为7 min时,光电转化效率最高(5.05%),提高到未退火电池光电转化效率的300%以上。电池性能提高的原因有:TiO2纳米棒阵列与衬底间结合力的增强有利于电子传输;表面态缺陷的减少有利于抑制光生载流子的复合。结合SEM,TEM和J-V曲线等表征手段探讨了这一现象背后的物理机制。The TiO2 single-crystal nanorod arrays were synthesized through one-step hydrothermal route,and then the dye-sensitized solar cells（DSSCs） were prepared.The influence of the annealing time on the photoelectric conversion efficiency of the DSSCs was discussed.The research results show that compared with the unannealed cells,the cells containing the nanorod arrays after annealing displays the higher conversion efficiency.The photoelectric conversion efficiency of 5.05 % is the highest at the annealing time of 7 min,which increases up to 300% of the unannealed cells.The reasons of photovoltaic performance improved include that the enhancement of the adhesive force between the TiO2 nanorod arrays and the substrate is helpful to electron transport.And the decrease of surface state defect is helpful to suppress the recombination of photo-generated charges.The underlying physical mechanism was discussed on the basis of the SEM,TEM and J-V curves.

关 键 词：TiO2 纳米棒 染料敏化太阳电池 光电转化效率 退火 

分 类 号：TM914.4[电气工程—电力电子与电力传动]