Time-varied synthesis of hierarchical ZnO microspheres and their applications in dye-sensitized solar cells

被引:4
作者
Waghadkar, Yogesh [1 ,2 ]
Shinde, Manish [1 ]
Ballal, Reshma [1 ]
Rane, Sunit [1 ]
Gosavi, Suresh [3 ]
Chauhan, Ratna [1 ]
机构
[1] Ctr Mat Elect Technol, Off Pashan Rd, Pune 411008, Maharashtra, India
[2] Savitribai Phule Pune Univ, Dept Technol, Pune 411007, Maharashtra, India
[3] Savitribai Phule Pune Univ, Dept Phys, Pune 411007, Maharashtra, India
关键词
ZnO; Solvothermal; Microsphere; DSSCs; HOLLOW MICROSPHERES; NANORODS; TIO2; NANOSTRUCTURES; PHOTOANODES; EFFICIENCY; GROWTH;
D O I
10.1007/s10008-017-3554-y
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Hierarchically nano-structured ZnO microspheres have been synthesized solvothermally at variable reaction times (6, 12, 36, and 48 h) by using ethylene glycol as a solvent, zinc acetate as precursor, and hexamethylene triamine (HMT) as structure directing agent. The study also focused on the mechanism of time-dependant growth of hierarchical ZnO microspheres and their deployment in dye-sensitized solar cells (DSSCs) as photoanode. Longer reaction times lead to formation of nearly spherical ZnO microspheres. The structural and morphological analysis reveals the formation of a wurtzite hexagonal crystalline structure having a microsphere-like morphology. ZnO hierarchical microspheres synthesized at different reaction times have been used as photoanode in DSSCs which show enhanced light-harvesting properties than the commercial ZnO powders. ZnO microspheres synthesized at 48 h show maximum current density and cell efficiency of 8.51 mA/cm(2) and 3.31%, respectively. This enhancement in photovoltaic parameters could be due to highly porous microspheres which provide more specific surface area for dye loading, retardation of recombination, and better charge transport.
引用
收藏
页码:1797 / 1804
页数:8
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