Electrolyte infiltration in phosphazene-based dye-sensitized solar cells

被引:23
作者
Fei, Shih-To [1 ]
Lee, Seung-Hyun Anna [1 ]
Pursel, Sean M. [2 ]
Basham, James [3 ]
Hess, Andrew [1 ]
Grimes, Craig A. [3 ]
Horn, Mark W. [2 ]
Mallouk, Thomas E. [1 ]
Allcock, Harry R. [1 ]
机构
[1] Penn State Univ, Dept Chem, University Pk, PA 16802 USA
[2] Penn State Univ, Dept Engn Sci & Mech, University Pk, PA 16802 USA
[3] Penn State Univ, Dept Elect Engn, University Pk, PA 16802 USA
关键词
Dye sensitized solar cells; Electrolyte; Phosphazene; Polyphosphazene; Nano-structured surface; POLYMER ELECTROLYTES; SOLID-ELECTROLYTE; TEMPERATURE; CONVERSION;
D O I
10.1016/j.jpowsour.2011.01.052
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
We report here a study of phosphazene polymer and oligomer electrolyte infiltration into high surface area titanium dioxide electrodes and its effect on the performance of dye-sensitized solar cells. The effects of different cell assembly procedures on the electrochemical properties are examined, as well as the infiltration of electrolytes based on poly[bis(2-(2-methoxyethoxy)ethoxy)phosphazene] (MEEP), hexakis(2-(2-methoxyethoxy)ethoxy)cyclotriphosphazene (MEE trimer), and a linear short chain analogue into conventional titanium dioxide electrode mesoporous (nanosphere) films, microcolumns and nanowires. The effects of temperature, co-solvents, and the order of addition of the electroactive components are found to affect both the conductivity of the electrolytes and the electrochemical performance of the cells. Cross-sectional scanning electron microscopy (SEM) imaging is employed to examine the degree of electrolyte infiltration into the nanostructured electrodes as a function of filling conditions. Using these techniques, conditions are identified for achieving a high degree of pore filling by the three electrolyte systems. Increased power conversion efficiency is obtained when iodine is introduced after the heating and evacuation procedures required for maximum infiltration. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码:5223 / 5230
页数:8
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