Efficiency of 10 % for quasi-solid state dye-sensitized solar cells under low light irradiance
Efficiency of 10 % for quasi-solid state dye-sensitized solar cells under low light irradiance
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DOI：
10.1007/s10800-015-0788-1
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发表时间：
2015-04-01
影响因子：
2.9
通讯作者：
Mellander, B. -E.
中科院分区：
文献类型：
--
作者：
Bandara, T. M. W. J.;Jayasundara, W. J. M. J. S. R.;Mellander, B. -E.
使用四丙基碘化铵盐制备用于染料敏化太阳能电池（DSSC）的聚丙烯腈基凝胶电解质。优化后的凝胶电解质在25 A°C下的离子电导率为2.6 mS cm(-1)，在一次太阳照射下，用该凝胶电解质制备的DSSC的开路电压、短路电流密度、填充因子和效率分别为0.71 V、11.8 mA、51和4.2 %。电池的效率随着太阳辐照度的降低而增加，在 3 mW cm(-2) 和 3 mW cm(-2) 的低辐照度值下实现 10% 的效率和 80% 的填充因子。较高强度下的较低效率归因于高辐照强度下氧化还原介体的传输限制。这项工作表明，准固态 DSSC 在低辐照度水平下可以达到接近液体电解质电池的效率。这些结果为通过 DSSC 的光学操纵和控制来提高 DSSC 的效率开辟了新的前景。
Polyacrylonitrile-based gel electrolytes were prepared using tetrapropylammonium iodide salt for dye-sensitized solar cells (DSSCs). The optimized gel electrolyte exhibited an ionic conductivity of 2.6 mS cm(-1) at 25 A degrees C and the DSSC fabricated with this gel electrolyte showed open-circuit voltage, short-circuit current density, fill factor, and efficiency of 0.71 V, 11.8 mA, 51, and 4.2 %, respectively, under one sun irradiation. The efficiency of the cell increases increased with decreasing solar irradiance achieving 10 % efficiency and 80 % fill factor at 3 mW cm(-2) a low irradiance value of 3 mW cm(-2). Lower efficiencies at higher intensities were attributed to transport limitation of the redox mediators at high irradiation intensities. This work suggests that quasi-solid state DSSCs can reach efficiencies close to that of liquid electrolyte-based cells at low irradiance levels. The results open up new vistas on efficiency improvement in DSSCs by optical manipulation and control of DSSCs.