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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Urea-Treated Electrolytes for Higher Efficiency Dye-Sensitized Solar Cells
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Urea-Treated Electrolytes for Higher Efficiency Dye-Sensitized Solar Cells

机译：尿素处理的电解质，用于更高效率的染料敏化太阳能电池

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Urea was used as additive for the triiodide/iodide electrolyte (I-/I3-) to increase the efficiencies of dye-sensitized solar cells.(DSSCs). Different concentrations (0, 2, S, 10, and 20 wt %.) of urea were added to the electrolyte to improve overall DSSC performance. The optimal concentration was found at 10 wt %. Significant improvements were achieved in both open circuit voltage (V-oc) and fill factor (FF) by. increasing the urea wt % Urea is considered a Bronsted-Lowry base that has a lone pair of electrons. The power conversion efficiency (PCE %) was remarkably improved from similar to 8.5% without the use of urea to similar to 10.1% for the optimal 10 wt % of urea in the electrolyte. The efficiency enhancement was attributed mainly to the decrease of triiodide (I-3(-)) in the electrolyte due to the higher urea wt. % and the enhanced intermolecular hydrogen bonding between the urea and electrolyte when the excess H+ was introduced to the electrolyte at a higher urea wt %.
机译：尿素用作三碘化物/碘化物电解质（I- / I3-）添加剂，以增加染料敏化太阳能电池的效率。（DSSCs）。 向电解质中加入不同浓度（0,2，S，10和20wt％。）尿素以改善整体DSSC性能。 最佳浓度以10wt％发现。 在开路电压（V-OC）和填充因子（FF）中实现了显着的改进。 增加尿素Wt％尿素被认为是具有孤立电子对电子的布朗斯特的洛氏碱基。 功率转换效率（PCE％）从类似于8.5％的情况下显着改善，无需使用尿素以类似于电解质中最佳的10wt％的尿素的10.1％。 效率增强主要归因于由于尿素WT的电解质中的三碘化物（I-3（））降低。 当过量的H +以更高的尿素Wt％引入电解质时，尿素和电解质之间的％和增强的分子间氢键合。

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