Synergistic effects of interfacial modifiers enhance current and voltage in hybrid solar cells
Synergistic effects of interfacial modifiers enhance current and voltage in hybrid solar cells
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DOI：
10.1063/1.4824040
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发表时间：
2013-10
期刊：
影响因子：
6.1
通讯作者：
J. Weickert;Eugen Zimmermann;Julian B. Reindl;T. Pfadler;J. Dorman;A. Petrozza;L. Schmidt‐Mende
中科院分区：
文献类型：
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作者：
J. Weickert;Eugen Zimmermann;Julian B. Reindl;T. Pfadler;J. Dorman;A. Petrozza;L. Schmidt‐Mende
为了充分发挥混合太阳能电池的潜力，必须从敏化染料和聚合物空穴转运体中获得显著的光电流贡献。在这里，我们报道了界面改性剂4-巯基吡啶（4-MP），它在界面上诱导了聚（3-己基噻吩）（P3HT）的定向控制，P3HT是混合太阳能电池中最广泛使用的空穴传输聚合物。4-MP优化了P3HT与方形染料修饰的TiO2之间的电荷分离界面，增强了聚合物对光电流产生的贡献。与4-叔丁基吡啶结合，可以提高染料敏化和混合太阳能电池的开路电位，但降低光电流，观察到协同效应，可以同时提高开路电压和光电流。对于另外两种常用的染料分子，富勒烯衍生物和常见的吲哚染料，也发现了对器件性能的类似影响。
To unleash the full potential of hybrid solar cells, it is imperative to get significant photocurrent contribution from both the sensitizing dye and the polymeric hole transporter. Here we report on the interfacial modifier 4-mercaptopyridine (4-MP), which induces controlled orientation of poly(3-hexylthiophene) (P3HT), the most widely used hole transporting polymer for hybrid solar cells, at the interface. 4-MP optimizes the charge separating interface between P3HT and a squaraine dye-decorated TiO2, inducing enhanced contribution to photocurrent generation by the polymer. In combination with 4-tert-butylpyridine, which enhances the open circuit potential in dye-sensitized and hybrid solar cells but reduces the photocurrent, a synergistic effect is observed and it is possible to enhance both open circuit voltage and photocurrent simultaneously. Similar effects on device performance are also found for two other commonly used dye molecules, a fullerene derivative and a common indoline dye.