Role of electron transfer dynamics in nano/sub-micro scale skeleton structured photoanode of dye sensitized solar cells
Role of electron transfer dynamics in nano/sub-micro scale skeleton structured photoanode of dye sensitized solar cells
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电子转移动力学在染料敏化太阳能电池纳米/亚微米骨架结构光电阳极中的作用
DOI：
10.1016/j.electacta.2015.02.238
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发表时间：
2015-05
影响因子：
6.6
通讯作者：
Songyuan Dai
中科院分区：
文献类型：
--
作者：
Weiqing Liu;Jun Chen;Minggang Chai;Zhongguan Liang;Linhua Hu;Songyuan Dai
由亚微米tio2粒子组成的散射层覆盖在由纳米tio2粒子组成的光活性层的顶部，共同形成“光活性层/散射层”，即染料敏化太阳能电池（dsc）光阳极的双层骨架微观结构。这种类型的光阳极延长了入射光的光路，使光的重复吸收成为可能，从而提高了dsc的效率。由于光学有源层和散射层是整体烧结的，材料具有均匀性，因此研究散射层对光阳极性能的影响不应局限于光阳极的光学性能。本文详细研究了散射层的非光学性质，包括电子分布、电荷积累、输运/复合动力学，以及这些性质对dsc的内在影响。结果表明，该散射层不仅可以简单地反射光，而且具有独特的电子特性。就像光学有源层一样，散射层可以容纳电子。在去除导带运动的影响后，散射层中的电子传递时间和寿命比光学有源层中的电子传递时间和寿命要快。可以合理推断，在具有光阳极双层骨架结构的dsc中，主要输运过程发生在光活性层，在一定偏置范围内散射层的复合率高于光活性层的复合率。因此，在工作条件下，电子通过散射层的复合过程可能是一种潜在的复合路径。
Composed of sub-micron TiO2particles, the scattering layer covers the top of the optical active layer composed of nano TiO2particles to together form the “optical active layer/scattering layer”, the double-layer skeleton microstructure of the photoanode in dye sensitized solar cells (DSCs). This type of photoanode extends the optical path of the incident light and enables repeated absorption of light, resulting in increase in the efficiency of DSCs. Since the optical active layer and scattering layer are integrally sintered and the materials have homogeneity, the study on influence of the scattering layer on the photoanode performance should not be limited to the optical properties. This paper investigates the non-optical properties of the scattering layer in detail, including electronic distribution, charge accumulation, transport/recombination dynamics, as well as the inherent influence of these properties on DSCs. The results show that the scattering layer can not only reflect light simply, but also has unique the electronic properties. Just like the optical active layer, the scattering layer can accommodate electrons. The electron transit time and lifetime in the scattering layer are faster than those in the optical active layer after the influence caused by the conduction band movement is removed. It is reasonable to infer that the main transport process occurs in the optical active layer and the recombination rate of the scattering layer is higher than that of the optical active layer within a certain bias range in a DSCs with the double-layer skeleton microstructure of the photoanode. So, the recombination process of electrons through the scattering layer may be a potential recombination path under the working conditions.
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影响因子：
15
作者：
Bisquert, J;Zaban, A;Mora-Seró, I
通讯作者：
Mora-Seró, I
DOI：
10.1524/zpch.2007.221.3.319
发表时间：
2007-03
期刊：
Zeitschrift für Physikalische Chemie
影响因子：
--
作者：
Zhipan Zhang;S. Ito;B. O'Regan;D. Kuang;S. M. Zakeeruddin;P. Liska;Raphaël Charvet;P. Comte;M. Nazeeruddin;P. Péchy;R. Humphry‐Baker;T. Koyanagi;T. Mizuno;M. Grätzel
通讯作者：
Zhipan Zhang;S. Ito;B. O'Regan;D. Kuang;S. M. Zakeeruddin;P. Liska;Raphaël Charvet;P. Comte;M. Nazeeruddin;P. Péchy;R. Humphry‐Baker;T. Koyanagi;T. Mizuno;M. Grätzel
影响因子：
3.3
作者：
Bisquert, J
通讯作者：
Bisquert, J
影响因子：
6.9
作者：
Fabregat-Santiago, F;Bisquert, J;Hagfeldt, A
通讯作者：
Hagfeldt, A
影响因子：
3.7
作者：
De Zhao;T. Peng;Lanlan Lu;P. Cai;P. Jiang;Z. Bian
通讯作者：
De Zhao;T. Peng;Lanlan Lu;P. Cai;P. Jiang;Z. Bian