Analysis of Charge Carrier Kinetics in Nanoporous Systems by Time Resolved Photoconductance Measurements
Analysis of Charge Carrier Kinetics in Nanoporous Systems by Time Resolved Photoconductance Measurements
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通过时间分辨光电导测量分析纳米多孔系统中的载流子动力学
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
M. Kunst
中科院分区：
文献类型：
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作者：
D. Friedrich;M. Kunst
提出了一种准固态染料敏化太阳能电池，其中电解质薄膜取代了传统的液体电解质，达到了3%的太阳能光电转换效率。这证明了正电荷的表面传导的重要性，例如，通过格罗托斯机制非接触瞬态光电导测量进行操作细胞，揭示光致电荷载流子的衰减行为，依赖于外部施加的电位条件。测量结果表明，衰减是由电子注入到前接触，阻碍或增强的空间电荷区的字段控制。此外，氧化还原分子的敏化TiO2薄膜中的光生载流子的衰减的影响进行了分析，发现是依赖于氧化还原对浓度。我们将这种效应归因于碘化物对氧化染料的再生，以这种方式屏蔽了正电荷与注入的电子的可能的复合。
A quasi-solid-state dye-sensitized solar cell is presented, where an electrolyte film replaces the conventional liquid electrolyte, reaching a solar light-to-current conversion efficiency of 3%. This proves the importance of surface conduction of the positive charge, e.g., via the Grotthuss mechanism. Contactless transient photoconductance measurements were performed on operating cells, revealing decay behavior of photoinduced charge carriers, dependent on external applied potential conditions. The measurements show that the decay is controlled by the injection of electrons into the front contact, hindered or enhanced by the field in the space charge region. Furthermore, the influence of redox molecules on the decay of photogenerated charge carriers in sensitized TiO2 films was analyzed and found to be dependent on the redox pair concentration. We ascribe this effect to the regeneration of the oxidized dye by iodide, in this way screening the positive charge from possible recombination with injected elect...
影响因子：
3.7
作者：
Anderson, Assaf Y.;Barnes, Piers R. F.;O'Regan, Brian C.
通讯作者：
O'Regan, Brian C.
影响因子：
18.3
作者：
L. Peter
通讯作者：
L. Peter