Efficient Sensitization of nanocrystalline TiO2 films by a near-IR-absorbing unsymmetrical zinc phthalocyanine
Efficient Sensitization of nanocrystalline TiO2 films by a near-IR-absorbing unsymmetrical zinc phthalocyanine
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DOI：
10.1002/anie.200603098
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发表时间：
2007-01-01
影响因子：
16.6
通讯作者：
Nazeeruddin, Mohammad K.
中科院分区：
文献类型：
--
作者：
Reddy, Paidi Yella;Giribabu, Lingamallu;Nazeeruddin, Mohammad K.
染料敏化太阳能电池（DSSC）作为传统固态光伏器件的低成本替代品已经引起了极大的关注。[1-12]在这些电池中使用的最成功的电荷转移敏化剂是聚吡啶钌络合物，其在模拟阳光下产生10-11%的太阳能-电能转换效率。[13]尽管如此，基于铼的敏化剂的主要缺点是它们在可见光谱的红色区域中缺乏吸收。酞菁（Pc）因其在红/近红外（Q波段）区域的强吸收而闻名，因此它们是太阳能电池应用的极好替代品。[14-17]除了在太阳光谱的红色/近红外区域提供良好的吸收外，酞菁还可以被调谐为在可见光谱的大区域内透明，从而使其能够用作“光伏窗口”：红色/近红外吸收光伏电池，代替窗口，将允许可见光进入建筑物，同时从光谱的红色/近红外部分收集太阳能。除了直接发电，这也减少了建筑物的太阳能加热，从而减少了对空调机组的需求和电力消耗。几个小组已经测试了酞菁作为宽带隙氧化物半导体的敏化剂，尽管他们都报告了令人印象深刻的功率转换效率。[15 16，18-20]掺入酞菁的电池的低效率似乎是由于激发态下的聚集和缺乏方向性。[21]一种基本的
Dye-sensitized solar cells (DSSCs) have attracted significant attention as low-cost alternatives to conventional solid-state photovoltaic devices.[1–12] The most successful charge-transfer sensitizers employed in these cells are polypyridylruthenium complexes, which yield solar-to-electric power conversion efficiencies of 10–11% with simulated sunlight.[13] In spite of this, the main drawback of ruthenium-based sensitizers is their lack of absorption in the red region of the visible spectrum. Phthalocyanines (Pc) are well known for their intense absorption in the red/near-IR (Qband) regions, therefore they are an excellent alternative for solar-cell applications.[14–17] As well as providing good absorption in the red/near-IR region of the solar spectrum, phthalocyanines can be tuned to be transparent over a large region of the visible spectrum, thereby enabling the possibility of using them as “photovoltaic windows”: a red/near-IR absorbing photovoltaic cell, in place of a window, will allow visible light to enter a building whilst harvesting the solar power from the red/near-IR part of the spectrum. In addition to directly generating power, this also reduces the solar heating of buildings, thereby reducing the demand for, and power consumption of, airconditioning units.Several groups have tested phthalocyanines as sensitizers for wide-bandgap oxide semiconductors, although they have all reported unimpressive power conversion efficiencies.[15, 16, 18–20] The low efficiency of cells incorporating phthalocyanines appears to be due to aggregation and lack of directionality in the excited state.[21] One of the essential