SnO2-Based Dye-Sensitized Hybrid Solar Cells Exhibiting Near Unity Absorbed Photon-to-Electron Conversion Efficiency
SnO2-Based Dye-Sensitized Hybrid Solar Cells Exhibiting Near Unity Absorbed Photon-to-Electron Conversion Efficiency
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DOI：
10.1021/nl903809r
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发表时间：
2010-04-01
期刊：
影响因子：
10.8
通讯作者：
Ducati, Caterina
中科院分区：
文献类型：
--
作者：
Snaith, Henry J.;Ducati, Caterina
提高混合有机无机光伏电池的太阳能光收集和光子到电子转换效率是关键的挑战。基于二氧化钛的固态混合太阳能电池在将可见光光子转化为电子方面效率适中，但仍然存在较大的电损失。需要一种基于材料的范式转变来显著提高这些设备的性能。在这里，我们提出了一项固态染料敏化太阳能电池（SDSCs）的研究，该电池采用分子空穴转运体和介孔氧化锡电极来代替通常使用的二氧化钛。我们研究了用不同的氧化物处理SnO2表面的影响，发现MgO“钝化”的SnO2电极在宽光谱范围内表现出前所未有的吸收光子到电子的转换效率。通过对TiO2和MgO进行双重表面处理，可以调节太阳能电池的光电压、填充因子和效率，从而使可见光吸收电池的太阳能-电全太阳能转换效率达到3%。
Improving the solar light harvesting and photon-to-electron conversion efficiency for hybrid, organic inorganic photovoltaics are critical challenges. Titania based solid-state hybrid solar cells are moderately efficient at converting visible photons to electrons, but major electrical losses still remain. A material based paradigm shift is required to dramatically enhance the performance of these devices. Here, we present an investigation into solid-state dye-sensitized solar cells (SDSCs) incorporating a molecular hole-transporter and mesoporous tin oxide electrodes, in place of titania usually employed. We investigate the influence of treating the surface of the SnO2 with different oxides and find that MgO "passivated" SnO2 electrodes demonstrate an unprecedented absorbed photon-to-electron conversion efficiency of near unity across a broad spectral range. A dual surface treatment of TiO2 followed by MgO enables tuning of the solar cell photovoltage, fill factor, and efficiency with visible light absorbing cells delivering 3% solar-to-electrical full sun power conversion efficiency.