Metal-Cluster-Sensitized Solar Cells. A New Class of Thiolated Gold Sensitizers Delivering Efficiency Greater Than 2%
Metal-Cluster-Sensitized Solar Cells. A New Class of Thiolated Gold Sensitizers Delivering Efficiency Greater Than 2%
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DOI：
10.1021/ja403807f
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发表时间：
2013-06-19
影响因子：
15
通讯作者：
Kamat, Prashant V.
中科院分区：
文献类型：
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作者：
Chen, Yong-Siou;Choi, Hyunbong;Kamat, Prashant V.
探索了一类新型金属团簇敏化剂用于设计高效太阳能电池。巯基保护的金团簇在可见激发下向TiO2纳米结构注入电子。在am1.5照明下，金簇修饰的介观TiO2薄膜具有3.96 mA/cm(2)的稳定光电流，功率转换效率为2.3%。金属团簇敏化太阳能电池（MCSCs）的整体吸收特性和电池性能与CdS量子点太阳能电池（qdsc）相当。与QDSCs相比，MCSCs的开路电压高达832 mV，填充因子为0.7，表明这些新型敏化剂在下一代太阳能电池中作为半导体量子点和敏化染料的替代品是可行的。首次研究中讨论的MCSCs的优越性能为探索具有更广泛可见光吸收的其他金属团簇奠定了基础。
A new class of metal-cluster sensitizers has been explored for designing high-efficiency solar cells. Thiol-protected gold clusters which exhibit molecular-like properties have been found to inject electrons into TiO2 nanostructures under visible excitation. Mesoscopic TiO2 films modified with gold clusters deliver stable photocurrent of 3.96 mA/cm(2) with power conversion efficiencies of 2.3% under AM 1.5 illumination. The overall absorption features and cell performance of metal-cluster-sensitized solar cells (MCSCs) are comparable to those of CdS quantum-dot-based solar cells (QDSCs). The relatively high open-circuit voltage of 832 mV and fill factor of 0.7 for MCSCs as compared to QDSCs show the viability of these new sensitizers as alternatives to semiconductor QDs and sensitizing dyes in the next generation of solar cells. The superior performance of MCSCs discussed in this maiden study lays the foundation to explore other metal clusters with broader visible absorption.