Zn(II) versus Ru(II) phthalocyanine-sensitised solar cells. A comparison between singlet and triplet electron injectors
Zn(II) versus Ru(II) phthalocyanine-sensitised solar cells. A comparison between singlet and triplet electron injectors
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DOI：
10.1039/c0ee00083c
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发表时间：
2010-01-01
影响因子：
32.5
通讯作者：
Durrant, James R.
中科院分区：
文献类型：
--
作者：
Listorti, Andrea;Lopez-Duarte, Ismael;Durrant, James R.
在这项研究中，两个不同的酞菁敏化剂-一个Zn（II）Pc（TT-1）和一个Ru（II）Pc（TT-35）在染料敏化光电化学太阳能电池的注入效率和光伏器件性能进行了比较。这些染料具有相似的结构和能量学，但在它们的电子物理学上显著不同，TT-1表现出相当长的寿命单重态，而TT-35表现出快速的系统间交叉到长寿命三重态。采用时间相关单光子计数法（TCSPC）和入射光子转换效率（IPCE）测量方法研究了这两种酞菁染料的注入效率。由两种独立的技术，TCSPC和IPCE分析，确定的注射效率的比较，显示出良好的协议。与TT-1相比，TT-35显示出更高的注射效率。该结果与TT-35三重态相对于TT-1单重激发态的相对能量和寿命一致。TT-35所表现出的高注入效率和长的电子扩散长度使该染料成为染料太阳能电池的有趣的红色吸收敏化剂。
In this study, the injection efficiencies and photovoltaic device performances for two different phthalocyanine sensitisers-a Zn(II) Pc (TT-1) and a Ru(II) Pc (TT-35) in dye sensitized photoelectrochemical solar cells were compared. These dyes have similar structures and energetics, but differ significantly in their photophysics, with TT-1 exhibiting a reasonably long lived singlet state, whilst TT-35 exhibits rapid intersystem crossing to a long lived triplet state. Time correlated single photon counting (TCSPC) approach and incident photon conversion efficiency (IPCE) measurements were applied to study the injection efficiency of these two Pc dyes. A comparison of the injection efficiency determined by the two independent techniques, TCSPC and IPCE analysis, shows a good agreement. TT-35 shows higher injection efficiency in comparison to TT-1. This result is consistent with the relative energy and lifetime of the TT-35 triplet state compared to the TT-1 singlet excited state. The high injection efficiency and the long electron diffusion length shown by TT-35 make this dye an interesting red absorbing sensitizer for dye solar cells.