Dye sensitization solar cells: a critical assessment of the learning curve
Dye sensitization solar cells: a critical assessment of the learning curve
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DOI：
10.1016/j.ccr.2004.05.030
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发表时间：
2004-07
影响因子：
20.6
通讯作者：
H. Tributsch
中科院分区：
文献类型：
--
作者：
H. Tributsch
分析了染料敏化太阳能电池的学习曲线，并与经典太阳能电池的学习曲线进行了初步比较。十年来，纳米结构电池的效率似乎基本上停滞不前，尽管研究取得了重大进展。这个问题进行了分析，发现主要是由于用尽可利用的表面粗糙度因子和新的机械原理的参与，这是科学上仍然几乎没有理解，因此没有很好地优化。这些是通过不可逆动力学而不是通过印迹电场的电荷分离，金属中心的作用，配位化学电子转移和敏化剂的化学背面键合以增加反应性和稳定性，以及前FTO接触作为矢量电子收集界面的功能。确定长期的太阳能电池的稳定性的参数也得到解决。必须详细探讨这些问题。以金属为中心的敏化电子转移无疑是一个优势。此外，由敏化剂再生和产物形成的比率确定的支化系数关键地依赖于TiO 2表面状态，其决定降解动力学。该分析包括固态染料敏化电池，其目前面临着比液体电池更多的关于效率和稳定性的问题。
The learning curve for dye sensitized solar cells is analyzed and tentatively compared with the learning curve for classical solar cells. It appears that for one decade now the efficiency of nano-structured cells has been essentially stagnating despite significant research progress. This problem is analyzed and found to be mainly due to the exhausted exploitability of the surface roughness factor and the involvement of new mechanistic principles, which are scientifically still barely understood and therefore not well optimized. These are charge separation via irreversible kinetics and not via imprinted electrical fields, the role of metal-centered, coordination chemical electron transfer and of chemical back bonding of the sensitizer for increased reactivity and stability as well as the function of the front FTO contact as a vectorial, electron collecting interface. The parameters which determine long-term solar cell stability are also addressed. They will have to be explored in detail. Metal-centered sensitized electron transfer is definitely an advantage. In addition, the branching coefficient determined by the ratio of sensitizer regeneration and product formation is critically dependent on TiO2surface states, which determine degradation kinetics. The analysis includes solid-state dye sensitization cells, which are presently faced with even more problems concerning efficiency and stability than liquid ones.