具有扭曲四角形几何学的蓝铜模型综合体,在染料敏感太阳能电池中充当有效的电子转移媒介
Shigeki Hattori1, Yuji Wada, Shozo Yanagida
1Department of Material and Life Science, Graduate School of Engineering, Osaka University, SORST, Japan.
Journal of the American Chemical Society
|June 30, 2005
概括
蓝铜模型复合体显示不同电子自我交换率,影响它们在染料敏感太阳能电池 (DSSC) 的性能. [Cu(dmp) ]2+/+复合体表现出最高的光能转换效率,性能优于传统的化物/三化物氧化还原对.
科学领域:
- 无机化学 无机化学 有机化学
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
背景情况:
- 蓝铜模型复合体对于理解电子转移过程至关重要.
- 染料敏感太阳能电池 (DSSC) 的效率在很大程度上取决于所使用的氧化还原对.
- 马库斯理论为分析电子转移动力学提供了一个框架.
研究的目的:
- 确定三个蓝铜模型复合体的电子自我交换速率常数: [Cu(SP) ((mmt) ] ((0/-), [Cu(dmp) 2) ((2+/+) 和 [Cu(phen) 2) ((2+/+).
- 为了评估这些铜复合体在DSSC中作为氧化还原对的性能.
- 为了比较基于铜复合体的DSSC的光电化学反应与使用常规的化物/三化物 (I3-/I-) 氧化还原对.
主要方法:
- 用铁衍生物和马库斯理论测量了电子转移速率常数.
- 用染料敏感的太阳能电池是使用铜复合物作为氧化还原媒介来构建的.
- 在模拟的太阳光下记录了光电化学反应,包括光能转换效率 (eta) 和开放电路电压.
主要成果:
- 电子自我交换速率常数遵循的顺序是:[Cu(phen) 2] 2+/+) < [Cu(SP) mmt) ]0/-) < [Cu(dmp) 2] 2+/+),与结构变化相关.
- 在100mW/cm2时,DSSC光能转换效率 (eta) 为[Cu(phen) 2] 2+/+的0.1%,[Cu(dmp) 2] 2+/+的1.4%,[Cu(SP) 2+/+的1.3%,[Cu(mmt) 0/-) 的1.3%.
- 在20mW/cm2的[Cu(dmp) 2) ((2+/+) 获得了2.2%的最大eta,显示出比I3-/I-对更高的开放电路电压.
结论:
- 该研究阐明了蓝铜复合体的电子自我交换率,结构动态和DSSC性能之间的关系.
- [Cu ((dmp) 2)) ((2+/+) 在DSSC中显示出作为有效的氧化还原对的显著潜力,比传统系统提供更好的性能.
- 这些发现有助于开发用于先进太阳能转换技术的新型氧化还原介质.
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