在半孔NiO表面上的染料和催化剂之间超快的电子转移
Allison M Brown1, Liisa J Antila1, Mohammad Mirmohades1
1Department of Chemistry - Ångström Laboratory, Uppsala University , Box 523, 75120 Uppsala, Sweden.
Journal of the American Chemical Society
|June 18, 2016
概括
这项研究显示了染料敏感太阳能燃料装置 (DSSFD) 的快速电子转移. 在NiO薄膜上使用氨酸染料和铁催化剂,可为潜在的光阴极应用提供高效的电荷分离.
科学领域:
- 材料科学
- 摄影化学
- 可再生能源
背景情况:
- 染料敏感太阳能燃料装置 (DSSFD) 需要在半导体,染料和催化剂之间进行高效的电荷传输.
- 控制接口和表面电荷动态对于优化DSSFD性能至关重要.
研究的目的:
- 研究与C343和[FeFe]-质子还原催化剂共敏感的p型NiO薄膜中的光诱导电子转移过程.
- 评估潜在的DSSFD应用的界面和表面电荷转移的效率和时间表.
主要方法:
- 使用过渡光学光谱探测超快电子转移动态.
- 采用p型NiO薄膜与氨酸C343染料和生物启发的[FeFe](mcbdt) ((CO) 6质子还原催化剂.
主要成果:
- 观察到从NiO到激发的氨酸C343染料的超快速界面电子转移 (孔注射).
- 从被减少的染料 (C343-) 到共吸收的[FeFe]催化剂 (t1/2 ≈ 10 ps) 进行了快速和高效的表面电子转移.
- 在电荷重组之前, 检测到减少催化剂的持续光谱特征.
结论:
- 这项研究证实了NiO薄膜上从染料到催化剂的快速表面电子转移.
- 电荷分离状态的相对较长寿命表明了这些系统在DSSFD光阴极中的潜力.
- 强调生物启发的催化剂和分子染料对有效的太阳能燃料产生有希望.
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