Orange Zinc Germanate with Metallic Ge-Ge Bonds as a Chromophore-Like Center for Visible-Light-Driven Water Splitting.
Orange Zinc Germanate with Metallic Ge-Ge Bonds as a Chromophore-Like Center for Visible-Light-Driven Water Splitting.
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DOI：
10.1002/anie.201505988
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发表时间：
2015-09
影响因子：
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通讯作者：
Ling Qian;Jianfu Chen;Y. Li;Long Wu;Haifeng Wang;A. Chen;Peijun Hu;Lirong Zheng;H. Yang
中科院分区：
文献类型：
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作者：
Ling Qian;Jianfu Chen;Y. Li;Long Wu;Haifeng Wang;A. Chen;Peijun Hu;Lirong Zheng;H. Yang
太阳能转换装置的效率取决于光子收集器的吸收区域和强度。有机发色团在无机半导体上广泛稳定用于光捕获，但受其与半导体之间界面的限制。本文报道了一种新型的橙色锗酸锌（Zn-Ge-O），它具有类似发色团的结构，可以显着扩大吸收区域。结构表征和理论计算共同揭示了可见光响应的起源可以归因于不寻常的金属Ge-Ge键，其作用方式与有机发色团相似。受益于增强的光收获，橙色Zn-Ge-O展示了太阳能驱动制氢的卓越能力。
The efficiency of solar-energy-conversion devices depends on the absorption region and intensity of the photon collectors. Organic chromophores, which have been widely stabilized on inorganic semiconductors for light trapping, are limited by the interface between the chromophore and semiconductor. Herein we report a novel orange zinc germanate (Zn-Ge-O) with a chromophore-like structure, by which the absorption region can be dramatically expanded. Structural characterizations and theoretical calculations together reveal that the origin of visible-light response can be attributed to the unusual metallic Ge-Ge bonds which act in a similar way to organic chromophores. Benefiting from the enhanced light harvest, the orange Zn-Ge-O demonstrates superior capacity for solar-driven hydrogen production.