Novel thin film composites and co-catalysts for visible light-induced water splitting

在这项建议的框架内，我们申请资助用于水分解的新型和有前景的光电催化薄膜复合系统的研究和开发。我们复合系统的独特之处在于：(I)开发Taon-、Ba3Ta5O15-和BiVO4基异质薄膜作为光阳极，其禁带宽度、能级和电导率可调，(Ii)采用器件级黄铜矿基薄膜和硅(也与串联太阳能电池相结合)作为新型复合光电阴极和复合光阳极，(Iii)开发用于改善HER(析氢)和OER(析氧)的新型电催化剂，以及(Iv)用化学稳定的超薄碳化层进行表面钝化，以避免光腐蚀，提高长期稳定性。有了这些复合材料，我们设想开发一种新的半电池，结合到一种新的测试设备组件中，使用我们最有效的光电电极来实现可见光驱动的水分解。

Within the framework of this proposal we apply for funding of research and development of novel and promising photoelectrocatalytic thin film composite systems for water splitting. The unique characteristics of our composite systems are (i) development of TaON-, Ba3Ta5O15-, and BiVO4-based heterogeneous thin films as photoanodes with adjustable band gap energies, band-energy levels and conductivities, (ii) adaptation of device-grade chalcopyrite-based thin films and silicon - also in combination with tandem solar cells - as novel composite photocathodes and Composite photoanodes, (iii) development of new electrocatalysts for improvement of HER (hydrogen evolution) and OER (oxygen evolution), and (iv) surface passivation by ultrathin chemically stable carbonaceous layers to avoid photocorrosion and to improve long-term stability. With these composite materials we envisage the development of new half-cells combined to a novel test device assembly using our most efficient photoelectrodes for the purpose of visible light-driven water splitting.