A hierarchical dual-phase photoetching template route to assembling functional layers on Si photoanode with tunable nanostructures for efficient water splitting
A hierarchical dual-phase photoetching template route to assembling functional layers on Si photoanode with tunable nanostructures for efficient water splitting
复制标题
分层双相光刻模板路线，在硅光阳极上组装功能层，具有可调谐纳米结构，以实现高效水分解
DOI：
10.1016/j.apcatb.2019.118115
复制
发表时间：
2019-12-15
影响因子：
22.1
通讯作者：
Zou, Zhigang
中科院分区：
文献类型：
--
作者：
Li, Yang;Xu, Guangzhou;Zou, Zhigang
Surface functionalization is closely associated with the light harvesting and the charge separation, transfer, and injection efficiencies of water-splitting photoelectrode. Here, a dual-phase photoetching template with hierarchical structure, polyphenylsilsequioxane nanopillars and bicontinuous polyphenylsilsequioxane + polystyrene network layer, is patterned on the Si photoanode via a spinodal phase separation mechanism. Controllably photoetching the polymer template allows us to physically deposit functional layers with tunable nanostructures from net to dispersed dot. As a demonstration, the broken Ni/NiOx net modified Si photoanode exhibits a low onset potential of 0.93 V-RHE, a high saturated photocurrent density of 40 mA cm(-2) and a stability of 50 h in 1.0 M K-borate under AM1.5 G illumination, resulting from the inhomogeneous barrier height driven efficient charge extraction and low light loss by the dispersed surface modification. The proposed dual-phase lithographic template may open a new avenue to easily assemble functional layers on photoelectrodes for efficient solar energy conversion.
