3D highly efficient photonic micro concave-pit arrays for enhanced solar water splitting.

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ID: 42813
2019
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Abstract
The construction of three-dimensional (3D) photonic micro/nanostructures is regarded as one of the most promising approaches to develop highly efficient photoelectrodes for solar water splitting. Here, we report the design and fabrication of an indium tin oxide glass with 3D micro concave-pit arrays (MCPAs) as an effective photonic substrate for dramatically enhanced photoelectrochemical (PEC) water splitting. Compared with the planar counterpart, more than three-fold photocurrent density can be obtained for the 3D photoelectrodes with In2S3 nanosheet arrays grown on the inner surfaces of the MCPAs, mainly ascribable to their largely improved light trapping ability and increased surface area for charge separation and extraction. The PEC performance is further elevated by constructing an effective In2S3/ZnO heterojunction to accelerate the photocarrier separation. As a result, the 3D MCPA-based photoanodes demonstrate a maximum incident photon to current efficiency of 11.7% at 380 nm, which is about four times higher than that of the planar counterpart. The significant advancement demonstrated here provides a facile and low-cost route for the large-scale fabrication of 3D photonic electrodes aiming to achieve highly efficient PEC water splitting.
Reference Key
li20193dnanoscale Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Li, Ming;Chen, Le;Zhou, Chao;Jin, Chengchao;Su, Yanjie;Zhang, Yafei;
Journal Nanoscale
Year 2019
DOI
10.1039/c9nr05778a
URL
Keywords
electroencephalogram (eeg) acute hepatic encephalopathy (ahe) generalized periodic discharges liley model neural computational model particle filtering

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