Surface Passivation of GaN Nanowires for Enhanced Photoelectrochemical Water-Splitting.
作者： Purushothaman Varadhan , Hui-Chun Fu , Davide Priante , Jose Ramon Duran Retamal , Chao Zhao
DOI: 10.1021/ACS.NANOLETT.6B04559
关键词:
摘要: Hydrogen production via photoelectrochemical water-splitting is a key source of clean and sustainable energy. The use one-dimensional nanostructures as photoelectrodes desirable for applications due to the ultralarge surface areas, lateral carrier extraction schemes, superior light-harvesting capabilities. However, unavoidable states nanostructured materials create additional charge trapping centers energy barriers at semiconductor–electrolyte interface, which severely reduce solar-to-hydrogen conversion efficiency. In this work, we address issue in GaN nanowire by employing simple low-cost treatment method, utilizes an organic thiol compound (i.e., 1,2-ethanedithiol). surface-treated photocathode showed enhanced photocurrent density −31 mA/cm2 −0.2 V versus RHE with incident photon-to-current efficiency 18.3%, whereas untreated nanowires...
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