Water Splitting: Creation of 3D Textured Graphene/Si Schottky Junction Photocathode for Enhanced Photo‐Electrochemical Efficiency and Stability (Adv. Energy Mater. 29/2019)

Abstract

In article number 1901022, Di‐Yan Wang, Bing Joe Hwang, Chun‐Wei Chen and co‐workers demonstrate a novel three‐dimensional pyramid‐like graphene/p‐Si Schottky junction photocathode for H2 production. The formation of graphene/Si Schottky junctions with a 3D architecture is a promising approach to improve the performance and durability of Si‐based photoelectrochemical systems for water splitting or solar‐to‐fuel conversion.

Plasmonic CuCo/Carbon Dots: An Unconventional Photocatalyst Used for Photocatalytic Overall Water Splitting

“…First, excitation of the CuCo bimetal in the CuCo/CD composite generated SPR, which then decayed into electron–hole pairs by Landau damping. ,,, Electrons produced in the CuCo bimetal phases were then injected into the CDs. This ballistic carrier transfer process induced by SPR excitation is well understood at the metal–semiconductor Schottky interface. , Electrons on the surface of CDs reacted with the absorbed H 2 O to produce H 2 , and holes left on the bimetal also injected H 2 O to produce O 2 . , The key factor to achieve great photocatalytic ability in the present system is the extraordinary charge separation efficiency. The ultrafast electron–hole recombination is a critical drawback for individual plasmonic photocatalysts.…”

“…This ballistic carrier transfer process induced by SPR excitation is well understood at the metal−semiconductor Schottky interface. 46,47 Electrons on the surface of CDs reacted with the absorbed H 2 O to produce H 2 , and holes left on the bimetal also injected H 2 O to produce O 2 . 48,49 The key factor to achieve great photocatalytic ability in the present system is the extraordinary charge separation efficiency.…”