光催化
异质结
半导体
材料科学
光电子学
锐钛矿
相(物质)
光电效应
金红石
p-n结
电场
能量转换效率
载流子
工程物理
纳米技术
化学工程
化学
物理
量子力学
工程类
催化作用
有机化学
生物化学
标识
DOI:10.1021/acs.jpcc.8b06039
摘要
Photogenerated charge separation is one of the key factors determining the solar energy conversion efficiency in photocatalysis and photoelectrocatalysis. Fabrication of phase junction has been demonstrated to be an effective strategy to construct the internal electric field for the charge separation. Phase junction is essentially a heterojunction, but more common in semiconductor-based photoelectric conversion systems, because most semiconductors exhibit the polymorphous structures. Because of the similar crystal structure between the two phases, phase junctions are more easily formed. The application of phase junction in photocatalysis and photoelectrocatalysis, especially the anatase–rutile TiO2 and α–β Ga2O3 phase junction, are summarized in this Feature Article. The internal electrical field across the phase junction provides enough driving force for the improved charge separation, evidenced by the time and spatial resolved characterizations. We conclude with a summary and perspectives on the design and application of phase junction in solar energy conversion systems.
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