Expanding depletion region via doping: Zn-doped Cu2O buffer layer in Cu2O photocathodes for photoelectrochemical water splitting

被引：0
|
作者：
Kangha Lee
Cheol-Ho Lee
Jun Young Cheong
Seokwon Lee
Il-Doo Kim
Han-Ik Joh
Doh Chang Lee
机构：
[1] Korea Advanced Institute of Science and Technology (KAIST),Department of Chemical and Biomolecular Engineering (BK21+ Program), KAIST Institute for the Nanocentury
[2] Korea Advanced Institute of Science and Technology (KAIST),Department of Materials Science and Engineering
[3] Korea Institute of Science and Technology (KIST),Carbon Convergence Materials Research Center, Institute of Advanced Composite Materials
[4] Konkuk University,Department of Extreme Energy Engineering
来源：
Korean Journal of Chemical Engineering | 2017年 / 34卷
关键词：
Cu; O; Zn-doped Cu; O; Photocathode; Water Splitting; Photoelectrochemistry;
D O I：
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中图分类号：
学科分类号：
摘要：
We report photoelectrochemical hydrogen evolution reaction using a Cu2O-based photocathode with a layer doped with Zn ions. The doping results in the shift of the onset flat-band potential of the photocathode, likely a consequence of maximized band-bending in the Cu2O/Zn : Cu2O heterojunction. Systematic electrochemical analysis reveals that expansion of depletion region is responsible for the enhanced photoelectrochemical performance, e.g., the increase of photocurrent and reduced internal resistance.
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页码：3214 / 3219
页数：5
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