标题:Enhancing Water-Splitting Efficiency Using a Zn/Sn-Doped PN Photoelectrode of Pseudocubic α-Fe2O3 Nanoparticles
作者:Yang J.-X.; Meng Y.; Tseng C.-M.; Huang Y.-K.; Lin T.-M.; Wang Y.-M.; Deng J.-P.; Wu H.-C.;等
作者机构:[Yang, J.-X] Institute of Materials Science and Engineering, National Central University, Taoyuan, 32001, Taiwan, Department of Materials Science and 更多
通讯作者:Hung, WH(hungwh@ncu.edu.tw)
通讯作者地址:[Hung, W.-H] High Entropy Materials Center, National Tsing Hua University, Center for Plasma and Thin Film Technologies, Ming Chi University of Techno 更多
来源:Nanoscale Research Letters
出版年:2020
卷:15
期:1
DOI:10.1186/s11671-020-03362-5
关键词:p-n junction; Pseudocubic α-Fe2O3; Solar energy; Water splitting
摘要:α-Phase hematite photoelectrodes can split water. This material is nontoxic, inexpensive, and chemically stable; its low energy gap of 2.3 eV absorbs light with wavelengths lower than 550 nm, accounting for approximately 30% of solar energy. Previously, we reported polyhedral pseudocubic α-Fe2O3 nanocrystals using a facile hydrothermal route to increase spatial charge separation, enhancing the photocurrent of photocatalytic activity in the water-splitting process. Here, we propose a p-n junction structure in the photoanode of pseudocubic α-Fe2O3 to improve short carrier diffusion length, which limits its photocatalytic efficiency. We dope Zn on top of an Fe2O3 photoanode to form a layer of p-type semiconductor material; Sn is doped from the FTO substrate to form a layer of n-type semiconductor material. The p-n junction, n-type Fe2O3:Sn and p-type Fe2O3:Zn, increase light absorption and charge separation caused by the internal electric field in the p-n junction. © 2020, The Author(s).
收录类别:SCOPUS
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85086524668&doi=10.1186%2fs11671-020-03362-5&partnerID=40&md5=24f844cfb32c8384d7f4ab041935e181
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