標題: Tunable photoelectrochemical performance of Au/BiFeO3 heterostructure
作者: Huang, Yen-Lin
Chang, Wei Sea
Chien Nguyen Van
Liu, Heng-Jui
Tsai, Kai-An
Chen, Jhih-Wei
Kuo, Ho-Hung
Tzeng, Wen-Yen
Chen, Yi-Chun
Wu, Chung-Lin
Luo, Chih-Wei
Hsu, Yung-Jung
Chu, Ying-Hao
材料科學與工程學系
電子物理學系
Department of Materials Science and Engineering
Department of Electrophysics
公開日期: 2016
摘要: Ferroelectric photoelectrodes, other than conventional semiconductors, are alternative photo-absorbers in the process of water splitting. However, the capture of photons and efficient transfer of photo-excited carriers remain as two critical issues in ferroelectric photoelectrodes. In this work, we overcome the aforementioned issues by decorating the ferroelectric BiFeO3 (BFO) surface with Au nanocrystals, and thus improving the photoelectrochemical (PEC) performance of BFO film. We demonstrate that the internal field induced by the spontaneous polarization of BFO can (1) tune the efficiency of the photo-excited carriers\' separation and charge transfer characteristics in bare BFO photoelectrodes, and (2) modulate an extra optical absorption within the visible light region, created by the surface plasmon resonance excitation of Au nanocrystals to capture more photons in the Au/BFO heterostructure. This study provides key insights for understanding the tunable features of PEC performance, composed of the heterostructure of noble metals and ferroelectric materials.
URI: http://dx.doi.org/10.1039/c6nr04997d
http://hdl.handle.net/11536/134164
ISSN: 2040-3364
DOI: 10.1039/c6nr04997d
期刊: NANOSCALE
Volume: 8
Issue: 34
起始頁: 15795
結束頁: 15801
顯示於類別:期刊論文