Flexible Heteroepitaxy Photoelectrode for Photo-electrochemical Water Splitting

Le Thi Quynh; Chien Van Nguyen; W. Y. Tzeng; Chun Wei Huang; Yu Hong Lai; Jhih Wei Chen; Kai An Tsai; Chung Lin Wu; Wen Wei Wu; Chih Wei Luo; Yung Jung Hsu; Ying Hao Chu

doi:10.1021/acsaem.8b00645

Flexible Heteroepitaxy Photoelectrode for Photo-electrochemical Water Splitting

Le Thi Quynh, Chien Van Nguyen, W. Y. Tzeng, Chun Wei Huang, Yu Hong Lai, Jhih Wei Chen, Kai An Tsai, Chung Lin Wu, Wen Wei Wu, Chih Wei Luo, Yung Jung Hsu, Ying Hao Chu

Department of Physics

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

Abstract

MICAtronics represents a new research direction by taking the advantages of good mechanical flexibility and optical transparency of muscovite mica, leading to a new platform to use oxide heteroepitaxy for novel transparent soft technology. Here we report a model flexible photoelectrode for photo-electrochemical (PEC) water splitting based on Fe₂O₃/ZnO/mica heteroepitaxy. The heteroepitaxy was confirmed by a combination of X-ray diffraction and transmission electron microscopy. The PEC performance of this flexible and semitransparent photoelectrode under various bending states was investigated. We found that the photocurrent of the heteroepitaxial system was enhanced by three times relative to pure ZnO and Fe₂O₃ under visible-light irradiation, and the heteroepitaxial photoelectrodes retain their photocurrent after continuous bending in cycling (>3000 cycles) with a smallest bending radius of 3.5 mm. The energy band alignment and charge dynamics under light excitation were characterized to understand the mechanism of the enhanced PEC performance. This study provides a new platform for design and fabrication of a flexible transparent photoelectrode in the harvest of solar energy based on oxide heteroepitaxy.

Original language	English
Pages (from-to)	3900-3907
Number of pages	8
Journal	ACS Applied Energy Materials
Volume	1
Issue number	8
DOIs	https://doi.org/10.1021/acsaem.8b00645
Publication status	Published - 2018 Aug 27

All Science Journal Classification (ASJC) codes

Chemical Engineering (miscellaneous)
Energy Engineering and Power Technology
Electrochemistry
Materials Chemistry
Electrical and Electronic Engineering

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10.1021/acsaem.8b00645

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title = "Flexible Heteroepitaxy Photoelectrode for Photo-electrochemical Water Splitting",

abstract = "MICAtronics represents a new research direction by taking the advantages of good mechanical flexibility and optical transparency of muscovite mica, leading to a new platform to use oxide heteroepitaxy for novel transparent soft technology. Here we report a model flexible photoelectrode for photo-electrochemical (PEC) water splitting based on Fe2O3/ZnO/mica heteroepitaxy. The heteroepitaxy was confirmed by a combination of X-ray diffraction and transmission electron microscopy. The PEC performance of this flexible and semitransparent photoelectrode under various bending states was investigated. We found that the photocurrent of the heteroepitaxial system was enhanced by three times relative to pure ZnO and Fe2O3 under visible-light irradiation, and the heteroepitaxial photoelectrodes retain their photocurrent after continuous bending in cycling (>3000 cycles) with a smallest bending radius of 3.5 mm. The energy band alignment and charge dynamics under light excitation were characterized to understand the mechanism of the enhanced PEC performance. This study provides a new platform for design and fabrication of a flexible transparent photoelectrode in the harvest of solar energy based on oxide heteroepitaxy.",

author = "Quynh, {Le Thi} and {Van Nguyen}, Chien and Tzeng, {W. Y.} and Huang, {Chun Wei} and Lai, {Yu Hong} and Chen, {Jhih Wei} and Tsai, {Kai An} and Wu, {Chung Lin} and Wu, {Wen Wei} and Luo, {Chih Wei} and Hsu, {Yung Jung} and Chu, {Ying Hao}",

note = "Funding Information: This work was supported by the Ministry of Science and Technology, Taiwan (Grants MOST 106-2628-E-009-001-MY2 and MOST 106-2119-M-009-011-MY3).",

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AU - Lai, Yu Hong

AU - Chen, Jhih Wei

AU - Tsai, Kai An

AU - Wu, Chung Lin

AU - Wu, Wen Wei

AU - Luo, Chih Wei

AU - Hsu, Yung Jung

AU - Chu, Ying Hao

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N2 - MICAtronics represents a new research direction by taking the advantages of good mechanical flexibility and optical transparency of muscovite mica, leading to a new platform to use oxide heteroepitaxy for novel transparent soft technology. Here we report a model flexible photoelectrode for photo-electrochemical (PEC) water splitting based on Fe2O3/ZnO/mica heteroepitaxy. The heteroepitaxy was confirmed by a combination of X-ray diffraction and transmission electron microscopy. The PEC performance of this flexible and semitransparent photoelectrode under various bending states was investigated. We found that the photocurrent of the heteroepitaxial system was enhanced by three times relative to pure ZnO and Fe2O3 under visible-light irradiation, and the heteroepitaxial photoelectrodes retain their photocurrent after continuous bending in cycling (>3000 cycles) with a smallest bending radius of 3.5 mm. The energy band alignment and charge dynamics under light excitation were characterized to understand the mechanism of the enhanced PEC performance. This study provides a new platform for design and fabrication of a flexible transparent photoelectrode in the harvest of solar energy based on oxide heteroepitaxy.

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Flexible Heteroepitaxy Photoelectrode for Photo-electrochemical Water Splitting

Abstract

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