High-performance a -Si/c-Si heterojunction photoelectrodes for photoelectrochemical oxygen and hydrogen evolution

Handle URI:
http://hdl.handle.net/10754/564171
Title:
High-performance a -Si/c-Si heterojunction photoelectrodes for photoelectrochemical oxygen and hydrogen evolution
Authors:
Wang, Hsin Ping; Sun, Ke; Noh, Sun Young; Kargar, Alireza; Tsai, Meng Lin; Huang, Ming Yi; Wang, Deli; He, Jr-Hau ( 0000-0003-1886-9241 )
Abstract:
Amorphous Si (a-Si)/crystalline Si (c-Si) heterojunction (SiHJ) can serve as highly efficient and robust photoelectrodes for solar fuel generation. Low carrier recombination in the photoelectrodes leads to high photocurrents and photovoltages. The SiHJ was designed and fabricated into both photoanode and photocathode with high oxygen and hydrogen evolution efficiency, respectively, by simply coating of a thin layer of catalytic materials. The SiHJ photoanode with sol-gel NiOx as the catalyst shows a current density of 21.48 mA/cm2 at the equilibrium water oxidation potential. The SiHJ photocathode with 2 nm sputter-coated Pt catalyst displays excellent hydrogen evolution performance with an onset potential of 0.640 V and a solar to hydrogen conversion efficiency of 13.26%, which is the highest ever reported for Si-based photocathodes. © 2015 American Chemical Society.
KAUST Department:
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division; Electrical Engineering Program; Nano Energy Lab
Publisher:
American Chemical Society (ACS)
Journal:
Nano Letters
Issue Date:
13-May-2015
DOI:
10.1021/nl5041463
Type:
Article
ISSN:
15306984
Sponsors:
D.W. acknowledges the financial support for this work by the National Science Foundation (CBET1236155). D.W. thanks Drs. R. Rao and B. Fruhberger from Qualcomm Institute of UCSD for their unconditional support. The authors thank the staff of UCSD Nano3 facilities for their timely and professional support. The authors acknowledge KAUST, National Science Council of Taiwan and National Taiwan University.
Appears in Collections:
Articles; Electrical Engineering Program; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorWang, Hsin Pingen
dc.contributor.authorSun, Keen
dc.contributor.authorNoh, Sun Youngen
dc.contributor.authorKargar, Alirezaen
dc.contributor.authorTsai, Meng Linen
dc.contributor.authorHuang, Ming Yien
dc.contributor.authorWang, Delien
dc.contributor.authorHe, Jr-Hauen
dc.date.accessioned2015-08-03T12:35:00Zen
dc.date.available2015-08-03T12:35:00Zen
dc.date.issued2015-05-13en
dc.identifier.issn15306984en
dc.identifier.doi10.1021/nl5041463en
dc.identifier.urihttp://hdl.handle.net/10754/564171en
dc.description.abstractAmorphous Si (a-Si)/crystalline Si (c-Si) heterojunction (SiHJ) can serve as highly efficient and robust photoelectrodes for solar fuel generation. Low carrier recombination in the photoelectrodes leads to high photocurrents and photovoltages. The SiHJ was designed and fabricated into both photoanode and photocathode with high oxygen and hydrogen evolution efficiency, respectively, by simply coating of a thin layer of catalytic materials. The SiHJ photoanode with sol-gel NiOx as the catalyst shows a current density of 21.48 mA/cm2 at the equilibrium water oxidation potential. The SiHJ photocathode with 2 nm sputter-coated Pt catalyst displays excellent hydrogen evolution performance with an onset potential of 0.640 V and a solar to hydrogen conversion efficiency of 13.26%, which is the highest ever reported for Si-based photocathodes. © 2015 American Chemical Society.en
dc.description.sponsorshipD.W. acknowledges the financial support for this work by the National Science Foundation (CBET1236155). D.W. thanks Drs. R. Rao and B. Fruhberger from Qualcomm Institute of UCSD for their unconditional support. The authors thank the staff of UCSD Nano3 facilities for their timely and professional support. The authors acknowledge KAUST, National Science Council of Taiwan and National Taiwan University.en
dc.publisherAmerican Chemical Society (ACS)en
dc.subjecthydrogen evolutionen
dc.subjectoxygen evolutionen
dc.subjectSi heterojunction photoelectrodesen
dc.subjectsolar to hydrogen conversion efficiencyen
dc.subjectsolar to oxygen conversion efficiencyen
dc.titleHigh-performance a -Si/c-Si heterojunction photoelectrodes for photoelectrochemical oxygen and hydrogen evolutionen
dc.typeArticleen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.contributor.departmentElectrical Engineering Programen
dc.contributor.departmentNano Energy Laben
dc.identifier.journalNano Lettersen
dc.contributor.institutionDepartment of Electrical and Computer Engineering, University of California-San Diego, 9500 Gilman DriveSan Diego, CA, United Statesen
dc.contributor.institutionAdvanced Technology Department, AU Optronic CorporationTaichung, Taiwanen
dc.contributor.institutionMaterials Science and Engineering Program, University of California-San Diego, 9500 Gilman DriveSan Diego, CA, United Statesen
dc.contributor.institutionQualcomm Institute, University of California-San Diego, 9500 Gilman DriveSan Diego, CA, United Statesen
dc.contributor.institutionInstitute of Photonics and Optoelectronics, Department of Electrical Engineering, National Taiwan UniversityTaipei, Taiwanen
kaust.authorHe, Jr-Hauen
kaust.authorWang, Hsin Pingen
kaust.authorTsai, Meng Linen
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