Synthesis and photovoltaic charateristics of Ag-Ag2Se sensitized ZnO flower-rod heterostructures - Details

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Abstract：

ZnO　flower-rod　ordered　arrays　(ZFRs)　were　synthesized　via　a　liquid　phase　method,　and　the　ZFRs　were　sensitized　with　Ag　and　Ag2Se　quantum　dots　(AA-ZFRs)　by　ion　exchange.　Scanning　electron　microscopy　(SEM),　powder　X-ray　diffraction　(XRD),　energy　dispersive　X-ray　spectra　(EDS),　and　transmission　electron　microscopy　(TEM)　were　used　to　characterize　Ag　and　Ag2Se　sensitized　ZnO　flower-rods　(AA-ZFRs).　And　the　photoelectrochemical　properties　and　quantum　efficiency　were　also　investigated.　The　results　indicate　that　the　optical　absorption　of　AA-ZFRs　can　be　controllably　tuned　to　cover　almost　the　entire　visible　spectrum.　The　sensitization　with　Ag-Ag2Se　restrains　the　recombination　of　photogenerated　electron-hole　pairs　due　to　the　heterojunction　between　Ag-Ag2Se　and　ZFRs,　and　enhances　the　incident　photon-to-electron　conversion　efficiency.　Thus,　the　as-prepared　AA-ZFRs　exhibit　a　higher　open-circuit　photovoltage　(-0.77　V　Ag/AgCl)　and　short-circuit　photocurrent　(0.64　mA·cm-2)　under　visible　light.

Keyword：

Photoelectrochemical properties; Quantum dots; ZnO flower-rod heterostructures

Community：

[ 1 ] [Han, Z.-Z.]College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350108, China
[ 2 ] [Han, Z.-Z.]Institute of Research on the Functional Materials, Fuzhou University, Fuzhou 350002, China
[ 3 ] [Wei, L.-Y.]College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350108, China
[ 4 ] [Wei, L.-Y.]Institute of Research on the Functional Materials, Fuzhou University, Fuzhou 350002, China
[ 5 ] [Guo, Y.]College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350108, China
[ 6 ] [Guo, Y.]Institute of Research on the Functional Materials, Fuzhou University, Fuzhou 350002, China
[ 7 ] [Pan, H.-B.]College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350108, China
[ 8 ] [Pan, H.-B.]Institute of Research on the Functional Materials, Fuzhou University, Fuzhou 350002, China
[ 9 ] [Chen, J.-Z.]College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350108, China
[ 10 ] [Chem, N.-S.]College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350108, China
[ 11 ] [Chem, N.-S.]Institute of Research on the Functional Materials, Fuzhou University, Fuzhou 350002, China

Reprint 's Address：

[Pan, H.-B.]College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350108, China

Email：

hbpan@fzu.edu.cn

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Source ：

Chinese Journal of Inorganic Chemistry

ISSN： 1001-4861

Year： 2013

Issue： 9

Volume： 29

Page： 1856-1862

0 . 7 4 2

JCR@2013

0 . 8 0 0

JCR@2023

JCR Journal Grade：4

CAS Journal Grade：4

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ESI Highly Cited Papers on the List： 0 Unfold All

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30 Days PV： 0

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