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https://hdl.handle.net/20.500.14094/90009371

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メタデータID
90009371
アクセス権
open access
出版タイプ
Accepted Manuscript
タイトル
Solution-processed silicon quantum dot photocathode for hydrogen evolution
著者
Takada, Miho ; Inoue, Kosuke ; Sugimoto, Hiroshi ; Fujii, Minoru
著者名
Takada, Miho
著者名
Inoue, Kosuke
著者ID
A2035
研究者ID
1000040793998
KUID
https://kuid-rm-web.ofc.kobe-u.ac.jp/search/detail?systemId=ea5d85f0a07a9354520e17560c007669
著者名
Sugimoto, Hiroshi
杉本, 泰
スギモト, ヒロシ
所属機関名
工学研究科
著者ID
A1198
研究者ID
1000000273798
KUID
https://kuid-rm-web.ofc.kobe-u.ac.jp/search/detail?systemId=c329d986b41188dd520e17560c007669
著者名
Fujii, Minoru
藤井, 稔
フジイ, ミノル
所属機関名
工学研究科
言語
English (英語)
収録物名
Nanotechnology
巻(号)
32(48)
ページ
485709
出版者
IOP Publishing
刊行日
2021-11-26
公開日
2022-12-01
抄録
The photoelectrochemical response of a photocathode made from a colloidal solution of boron (B) and phosphorus (P) codoped silicon (Si) quantum dots (QDs) 2–11 nm in diameters is studied. Since codoped Si QDs are dispersible in alcohol and water due to the hydrophilic surface, a photoelectrode with a smooth surface is produced by drop-coating the QD solution on an indium tin oxide substrate. The codoping provides high oxidation resistance to Si QDs and makes the electrode operate as a photocathode. The photoelectrochemical response of a Si QD photoelectrode depends strongly on the size of QDs; there is a transition from anodic to cathodic photocurrent around 4 nm in diameter. Below the size, anodic photocurrent due to self-oxidation of Si QDs is observed, while above the size, cathodic photocurrent due to electron transfer across the interface is observed. The cathodic photocurrent increases with increasing the size, and in some samples, it is observed for more than 3000 s under intermittent light irradiation.
キーワード
photocathode
quantum dot
silicon
hydrogen evolution
カテゴリ
工学研究科
学術雑誌論文
権利
© 2021 IOP Publishing Ltd. This is the Accepted Manuscript version of an article accepted for publication in Nanotechnology. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://doi.org/10.1088/1361-6528/ac09e0
関連情報
DOI
https://doi.org/10.1088/1361-6528/ac09e0