JP2014137968A - 光電極、光電変換素子及び光電極の製造方法 - Google Patents
光電極、光電変換素子及び光電極の製造方法 Download PDFInfo
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- JP2014137968A JP2014137968A JP2013007511A JP2013007511A JP2014137968A JP 2014137968 A JP2014137968 A JP 2014137968A JP 2013007511 A JP2013007511 A JP 2013007511A JP 2013007511 A JP2013007511 A JP 2013007511A JP 2014137968 A JP2014137968 A JP 2014137968A
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- photoelectrode
- layer
- manganese oxide
- fibrous carbon
- photoelectric conversion
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Classifications
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Abstract
【解決手段】導電性基板と、前記導電性基板上に形成された繊維状炭素層と、前記繊維状炭素層上に形成されたバーネサイト型層状マンガン酸化物層とを有する光電極、前記光電極と電解質層と対極とを備えた光電変換素子及び前記光電極を備えた光充電レドックスキャパシタ。
【選択図】図1
Description
実施例1と同様に作製したMWCNT層を形成したFTO基板を2mM過マンガン酸カリウムを含む水溶液に浸漬し、0V(vs.銀/塩化銀)で通過電気量が20mC/cm2になるまで電気化学分解した。このようにして電極基板上に二酸化マンガン薄膜を形成し、洗浄、真空乾燥した。得られた二酸化マンガン薄膜は、非晶質の二酸化マンガン(AmorMnO2)であり、AmorMnO2層の厚みは、約10nmであった。透過型電子顕微鏡の観察によると、FTO基板上に多層カーボンナノチューブ(MWCNT)がランダムに入り組んだ三次元構造を形成し、非晶質の二酸化マンガン層が多層カーボンナノチューブ(MWCNT)表面を被覆するように形成されていた。得られた電極(AmorMnO2/MWCNT/FTO電極)を、5Mエタノールを含む0.5M硫酸ナトリウム水溶液中に浸漬し、対極に白金電極を用いて、+1.0Vの電位を印加した。分極電流が一定になったのを確認し、実施例1と同様に可視光を30秒間隔で照射して、電流を測定した。
FTO基板を50mM塩化カリウムと2mM過マンガン酸カリウムを含む水溶液に浸漬し、0V(vs.銀/塩化銀)で通過電気量が20mC/cm2になるまで電気化学分解した。このようにして電極基板上に二酸化マンガン薄膜を形成し、洗浄、真空乾燥した。得られた二酸化マンガン薄膜は、カリウムがインターカレーとされたバーネサイト型層状マンガンの酸化物(K−birMnO2)であり、K−birMnO2層の厚みは、60nmであった。得られた電極(K−birMnO2/FTO電極)を、5Mエタノールを含む0.5M硫酸ナトリウム水溶液中に浸漬し、対極に白金電極を用いて、+1.0Vの電位を印加した。分極電流が一定になったのを確認し、実施例1と同様に可視光を30秒間隔で照射して、電流を測定した。
実施例1と同様に作製したMWCNT層を形成したFTO基板を電極(MWCNT/FTO電極)として、5Mエタノールを含む0.5M硫酸ナトリウム水溶液中に浸漬し、対極に白金電極を用いて、+1.0Vの電位を印加した。分極電流が一定になったのを確認し、実施例1と同様に可視光を30秒間隔で照射して、電流を測定した。
Claims (6)
- 導電性基板と、前記導電性基板上に形成された繊維状炭素層と、前記繊維状炭素層上に形成されたバーネサイト型層状マンガン酸化物層とを有する光電極。
- 繊維状炭素が、カーボンナノチューブであることを特徴とする請求項1記載の光電極。
- バーネサイト型層状マンガン酸化物が、アルカリ金属イオンがインターカレートされていることを特徴とする請求項1又は2記載の光電極。
- 請求項1〜3のいずれか記載の光電極と電解質層と対極とを備えた光電変換素子。
- 請求項1〜3のいずれか記載の光電極と電解質層と酸化還元可能な対極とを備え、対極が還元されることにより光電流が充電されることを特徴とする光充電可能なレドックスキャパシタ。
- 導電性基板上に繊維状炭素層を形成し、前記繊維状炭素層が形成された導電性基板を、アルカリ金属イオンと過マンガン酸イオンが存在する溶液に浸漬し、前記過マンガン酸イオンを電気化学的に還元することにより前記繊維状炭素層上にバーネサイト型層状マンガン酸化物層を形成することを特徴とする光電極の製造方法。
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JP7199039B2 (ja) | 2015-07-08 | 2023-01-05 | パナソニックIpマネジメント株式会社 | 撮像装置 |
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