Efficient Water Oxidation Using Ta3 N5 Thin Film Photoelectrodes Prepared on Insulating Transparent Substrates.,ChemSusChem

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Efficient Water Oxidation Using Ta3 N5 Thin Film Photoelectrodes Prepared on Insulating Transparent Substrates.
ChemSusChem ( IF 7.5 ) Pub Date : 2020-03-20 , DOI: 10.1002/cssc.202000397
Tomohiro Higashi ₁ , Hiroshi Nishiyama ₂ , Yuki Otsuka ₁ , Yudai Kawase ₁ , Yutaka Sasaki ₂ , Mamiko Nakabayashi ₃ , Masao Katayama ₁ , Tsutomu Minegishi ₁ , Naoya Shibata ₃ , Kazuhiro Takanabe ₁ , Taro Yamada ₂ , Kazunari Domen _{2,

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Affiliation

Photoelectrochemical (PEC) water splitting using visible-light-responsive photoelectrodes is the preferred approach to converting solar energy into hydrogen as a renewable energy source. A transparent Ta3 N5 photoanode embedded within a PEC cell having a tandem configuration is a promising configuration that may provide a high solar-to-hydrogen energy conversion efficiency. Ta3 N5 thin films are typically prepared by heating precursor films in an NH3 flow at high temperatures, which tends to degrade the transparent conductive layer, such that producing efficient Ta3 N5 transparent photoanodes is challenging. Herein, the direct preparation of transparent Ta3 N5 photoanodes on insulating quartz substrates was demonstrated without the insertion of a transparent conductive layer. The resulting devices generated a photocurrent of 6.0 mA cm-2 at 1.23 V vs. a reversible hydrogen electrode under simulated sunlight. This study provides a new strategy for the preparation of transparent photoelectrodes that mitigates current challenges.

中文翻译：

使用在绝缘透明基板上制备的Ta3 N5薄膜光电电极进行高效水氧化。

使用可见光响应光电极进行光化学（PEC）水分解是将太阳能转换成氢作为可再生能源的首选方法。嵌入具有串联配置的PEC电池中的透明Ta3 N5光电阳极是一种有前途的配置，可以提供高的太阳能到氢能转换效率。通常通过在NH 3流中在高温下加热前体膜来制备Ta 3 N 5薄膜，这倾向于使透明导电层劣化，使得生产有效的Ta 3 N 5透明光阳极是具有挑战性的。本文中，在不插入透明导电层的情况下，证明了在绝缘石英基板上直接制备透明的Ta3 N5光电阳极。所得器件在1时产生6.0 mA cm-2的光电流。在模拟阳光下，相对于可逆氢电极为23V。这项研究为减少当前挑战的透明光电极的制备提供了新的策略。

更新日期：2020-04-22

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