High-performance and stable photoelectrochemical water splitting cell with organic-photoactive-layer-based photoanode
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- High-performance and stable photoelectrochemical water splitting cell with organic-photoactive-layer-based photoanode
- Yu, Je Min; Lee, Jungho; Kim, Yoon Seo; Song, Jaejung; Oh, Jiyeon; Lee, Sang Myeon; Jeong, Mingyu.; Kim, Yongseon; Kwak, Ja Hun; Cho, Seungho; Yang, Changduk; Jang, Ji-Wook
- Issue Date
- Nature Research
- NATURE COMMUNICATIONS, v.11, no.1, pp.5509
- Considering their superior charge-transfer characteristics, easy tenability of energy levels, and low production cost, organic semiconductors are ideal for photoelectrochemical (PEC) hydrogen production. However, organic-semiconductor-based photoelectrodes have not been extensively explored for PEC water-splitting because of their low stability in water. Herein, we report high-performance and stable organic-semiconductors photoanodes consisting of p-type polymers and n-type non-fullerene materials, which is passivated using nickel foils, GaIn eutectic, and layered double hydroxides as model materials. We achieve a photocurrent density of 15.1 mA cm−2 at 1.23 V vs. reversible hydrogen electrode (RHE) with an onset potential of 0.55 V vs. RHE and a record high half-cell solar-to-hydrogen conversion efficiency of 4.33% under AM 1.5 G solar simulated light. After conducting the stability test at 1.3 V vs. RHE for 10 h, 90% of the initial photocurrent density are retained, whereas the photoactive layer without passivation lost its activity within a few minutes. © 2020, The Author(s).
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