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231225s2019 xx |||||o 00| ||eng c |
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|a 10.1002/adma.201903316
|2 doi
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|a DE-627
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|a eng
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|a Kim, Myeongjin
|e verfasserin
|4 aut
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|a Oxygen-Vacancy-Introduced BaSnO3- δ Photoanodes with Tunable Band Structures for Efficient Solar-Driven Water Splitting
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|c 2019
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Revised 01.10.2020
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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|a To achieve excellent photoelectrochemical water-splitting activity, photoanode materials with high light absorption and good charge-separation efficiency are essential. One effective strategy for the production of materials satisfying these requirements is to adjust their band structure and corresponding bandgap energy by introducing oxygen vacancies. A simple chemical reduction method that can systematically generate oxygen vacancies in barium stannate (BaSnO3 (BSO)) crystal is introduced, which thus allows for precise control of the bandgap energy. A BSO photoanode with optimum oxygen-vacancy concentration (8.7%) exhibits high light-absorption and good charge-separation capabilities. After deposition of FeOOH/NiOOH oxygen evolution cocatalysts on its surface, this photoanode shows a remarkable photocurrent density of 7.32 mA cm-2 at a potential of 1.23 V versus a reversible hydrogen electrode under AM1.5G simulated sunlight. Moreover, a tandem device constructed with a perovskite solar cell exhibits an operating photocurrent density of 6.84 mA cm-2 and stable gas production with an average solar-to-hydrogen conversion efficiency of 7.92% for 100 h, thus functioning as an outstanding unbiased water-splitting system
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|a Journal Article
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|a bandgap energy
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|a barium stannate
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|a charge-separation efficiency
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|a photoanodes
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|a Lee, Byeongyong
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Ju, Hyun
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Kim, Jin Young
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Kim, Jooheon
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Lee, Seung Woo
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 31(2019), 33 vom: 06. Aug., Seite e1903316
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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| 773 |
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|g volume:31
|g year:2019
|g number:33
|g day:06
|g month:08
|g pages:e1903316
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|u http://dx.doi.org/10.1002/adma.201903316
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