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- Title
Interfacial Charge Transfer Bridge Prolongs Carrier Recombination Lifetimes of CoFe Metal‐Thiolate Framework/Hematite Photoanode for Water Oxidation.
- Authors
Yang, Tao; Chen, Zong‐Wei; Yue, Xin‐Zheng; Liu, Qing‐Chao; Yi, Sha‐Sha; Zhu, Yong‐Fa
- Abstract
Constructing heterostructural photoanodes is attractive for elevating the photoelectrochemical (PEC) performance, however, it is a long‐standing challenge to achieve highly efficient interfacial charge transfer. Herein, a CoFe metal‐thiolate framework (CoFe MTF)/Fe2O3 photoanode connected by an interfacial Fe─O─N/S bond is designed to modulate the behavior of charge carriers and improve water oxidation performance. It is disclosed that this interfacial bond functions as a direct charge transfer bridge between shallow trap states of Fe2O3 and CoFe MTF, leading to prolonged carrier recombination lifetimes (85 ns for CoFe MTF/Fe2O3 compared to 37 ns for Fe2O3) and enhanced charge transfer efficiency. Alternatively, a robust interfacial electric field is established in the CoFe MTF/Fe2O3 p–n heterojunction, facilitating efficient charge transfer. As expected, the CoFe MTF/Fe2O3 photoanode exhibits significant enhancement in water oxidation, resulting in a three‐fold increase in photocurrent density compared to pristine Fe2O3. This study highlights the significance of designing interfacially bonded heterostructural photoelectrodes to regulate the transfer characters of charge carriers.
- Subjects
CHARGE transfer; OXIDATION of water; CHARGE carriers; P-N heterojunctions; INTERFACIAL bonding; PHOTOELECTROCHEMICAL cells; HEMATITE
- Publication
Advanced Functional Materials, 2024, Vol 34, Issue 18, p1
- ISSN
1616-301X
- Publication type
Article
- DOI
10.1002/adfm.202313767