Dipole‐Manipulated Built‐In Electric Field Enables Ultrafast Charge Separation in Perylene Diimide Polymers for Photoelectrochemical Water Splitting
Source abstract
Abstract
ABSTRACT Molecular dipole engineering in dendrimeric perylene diimide (PDI) polymers creates powerful built‐in electric fields (BIEFs) that dramatically enhance photoelectrochemical performance. By strategically tuning nitrogen content in aromatic linkers (pyridine, pyrimidine, and 1,3,5‐triazine), the pyridine‐linked C 5 N 1 ‐PDI achieves exceptional photocurrent density (68.7 µA cm − 2 at 1.23 V vs. RHE), outperforming its counterparts by 3.42–229 times. Ultrafast spectroscopy reveals this enhancement originates from sub‐picosecond charge separation and efficient multi‐electron accumulation, while theoretical modeling confirms the critical role of linker polarity in BIEF amplification. This work establishes a fundamental structure‐kinetics relationship for designing high‐performance organic photoelectrodes, providing a versatile strategy for advancing solar energy conversion technologies.
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Research context
OpenAlex topics: TiO2 Photocatalysis and Solar Cells · Advanced Photocatalysis Techniques · Electrocatalysts for Energy Conversion
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Chemistry Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province Shantou University Guangdong P. R. China
State Key Laboratory of Information Photonic and Optical Communications and School of Science Beijing University of Posts and Telecommunications Beijing P. R. China
Funding
National Natural Science Foundation of China · Basic and Applied Basic Research Foundation of Guangdong Province
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