Unveiling Charge Carrier Dynamics at Organic-Inorganic S-Scheme Heterojunction Interfaces Insights From Advanced EPR

Unveiling Charge Carrier Dynamics at Organic-Inorganic S-Scheme Heterojunction Interfaces : Insights From Advanced EPR

© 2024 Wiley‐VCH GmbH.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - (2024) vom: 15. Dez., Seite e2414803
1. Verfasser: Gu, Miaoli (VerfasserIn)
Weitere Verfasser: Zhang, Jianjun, Kurganskii, Ivan V, Poryvaev, Artem S, Fedin, Matvey V, Cheng, Bei, Yu, Jiaguo, Zhang, Liuyang
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2024
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article EPR S‐scheme heterojunction extended carrier lifetime interfacial charge transfer organic–inorganic
Beschreibung
Zusammenfassung:© 2024 Wiley‐VCH GmbH.
Understanding charge carrier transfer at heterojunction interfaces is critical for advancing solar energy conversion technologies. This study utilizes continuous wave (CW), pulse, and time-resolved (TR) electron paramagnetic resonance (EPR) spectroscopy to explore the radical species formed at the TAPA (tris(4-aminophenyl)amine)-PDA (Terephthaldicarboxaldehyde)/ZnIn2S4 (TP/ZIS) heterojunction interface. CW and pulse EPR identify stable radical defects localized near the interface, accessible to water molecules. Time-resolved EPR reveals a photoinduced electron transfer from TP to ZIS, leading to the generation of spin-correlated radical pairs under light irradiation, signifying efficient charge carrier separation and spatial transfer within the S-scheme heterojunction. This electron transfer mechanism, confirmed through in situ X-ray photoelectron spectroscopy and femtosecond transient absorption spectroscopy, suppresses undesirable carrier recombination, extending charge carrier lifetimes. These findings provide novel insights into the transport direction of charge carriers at the S-scheme heterojunction interface, offering valuable guidance for designing highly efficient and stable organic-inorganic heterojunction photocatalysts for solar energy applications
Beschreibung:Date Revised 16.12.2024
published: Print-Electronic
Citation Status Publisher
ISSN:1521-4095
DOI:10.1002/adma.202414803