Journal Article

PUBDB-2025-01623

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Unveiling high-mobility hot carriers in a two-dimensional conjugated coordination polymer

Fu, S. ; Huang, X. ; Gao, G. ; St. Petkov, P. ; Gao, W. ; Zhang, J.Extern* ; Gao, L. ; Zhang, H. ; Liu, M. ; Hambsch, M.Extern* ; Zhang, W. ; Zhang, J.Extern* ; Li, K. ; Kaiser, U. ; Parkin, S. S. P. ; Mannsfeld, S.Extern* ; Zhu, T. (Corresponding author) ; Wang, H. I. (Corresponding author) ; Wang, Z. (Corresponding author)Extern* ; Dong, R. (Corresponding author) ; Feng, X. (Corresponding author)Extern* ; Bonn, M. (Corresponding author)

2025
Nature Publishing Group Basingstoke

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Please use a persistent id in citations: doi:10.1038/s41563-025-02246-2

Abstract: Hot carriers, inheriting excess kinetic energy from high-energy photons, drive numerous optoelectronic applications reliant on non-equilibrium transport processes. Although extensively studied in inorganic materials, their potential in organic-based systems remains largely unexplored. Here we demonstrate highly mobile hot carriers in crystalline two-dimensional conjugated coordination polymer Cu3BHT (BHT, benzenehexathiol) films. Leveraging a suite of ultrafast spectroscopic and imaging techniques, we map the microscopic charge transport landscape in Cu3BHT films following non-equilibrium photoexcitation across temporal, spatial and frequency domains, revealing two distinct high-mobility transport regimes. In the non-equilibrium regime, hot carriers achieve an ultrahigh mobility of ~2,000 cm2 V–1 s–1, traversing grain boundaries up to ~300 nm within a picosecond. In the quasi-equilibrium regime, free carriers exhibit Drude-type, band-like transport with a remarkable mobility of ~400 cm2 V–1 s–1 and an intrinsic diffusion length exceeding 1 μm. These findings position two-dimensional conjugated coordination polymers as versatile platforms for advancing organic-based hot carrier applications.

Note: online first

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Contributing Institute(s):

1. FS DOOR-User (FS DOOR-User)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
2. FS-Proposal: I-20230095 (I-20230095) (I-20230095)

Experiment(s):

1. PETRA Beamline P08 (PETRA III)

Appears in the scientific report 2025

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Database coverage:
; BIOSIS Previews ; Biological Abstracts ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Nature ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 40 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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